The Armenian Highlands is the central-most and highest of three land-locked plateaus that together form the northern sector of the Middle East. To its west is the Anatolian plateau which rises from the lowland coast of the Aegean Sea and converges with the Armenian Highlands to the east of Cappadocia. To its southeast is the Iranian plateau, where the elevation drops by about 600 metres to 1,500 metres above sea level; the Caucasus extends to the northeast of the Armenian Highlands. To the southwest of the Armenian Highlands is Upper Mesopotamia. During the Iron Age, the region was known by variations of the name Ararat. During Antiquity, it was known as "Armenia Major," a central region to the history of Armenians, one of the four geo-political regions associated with Armenians, the other three being Armenia Minor and Commagene. Since the 1040s the highlands have been under the rule of various Turkic peoples and the Safavid dynasty. Much of Eastern Armenia, ruled by the Safavids from the 16th century, came under Russian control in 1828.
While much of Western Armenia was under the rule of the Ottomans and incorporated into Turkey. The highlands are divided into western and eastern regions, defined by the Ararat Valley where Mount Ararat is located; the region to the west of the Ararat Valley, conventionally called "Western Armenia", is now part of present day eastern Anatolia, the region to the east, conventionally called "Eastern Armenia," is now referred to as "Lesser Caucasus" or "Caucasus Minor." The region was mainly inhabited by Armenians, minorities of Assyrians, Greeks and Iranians. During the Middle Ages and Turkmens and Kurds settled in large numbers in the Armenian Highlands; the Christian population of the western half of the region was exterminated during the Armenian Genocide of 1915 and on a smaller scale the Assyrian Genocide and Greek Genocide. Today, the eastern half is inhabited by Armenians and Georgians, while the western half is inhabited by Azerbaijanis, Kurds and Zazas, with a minority of Assyrians; the Armenian Highlands is part of the Alpide belt, forming part of the Asian range that stretches from the Pontic Mountains to the Malay Peninsula.
Its total area is about 400,000 km2. The Armenian Highlands have been the scene of great volcanic activity. Geologically recent volcanism on the area has resulted in large volcanic formations and a series of massifs and tectonic movement has formed the three largest lakes in the Highland, Lake Sevan, Lake Van and Lake Urmia; the Armenian Highlands are rich in water resources. The central, axial chain of Armenian highland ridges, running from west to east across Western Armenia, is called Anti-Taurus. In the west, the Anti-Taurus departs to the north from the Central Taurus, passing right in the middle of the Armenian plateau, parallel to the Eastern Taurus, ends in the east with Ararat peaks. Most of the Armenian Highlands is in present day eastern Anatolia, includes northwestern Iran, all of Armenia, southern Georgia, western Azerbaijan, its northeastern parts are known as Lesser Caucasus, a center of Armenian culture. From 4000 to 1000 BC, tools and trinkets of copper and iron were produced in this region and traded in neighboring lands where those metals were less abundant.
It is traditionally believed to be one of the possible locations of the Garden of Eden. The Armenian Plateau has been called the "epicenter of the Iron Age", since it appears to be the location of the first appearance of Iron Age metallurgy in the late 2nd millennium BC. In the Early Iron Age, the Kingdom of Van controlled much of the region, until it was overthrown by the Medes and Orontid dynasty. In Gilgamesh, the land of Aratta is placed in a geographic space that could be describing the Armenian plateau. Throughout Classical Antiquity and the Middle Ages, during various centuries, the Armenian Highlands was a contested territory of the Iranian Parthian Empire, Sassanid Persian Empire, Byzantine Empire, the Arab Caliphate. From the early modern era and on, the region came directly under Safavid Iranian rule. Contested for centuries between the Iranian Safavids and its vying archrival the Ottoman Empire with numerous wars raging over the region, large parts of the Highlands comprising Western Armenia were conquered by the Ottoman Empire in the first half of the 17th century following the Ottoman–Safavid War and the outcoming Treaty of Zuhab, while Eastern Armenia, forming another major part of the Highlands, stayed in Iranian hands up to the course of the 19th century, when it was ceded to Imperial Russia.
