Evgraf Fedorov
Videos
Evgraf Stepanovich Fedorov was a Russian mathematician, crystallographer and mineralogist.
Evgraf Stepanovich Fedorov
Evgraf Fjodorow Strasse
Geometrical crystallography before X-rays describes how geometrical crystallography developed as a science up to the discovery of X-rays by Wilhelm Conrad Röntgen in 1895. In the period before X-rays,
Cannonballs piled on a triangular (front) and rectangular (back) base, both face-centered cubic lattices.
Drawing by Kepler (1611) of square (A) and hexagonal (B) packings
René Just Haüy
Christian Samuel Weiss