Talk:Bismutite

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Rocks and minerals Low‑importance

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EB1911 origin of page

Not 1911 now. Page moved to correct name and re-written. Vsmith (talk) 00:13, 28 April 2008 (UTC)[reply]

The EB1911 article "Bismuthite" (with an H) is about Bi₂S₃, even more confusing. (It goes on: " The colour is lead-grey inclining to tin-white and often with a yellowish or iridescent tarnish. The hardness is 2; specific gravity 6.4-6.5. Bismuthite occurs at several localities in Cornwall and Bolivia, often in association with native bismuth and tin-ores. Other localities are known; for instance, Brandy Gill in Caldbeck Fells, Cumberland, where with molybdenite and apatite it is embedded in white quartz. The mineral was known to A. Cronstedt in 1758, and was named bismuthine by F. S. Beudant in 1832.") David Brooks (talk) 00:44, 31 January 2009 (UTC)[reply]

OK; that seems to be bismuthinite, which EB1911 gives as a synonym, but the specific gravity is off. David Brooks (talk)

Crystal system

Bismutite crystalises in the tetragonal crystal system
Bismuthinite crystalises in the orthorhombic crystal system
Schumann, Walter (1991). Mineralien aus aller Welt. BLV Bestimmungsbuch (2 ed.). p. 223. ISBN 3-405-14003-X.
ok my ref seems wrong
--Chris.urs-o (talk) 11:52, 26 November 2010 (UTC)[reply]

Most older refs place bismutite in the tetragonal system, but the Grice 2002 paper solved the confusion - interesting technical read. Vsmith (talk) 18:02, 26 November 2010 (UTC)[reply]