During the first half of the 19th century, the Ottoman held parts of the Armenian Highlands comprising Western Armenia now formed the boundary of the Ottoman sphere of influence and the Russian sphere of influence, the latter who had just completed its conquest of the Caucasus and Eastern Armenia at the expense of its suzerain, Qajar Iran, in about 4 major wars spanning more than two centuries. According to Richard Hovannisian, the Armenian Genocide was the "physical elimination of the Armenian people and most of the evidence of their having lived on the great highland called the Armenian Plateau, to which the perpetrator side soon assigned the new name of Eastern Anatolia". Since the Armenian Genocide and dissolution of the Ottoman Empire after World War I, it has been the boundary region of Turkey and the Sovie
The Caucasus or Caucasia is an area situated between the Black Sea and the Caspian Sea and occupied by Russia, Georgia and Armenia. It is home to the Caucasus Mountains, including the Greater Caucasus mountain range, considered a natural barrier between Eastern Europe and Western Asia. Europe's highest mountain, Mount Elbrus, at 5,642 metres is located in the west part of the Greater Caucasus mountain range. On the southern side, the Lesser Caucasus includes the Javakheti Plateau and grows into the Armenian highlands, part of, located in Turkey; the Caucasus region is separated into northern and southern parts – the North Caucasus and Transcaucasus, respectively. The Greater Caucasus mountain range in the north is within the Russian Federation, while the Lesser Caucasus mountain range in the south is occupied by several independent states, namely Georgia, Armenia and the recognised Artsakh Republic; the region is known for its linguistic diversity: aside from Indo-European and Turkic languages, the Kartvelian, Northwest Caucasian, Northeast Caucasian families are indigenous to the area.
The term Caucasus is not only used for the mountains themselves but includes Ciscaucasia and Transcaucasia. According to Alexander Mikaberidze, Transcaucasia is a "Russo-centric" term. Pliny the Elder's Natural History derives the name of the Caucasus from Scythian kroy-khasis. German linguist Paul Kretschmer notes that the Latvian word Kruvesis means "ice". In the Tale of Past Years, it is stated that Old East Slavic Кавкасийскыѣ горы came from Ancient Greek Καύκασος ), according to M. A. Yuyukin, is a compound word that can be interpreted as the "Seagull's Mountain" According to German philologists Otto Schrader and Alfons A. Nehring, the Ancient Greek word Καύκασος is connected to Gothic Hauhs as well as Lithuanian Kaũkas and Kaukarà. British linguist Adrian Room points out that Kau- means "mountain" in Pelasgian; the Transcaucasus region and Dagestan were the furthest points of Parthian and Sasanian expansions, with areas to the north of the Greater Caucasus range impregnable. The mythological Mount Qaf, the world's highest mountain that ancient Iranian lore shrouded in mystery, was said to be situated in this region.
In Middle Persian sources of the Sasanian era, the Caucasus range was referred to as Kaf Kof. The term resurfaced in Iranian tradition on in a variant form when Ferdowsi, in his Shahnameh, referred to the Caucasus mountains as Kōh-i Kāf. "Most of the modern names of the Caucasus originate from the Greek Kaukasos and the Middle Persian Kaf Kof"."The earliest etymon" of the name Caucasus comes from Kaz-kaz, the Hittite designation of the "inhabitants of the southern coast of the Black Sea". It was noted that in Nakh Ков гас means "gateway to steppe" The modern name for the region is similar in the many languages, is between Kavkaz and Kawkaz; the North Caucasus region is known as the Ciscaucasus, whereas the South Caucasus region is known as the Transcaucasus. The Ciscaucasus contains most of the Greater Caucasus mountain range, it consists of Southern Russia the North Caucasian Federal District's autonomous republics, the northernmost parts of Georgia and Azerbaijan. The Ciscaucasus lies between the Black Sea to its west, the Caspian Sea to its east, borders the Southern Federal District to its north.
The two Federal Districts are collectively referred to as "Southern Russia." The Transcaucasus borders the Greater Caucasus range and Southern Russia to its north, the Black Sea and Turkey to its west, the Caspian Sea to its east, Iran to its south. It contains surrounding lowlands. All of Armenia and Georgia are in the South Caucasus; the watershed along the Greater Caucasus range is perceived to be the dividing line between Europe and Southwest Asia. The highest peak in the Caucasus is Mount Elbrus located in western Ciscaucasus, is considered as the highest point in Europe; the Caucasus is one of the culturally diverse regions on Earth. The nation states that comprise the Caucasus today are the post-Soviet states Georgia, Azerbaijan and the Russian Federation; the Russian divisions include Dagestan, Ingushetia, North Ossetia–Alania, Kabardino–Balkaria, Karachay–Cherkessia, Krasnodar Krai and Stavropol Krai, in clockwise order. Three territories in the region claim independence but are recognized as such by only a handful entities: Artsakh and South Ossetia.
