出典:Wiktionary
allo- (“different”) + Ancient Greek κλάω (kláō, “break”) + -ite, due to its cleavage pattern distinct from that of marcasite.
alloclasite (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2010/11/25 00:48 UTC 版)
Alloclasite ((Co,Fe)AsS) is a sulfosalt mineral. It is a member of the arsenopyrite group. Alloclasite crystallizes in the monoclinic system and typically forms as columnar to radiating acicular prismatic clusters. It is an opaque steel-gray to silver-white, with a metallic lustre and a black streak. It is brittle with perfect cleavage, a Mohs hardness of 5 and a specific gravity of 5.91–5.95.