Stibnite - stibnite

Japanese: 輝安鉱 - きあんこう(英語表記)stibnite
Stibnite - stibnite

An important ore mineral of antimony. It has the same structure as bismuthite. The name horobetsune was once proposed for the mesophase, but is no longer used. Some say it is homomorphic with a red powdery amorphous substance called metastibnite, but others say that metastibnite contains a small amount of water. It occurs in hydrothermal deposits formed at relatively low temperatures, coexisting with pyrite, sphalerite, and berghierite, and forms columnar to needle-shaped crystals. The one from the Ichinogawa Mine (now closed) in Saijo City, Ehime Prefecture was world-famous for the size of its crystals and the complexity of its crystal faces, but now many fine crystals have been found in China. The English name comes from stibium, another name for the element antimony.

[Akira Kato March 18, 2016]

[References] | Antimony | Bismuthinite | Phase | Polymorphism [Supplementary information] | Stibnite (Data Note)
Stibnite(1)
Oita Prefecture, Hayami District, Yamaga Town (Yamaga Town, Kitsuki City), Umakami Mine © Masutomi Geological Society Museum, Public Interest Incorporated Foundation

Stibnite(1)

Stibnite(2)
Produced in Ichinokawa mine, Saijo, Ehime Prefecture ©Masutomi Geological Society Museum, Public Interest Incorporated Foundation

Stibnite(2)


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

重要なアンチモンの鉱石鉱物。輝蒼鉛鉱(きそうえんこう)とは同一構造。中間相に対し、かつて幌別鉱(ほろべつこう)という名称が提唱されたが、現在は用いられていない。メタ輝安鉱metastibniteと称する赤色粉末状の非晶質物質と同質異像関係にあるという説もあるが、メタ輝安鉱は少量の水分を含んでいるという説もある。比較的低温生成の熱水鉱床中に産し、黄鉄鉱、閃(せん)亜鉛鉱、ベルチェ鉱などと共存し、柱状から針状の結晶をなす。愛媛県西条市市ノ川(いちのがわ)鉱山(閉山)のものは、結晶の大きさ、結晶面の複雑さで世界的に有名であったが、現在は中国からかなりの良晶が発見されている。英名は元素アンチモンの別名スチビウムstibiumに由来する。

[加藤 昭 2016年3月18日]

[参照項目] | アンチモン | 輝蒼鉛鉱 | | 同質異像[補完資料] | 輝安鉱(データノート)
輝安鉱(1)
大分県速見郡山香町(杵築市山香町) 馬上鉱山産©公益財団法人益富地学会館">

輝安鉱(1)

輝安鉱(2)
愛媛県西条市 市ノ川鉱山産©公益財団法人益富地学会館">

輝安鉱(2)


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