Abkhazia and South Ossetia are recognized by the world community as part of Georgia, Artsakh as part of Azerbaijan. The region has language families. There are more than 50 ethnic groups living in the region. No fewer than three language families are unique to the area. In addition, Indo-European languages, such as Armenian and Ossetian, Turkic languages, such as Azerbaijani, Kumyk language and Karachay–Balkar, are spoken in the area. Russian is used as a lingua franca most notably in the North Caucasus; the peoples of the northern and southern Caucasus tend to be either Sunni Muslims, Eastern Orthodox Christians and Armenian Christians. Twelver Shi'
Cambridge University Press
Cambridge University Press is the publishing business of the University of Cambridge. Granted letters patent by King Henry VIII in 1534, it is the world's oldest publishing house and the second-largest university press in the world, it holds letters patent as the Queen's Printer. The press mission is "to further the University's mission by disseminating knowledge in the pursuit of education and research at the highest international levels of excellence". Cambridge University Press is a department of the University of Cambridge and is both an academic and educational publisher. With a global sales presence, publishing hubs, offices in more than 40 countries, it publishes over 50,000 titles by authors from over 100 countries, its publishing includes academic journals, reference works and English language teaching and learning publications. Cambridge University Press is a charitable enterprise that transfers part of its annual surplus back to the university. Cambridge University Press is both the oldest publishing house in the world and the oldest university press.
It originated from letters patent granted to the University of Cambridge by Henry VIII in 1534, has been producing books continuously since the first University Press book was printed. Cambridge is one of the two privileged presses. Authors published by Cambridge have included John Milton, William Harvey, Isaac Newton, Bertrand Russell, Stephen Hawking. University printing began in Cambridge when the first practising University Printer, Thomas Thomas, set up a printing house on the site of what became the Senate House lawn – a few yards from where the press's bookshop now stands. In those days, the Stationers' Company in London jealously guarded its monopoly of printing, which explains the delay between the date of the university's letters patent and the printing of the first book. In 1591, Thomas's successor, John Legate, printed the first Cambridge Bible, an octavo edition of the popular Geneva Bible; the London Stationers objected strenuously. The university's response was to point out the provision in its charter to print "all manner of books".
Thus began the press's tradition of publishing the Bible, a tradition that has endured for over four centuries, beginning with the Geneva Bible, continuing with the Authorized Version, the Revised Version, the New English Bible and the Revised English Bible. The restrictions and compromises forced upon Cambridge by the dispute with the London Stationers did not come to an end until the scholar Richard Bentley was given the power to set up a'new-style press' in 1696. In July 1697 the Duke of Somerset made a loan of £200 to the university "towards the printing house and presse" and James Halman, Registrary of the University, lent £100 for the same purpose, it was in Bentley's time, in 1698, that a body of senior scholars was appointed to be responsible to the university for the press's affairs. The Press Syndicate's publishing committee still meets and its role still includes the review and approval of the press's planned output. John Baskerville became University Printer in the mid-eighteenth century.
Baskerville's concern was the production of the finest possible books using his own type-design and printing techniques. Baskerville wrote, "The importance of the work demands all my attention. Caxton would have found nothing to surprise him if he had walked into the press's printing house in the eighteenth century: all the type was still being set by hand. A technological breakthrough was badly needed, it came when Lord Stanhope perfected the making of stereotype plates; this involved making a mould of the whole surface of a page of type and casting plates from that mould. The press was the first to use this technique, in 1805 produced the technically successful and much-reprinted Cambridge Stereotype Bible. By the 1850s the press was using steam-powered machine presses, employing two to three hundred people, occupying several buildings in the Silver Street and Mill Lane area, including the one that the press still occupies, the Pitt Building, built for the press and in honour of William Pitt the Younger.
