Botryogen is a hydrous magnesium sulfate mineral with formula: MgFe3+(SO4)2(OH)·7H2O. It is also known as quetenite. It crystallizes in the monoclinic prismatic system and typically occurs as vitreous bright yellow to red botryoidal to reniform masses and radiating crystal prisms. Its specific gravity is 2 to 2.1 and its Mohs hardness is 2. It oc...
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http://en.wikipedia.org/wiki/Botryogen
• (n.) A hydrous sulphate of iron of a deep red color. It often occurs in botryoidal form.
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http://thinkexist.com/dictionary/meaning/botryogen/
Bot'ry·o·gen noun [ Greek
... cluster of grapes +
-gen .]
(Min.) A hydrous sulphate of iron of a deep red color. It often occurs in botryoidal form.
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http://www.encyclo.co.uk/webster/B/83
Botryogen is a hydrous sulphate of iron of a deep red colour. It often occurs in botryoidal form.
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http://www.probertencyclopaedia.com/browse/HB.HTM
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