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Chatkalite
Chatkalite is an copper, iron, tin sulfide mineral with formula Cu6Fe2+Sn6S8. It crystallizes in the tetragonal crystal system and forms as rounded dissemations within tetrahedrite in quartz veins. ==Physical properties==
Chatkalite can have sizes ranging from rounded grains of about 100 micron when found within a tetrahedrite. It has a metallic luster, a hardness of 274 on the Vickers scale and a hardness of 4.5 on the Mohs scale. It has a color of pale rose in reflected light with no internal reflection. Its diaphaneity can be described as opaque. It does not exhibit any cleavage or twinning properties. Chatkalite is anisotropic which is characteristic of the stannite group. Its anisotropic intensity is a weak shade of brown.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Chatkalite」の詳細全文を読む
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