Under the stewardship of C. J. Clay, University Printer from 1854 to 1882, the press increased the size and scale of its academic and educational publishing operation. An important factor in this increase was the inauguration of its list of schoolbooks. During Clay's administration, the press undertook a sizeable co-publishing venture with Oxford: the Revised Version of the Bible, begun in 1870 and completed in 1885, it was in this period as well that the Syndics of the press turned down what became the Oxford English Dictionary—a proposal for, brought to Cambridge by James Murray before he turned to Oxford. The appointment of R. T. Wright as Secretary of the Press Syndicate in 1892 marked the beginning of the press's development as a modern publishing business with a defined editorial policy and administrative structure, it was Wright who devised the plan for one of the most distinctive Cambridge contributions to publishing—the Cambridge Histories. The Cambridge Modern History was published
The Russian Empire known as Imperial Russia or Russia, was an empire that existed across Eurasia and North America from 1721, following the end of the Great Northern War, until the Republic was proclaimed by the Provisional Government that took power after the February Revolution of 1917. The third largest empire in world history, at its greatest extent stretching over three continents, Europe and North America, the Russian Empire was surpassed in landmass only by the British and Mongol empires; the rise of the Russian Empire coincided with the decline of neighboring rival powers: the Golden Horde, the Swedish Empire, the Polish–Lithuanian Commonwealth and the Ottoman Empire. It played a major role in 1812–1814 in defeating Napoleon's ambitions to control Europe and expanded to the west and south; the House of Romanov ruled the Russian Empire from 1721 until 1762, its matrilineal branch of patrilineal German descent the House of Holstein-Gottorp-Romanov ruled from 1762. At the beginning of the 19th century, the Russian Empire extended from the Arctic Ocean in the north to the Black Sea in the south, from the Baltic Sea on the west to the Pacific Ocean, into Alaska and Northern California in America on the east.
With 125.6 million subjects registered by the 1897 census, it had the third-largest population in the world at the time, after Qing China and India. Like all empires, it included a large disparity in terms of economics and religion. There were numerous dissident elements. Economically, the empire had a predominantly agricultural base, with low productivity on large estates worked by serfs, Russian peasants; the economy industrialized with the help of foreign investments in railways and factories. The land was ruled by a nobility from the 10th through the 17th centuries, subsequently by an emperor. Tsar Ivan III laid the groundwork for the empire that emerged, he tripled the territory of his state, ended the dominance of the Golden Horde, renovated the Moscow Kremlin, laid the foundations of the Russian state. Emperor Peter the Great fought numerous wars and expanded an huge empire into a major European power, he moved the capital from Moscow to the new model city of St. Petersburg, led a cultural revolution that replaced some of the traditionalist and medieval social and political mores with a modern, Europe-oriented, rationalist system.
Empress Catherine the Great presided over a golden age. Emperor Alexander II promoted numerous reforms, most the emancipation of all 23 million serfs in 1861, his policy in Eastern Europe involved protecting the Orthodox Christians under the rule of the Ottoman Empire. That connection by 1914 led to Russia's entry into the First World War on the side of France, the United Kingdom, Serbia, against the German and Ottoman empires; the Russian Empire functioned as an absolute monarchy on principles of Orthodoxy and Nationality until the Revolution of 1905 and became a de jure constitutional monarchy. The empire collapsed during the February Revolution of 1917 as a result of massive failures in its participation in the First World War. Though the Empire was only proclaimed by Tsar Peter I following the Treaty of Nystad, some historians would argue that it was born either when Ivan III of Russia conquered Veliky Novgorod in 1478, or when Ivan the Terrible conquered the Khanate of Kazan in 1552. According to another point of view, the term Tsardom, used after the coronation of Ivan IV in 1547, was a contemporary Russian word for empire.
Much of Russia's expansion occurred in the 17th century, culminating in the first Russian colonization of the Pacific in the mid-17th century, the Russo-Polish War that incorporated left-bank Ukraine, the Russian conquest of Siberia. Poland was divided in the 1790 -- 1815 era, with much of the population going to Russia. Most of the 19th-century growth came from adding territory in Asia, south of Siberia. Peter I the Great played a major role in introducing Russia to the European state system. While the vast land had a population of 14 million, grain yields trailed behind those of agriculture in the West, compelling nearly the entire population to farm. Only a small percentage lived in towns; the class of kholops, close in status to slavery, remained a major institution in Russia until 1723, when Peter converted household kholops into house serfs, thus including them in poll taxation. Russian agricultural kholops were formally converted into serfs earlier in 1679. Peter's first military efforts were directed against the Ottoman Turks.
