- hextetrahedral class
- крист. гексатетраэдрический класс
English-Russian electronics dictionary .
English-Russian electronics dictionary .
Cubic crystal system — A rock containing three crystals of pyrite (FeS2). The crystal structure of pyrite is simple cubic, and this is reflected in the cubic symmetry of its natural crystal facets … Wikipedia
Coloradoite — from the La Plata District of Colorado General Category Telluride mineral … Wikipedia