Sulfide minerals

Japanese: 硫化鉱物 - りゅうかこうぶつ(英語表記)sulfide mineral
Sulfide minerals
A general term for a group of minerals that are compounds of metal elements and sulfur. In addition to minerals with atomic ratios of metal to sulfur that are close to integers, such as 1:1 (sphalerite, galena, covellite, etc.), 2:1 (arginite, chalcocite, etc.), 1:2 (pyrite, marcasite, etc.), and 3:4 (greigite, smithite), there are many non-stoichiometric compound minerals (durletite, chalcocite, pyrrhotite, etc.). Most of the major ores of heavy metals occur as sulfide minerals.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
金属元素と硫黄の化合物から成る鉱物群の総称。金属と硫黄の原子比が,1:1のもの (閃亜鉛鉱,方鉛鉱,銅藍など) や,2:1のもの (輝銀鉱,輝銅鉱など) ,1:2のもの (黄鉄鉱,白鉄鉱など) ,3:4のもの (グレーグ鉱,スミス鉱) など,ほぼ整数比になっているもののほか,多くの不定比化合物鉱物 (デュルレ鉱,方輝銅鉱,磁硫鉄鉱など) が知られている。重金属の主要鉱石鉱物は大部分硫化鉱物として産する。

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