- hemihedral class
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гемиэдрический класс
Англо-русский словарь терминов металлургии и сварки. 2011.
Англо-русский словарь терминов металлургии и сварки. 2011.
Scolecite — is a tectosilicate mineral belonging to the zeolite group; a hydrated calcium silicate, CaAl2Si3O10 middot;3H2O. Its name came from the Greek word, skolec = worm because of its reaction to the blowpipe flame. It is a calcium zeolite, and like the … Wikipedia
Pyrargyrite — General Category Sulfosalt Chemical formula Ag3SbS3 … Wikipedia
Monoclinic crystal system — An example of the monoclinic crystals, orthoclase In crystallography, the monoclinic crystal system is one of the 7 lattice point groups. A crystal system is described by three vectors. In the monoclinic system, the crystal is described by… … Wikipedia