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stichtite
Stichtite is a mineral, a carbonate of chromium and magnesium; formula Mg6Cr2CO3(OH)16·4H2O. Its colour ranges from pink through lilac to a rich purple colour. It is formed as an alteration product of chromite containing serpentine. It occurs in association with barbertonite (the hexagonal polymorph of Mg6Cr2CO3(OH)16·4H2O), chromite and antigorite.〔
Discovered in 1910 on the west coast of Tasmania, Australia, it was first recognised by A.S. Wesley a former chief chemist with the Mount Lyell Mining and Railway Company, it was named after Robert Carl Sticht the manager of the mine.〔 Tasmania Department of Mines, Geological Survey Record Number 9 ''Catalogue of the Minerals of Tasmania. Revised edition 1970, page 96 〕
It is observed in combination with green serpentine at Stichtite Hill near the Dundas Extended Mine, Dundas - east of Zeehan, as well as on the southern shore of Macquarie Harbour. It is exhibited in the ''West Coast Pioneers Museum'' in Zeehan. The only commercial mine for stichtite serpentine is located on Stichtite Hill. Stichtite has also been reported from the Barberton District, Transvaal; Darwendale, Zimbabwe; near Bou Azzer, Morocco; Cunningsburgh, the Shetland Islands of Scotland; Langban, Varmland, Sweden; the Altai Mountains, Russia; Langmuir Township, Ontario and the Megantic, Quebec; Bahia, Brazil; and the Keonjhar district, Orissa, India.〔
File:Stichtite on serpentine Basic hydrous magnesium chromate and carbonate New Amianthus Mine Transvaal South Africa 1623.jpg|Stichtite on serpentine, New Amianthus Mine, Transvaal South Africa
==References==
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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