His attention turned to the North. Peter still lacked a secure northern seaport, except at Archangel on the White Sea, where the harbor was frozen for nine months a year. Access to the Baltic was blocked by Sweden. Peter's ambitions for a "window to the sea" led him to make a secret alliance in 1699 with Saxony, the Polish–Lithuanian Commonwealth and Denmark against Sweden, resulting in the Great Northern War; the war ended in 1721. Peter acquired four provinces situated east of the Gulf of Finland; the coveted access to the sea was now secured. There he built Russia's new capital, Saint Petersburg, to replace Moscow, which had long been Russia's cultural center. In 1722, he tur
Humboldt University of Berlin
Humboldt University of Berlin is a university in the central borough of Mitte in Berlin, Germany. It was established by Frederick William III on the initiative of Wilhelm von Humboldt, Johann Gottlieb Fichte and Friedrich Ernst Daniel Schleiermacher as the University of Berlin in 1809, opened in 1810, making it the oldest of Berlin's four universities. From 1810 until its closure in 1945, it was named Friedrich Wilhelm University. During the Cold War the university found itself in East Berlin and was de facto split in two when the Free University of Berlin opened in West Berlin; the university received its current name in honour of Alexander and Wilhelm von Humboldt in 1949. The university is divided into nine faculties, including its medical school shared with the Free University of Berlin, has a student enrollment of around 32,000 students, offers degree programmes in some 189 disciplines from undergraduate to postdoctorate level, its main campus is located on the Unter den Linden boulevard in central Berlin.
The university is known worldwide for pioneering the Humboldtian model of higher education, which has influenced other European and Western universities, the university has been called "the mother of all modern universities."As of 2017, the university has been associated with 55 Nobel Prize winners, is considered one of the best universities in Europe as well as one of the most prestigious universities in the world for arts and humanities. It was regarded as the world's preeminent university for the natural sciences during the 19th and early 20th century, is linked to major breakthroughs in physics and other sciences by its professors such as Albert Einstein. Former faculty and notable alumni include eminent philosophers, artists, politicians, mathematicians and Heads of State; the University of Berlin was established on 16 August 1809, on the initiative of the liberal Prussian educational politician Wilhelm von Humboldt by King Friedrich Wilhelm III, during the period of the Prussian Reform Movement.
The university was located in a palace constructed from 1748-1766 for the late Prince Henry, the younger brother of Frederick the Great. After his widow and her ninety-member staff moved out, the first unofficial lectures were given in the building in the winter of 1809. Humboldt faced great resistance to his ideas, he submitted his resignation to the King in April 1810, was not present when the school opened that fall. The first students were admitted on 6 October 1810, the first semester started on 10 October 1810, with 256 students and 52 lecturers in faculties of law, medicine and philosophy under rector Theodor Schmalz; the university celebrates 15 October 1810 as the date of its opening. From 1828 to 1945, the school was named the Friedrich Wilhelm University, in honor of its founder. Ludwig Feuerbach one of the students, made a comment on the university in 1826: "There is no question here of drinking and plesant communal outings. Compared to this temple of work, the other universities appear like public houses."The university has been home to many of Germany's greatest thinkers of the past two centuries, among them the subjective idealist philosopher Johann Gottlieb Fichte, the theologian Friedrich Schleiermacher, the absolute idealist philosopher G.
W. F. Hegel, the Romantic legal theorist Friedrich Carl von Savigny, the pessimist philosopher Arthur Schopenhauer, the objective idealist philosopher Friedrich Schelling, cultural critic Walter Benjamin, famous physicists Albert Einstein and Max Planck; the founders of Marxist theory Karl Marx and Friedrich Engels attended the university, as did poet Heinrich Heine, novelist Alfred Döblin, founder of structuralism Ferdinand de Saussure, German unifier Otto von Bismarck, Communist Party of Germany founder Karl Liebknecht, African American Pan Africanist W. E. B. Du Bois and European unifier Robert Schuman, as well as the influential surgeon Johann Friedrich Dieffenbach in the early half of the 1800s; the structure of German research-intensive universities served as a model for institutions like Johns Hopkins University. Further, it has been claimed that "the'Humboldtian' university became a model for the rest of Europe with its central principle being the union of teaching and research in the work of the individual scholar or scientist."
