Luzonite (English spelling)

Japanese: ルゾナイト（英語表記）luzonite

A type of copper ore, also known as luzonite. Chemical composition: Cu ₃ AsS ₄ . Tetragonal crystal system with zincblende-type crystal structure. Occurs almost entirely as agglomerated twinned aggregates, lacking cleavage. Dark reddish gray to dark purple gray. Mohs hardness: 3.5, specific gravity: 4.4-4.6, streaky black. Arsenocite, which has the same composition and wurtzite-type structure, is a high-temperature type and often coexists with it. Stibioluzonite (famatinite) is isomorphous and forms a continuous solid solution with Cu ₃ SbS ₄ .

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

銅鉱石の一つで，ルソン銅鉱ともいう。化学組成Cu₃AsS₄。正方晶系でセン(閃)亜鉛鉱型の結晶構造をもつ。ほぼ集片双晶集合体として産しへき開を欠く。暗赤灰～暗紫灰色。モース硬度3.5，比重4.4～4.6，条痕黒色。同じ組成でウルツ鉱型構造の硫ヒ銅鉱は高温型で，しばしば共生する。スティビオルゾナイトstibioluzonite(ファマチナイトfamatinite)Cu₃SbS₄とは同形で連続固溶体をつくる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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