Hafnium
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Hafnium is a chemical element; it has symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium mine
Hf crystal bar
Pieces of hafnium
Hafnium dioxide (HfO2)
Zircon crystal (2×2 cm) from Tocantins, Brazil
Tantalum
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Tantalum is a chemical element; it has symbol Ta and atomic number 73. It is named after Tantalus, a figure in Greek mythology. Tantalum is a very hard, ductile, lustrous, blue-gray transition metal t
Hafnium
…Shippingport Atomic Power Station (a conversion of a naval reactor) being a notable exception. Hafnium is used in alloys with iron, titanium, niobium, tantalum, and other metals. An alloy used for liquid-rocket thruster nozzles, for example the main engine of the Apollo Lunar Modules, is C103 which consists…
Tantalum single crystal and 1cm 3 cube
Tantalite, Pilbara district, Australia
Tantalum electrolytic capacitor