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Forman and Peacock give a completely different forumula and cite other sources that contradict the article. — Preceding unsigned comment added by 67.138.85.162 ( talk) 21:28, 17 August 2012 (UTC) reply

Don't know 'bout Forman and Peacock, but I've added an alternate formula sourced to the Handbook of Mineralogy. Vsmith ( talk) 01:15, 18 August 2012 (UTC) reply

RRUFF Database: Cu_(2.64-3.00)Te₂

Ford W E (1903) Rickardite, a new mineral, The American Journal of Science 165, 69-70

The chemical formula didn't get a revision later on.

Well, mindat.org cites: Forman, S.A.; Peacock, Martin Alfred (1949). American Mineralogist. 34: 441–451 http://www.minsocam.org/ammin/AM34/AM34_441.pdf. {{ cite journal}}: Missing or empty |title= ( help), Acta Crystallographica: B49: 398-403, Mineralogical Journal (Japan) (1973): 7: 252. -- Chris.urs-o ( talk) 02:25, 18 August 2012 (UTC) reply

We follow Rruff database/ IMA -- Chris.urs-o ( talk) 11:36, 25 January 2013 (UTC) reply