In addition to the strong anchoring of traditional subjects, such as science, philosophy, history and medicine, the university developed to encompass numerous new scientific disciplines. Alexander von Humboldt, brother of the founder William, promoted the new learning. With the construction of modern research facilities in the second half of the 19th Century teaching of the natural sciences began. Famous researchers, such as the chemist August Wilhelm Hofmann, the physicist Hermann von Helmholtz, the mathematicians Ernst Eduard Kummer, Leopold Kronecker, Karl Weierstrass, the physicians Johannes Peter Müller, Albrecht von Graefe, Rudolf Virchow and Robert Koch, contributed to Berlin University's scientific fame. During this period of enlargement, the university expanded to incorporate other separate colleges in Berlin. An example would be the Pépinière and the Collegium Medico-chirurgicum. In 1717, King Friedrich I had built a quarantine house for Plague at the city gates, which in 1727 was rechristened by the "soldier king" Friedrich
Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, physical properties of minerals and mineralized artifacts. Specific studies within mineralogy include the processes of mineral origin and formation, classification of minerals, their geographical distribution, as well as their utilization. Early writing on mineralogy on gemstones, comes from ancient Babylonia, the ancient Greco-Roman world and medieval China, Sanskrit texts from ancient India and the ancient Islamic World. Books on the subject included the Naturalis Historia of Pliny the Elder, which not only described many different minerals but explained many of their properties, Kitab al Jawahir by Persian scientist Al-Biruni; the German Renaissance specialist Georgius Agricola wrote works such as De re metallica and De Natura Fossilium which began the scientific approach to the subject. Systematic scientific studies of minerals and rocks developed in post-Renaissance Europe; the modern study of mineralogy was founded on the principles of crystallography and to the microscopic study of rock sections with the invention of the microscope in the 17th century.
Nicholas Steno first observed the law of constancy of interfacial angles in quartz crystals in 1669. This was generalized and established experimentally by Jean-Baptiste L. Romé de l'Islee in 1783. René Just Haüy, the "father of modern crystallography", showed that crystals are periodic and established that the orientations of crystal faces can be expressed in terms of rational numbers, as encoded in the Miller indices. In 1814, Jöns Jacob Berzelius introduced a classification of minerals based on their chemistry rather than their crystal structure. William Nicol developed the Nicol prism, which polarizes light, in 1827–1828 while studying fossilized wood. James D. Dana published his first edition of A System of Mineralogy in 1837, in a edition introduced a chemical classification, still the standard. X-ray diffraction was demonstrated by Max von Laue in 1912, developed into a tool for analyzing the crystal structure of minerals by the father/son team of William Henry Bragg and William Lawrence Bragg.
More driven by advances in experimental technique and available computational power, the latter of which has enabled accurate atomic-scale simulations of the behaviour of crystals, the science has branched out to consider more general problems in the fields of inorganic chemistry and solid-state physics. It, retains a focus on the crystal structures encountered in rock-forming minerals. In particular, the field has made great advances in the understanding of the relationship between the atomic-scale structure of minerals and their function. To this end, in their focus on the connection between atomic-scale phenomena and macroscopic properties, the mineral sciences display more of an overlap with materials science than any other discipline. An initial step in identifying a mineral is to examine its physical properties, many of which can be measured on a hand sample; these can be classified into density. Hardness is determined by comparison with other minerals. In the Mohs scale, a standard set of minerals are numbered in order of increasing hardness from 1 to 10.
A harder mineral will scratch a softer, so an unknown mineral can be placed in this scale by which minerals it scratches and which scratch it. A few minerals such as calcite and kyanite have a hardness that depends on direction. Hardness can be measured on an absolute scale using a sclerometer. Tenacity refers to the way a mineral behaves when it is broken, bent or torn. A mineral can be brittle, sectile, flexible or elastic. An important influence on tenacity is the type of chemical bond. Of the other measures of mechanical cohesion, cleavage is the tendency to break along certain crystallographic planes, it is described by the orientation of the plane in crystallographic nomenclature. Parting is the tendency to break along planes of weakness due to twinning or exsolution. Where these two kinds of break do not occur, fracture is a less orderly form that may be conchoidal, splintery, hackly, or uneven. If the mineral is well crystallized, it will have a distinctive crystal habit that reflects the crystal structure or internal arrangement of atoms.
It is affected by crystal defects and twinning. Many crystals are polymorphic, having more than