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Getchellite : ウィキペディア英語版
Getchellite

Getchellite is a rare sulfide of arsenic and antimony, AsSbS3, that was discovered by B. G. Weissberg of the New Zealand Department of Scientific and Industrial Research in 1963, and approved as a new species by the International Mineralogical Association in 1965. Many metal sulfides are grey to black, but a few are brightly colored. Orpiment is yellow to brownish gold, cinnabar is deep red and getchellite is a bright orange red.
==Thermal properties==
Getchellite turns darker red when heated, becoming black by the time it reaches its melting point. Close to this temperature it sublimes (changes directly from a solid to a vapour) and recrystallises on cooler surfaces as minute acicular black crystals.
Melting point: 340 °C to 355 °C. Boiling point: near 470 °C.〔Weissberg, B G, American Mineralogist (1965) Volume 50 pages 1817 to 1826〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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