Kristalogrāfija un kristaloķīmija(English)(1),19/20-P

Crystals, their main properties: homogeneity, anisotropy, ability to form polyhedrons, symmetry. Groups of mode of point and spatial symmetry. Common forms and combinations. Crystallographic axis. Symbols of faces. Bravais lattices. X-ray metry. Cubic and hexagonal arrangement of close-packing beads. Atomic and ionic indexes. Isomorphism, polymorphism, morphotrophy.