出典:Wiktionary
greenockite (countable かつ uncountable, 複数形 greenockites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/16 15:30 UTC 版)
Greenockite is a rare cadmium mineral that consists of cadmium sulfide, CdS, in crystalline form. Greenockite crystallizes in the hexagonal system. It occurs as massive encrustations and as six-sided pyramidal crystals which vary in color from a honey yellow through shades of red to brown. The Mohs hardness is 3 to 3.5 and the specific gravity is 4.5 to 5.