Botryogen

Botryogen

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 occurs in arid climates as a secondary alteration product of pyrite bearing deposites.

It was first described in 1828 for an occurrence in the Falu mine of Falun, Dalarna, Sweden. It was named for its grape like appearance from Greek "botrys" for bunch of grapes and "genos" to bear.

References

* Palache, C., H. Berman, and C. Frondel (1951) "Dana’s system of mineralogy", (7th edition), v. II, pp. 617–618.
* [http://rruff.geo.arizona.edu/doclib/hom/botryogen.pdf Mineral Data Publishing (PDF)]
* [http://www.mindat.org/min-733.html Mindat with locality data]
* [http://webmineral.com/data/Botryogen.shtml Webmineral data]


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  • botryogen — noun A hydrous magnesium sulfate mineral …   Wiktionary

  • Botryogen — Bot|ry|o|gen* der; s, e <zu gr. bótrys »Weintraube« u. ↑...gen> ein orangerotes Mineral in traubenförmigen ↑Aggregaten …   Das große Fremdwörterbuch

  • botryogen — bot·ry·o·gen …   English syllables

  • botryogen — ˈbä.trēəˌjen noun ( s) Etymology: German, from botry + gen, from Greek genēs born more at gen : a mineral MgFe(SO4)2(OH).7H2O consisting of a hydrous sulfate of iron and magnesium that is deep red or deep yellow and usually botryoid …   Useful english dictionary

  • List of minerals A-B (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia

  • Sulfate minerals — ▪ Table Sulfate minerals name colour lustre Mohs hardness specific gravity alum colourless; white vitreous 2–2½ 1.8 alunite white; grayish, yellowish, reddish, reddish brown vitreous 3½–4 2.6–2.9 alunogen white; yellowish or reddish vitreous to… …   Universalium

  • ботріоген — ботриоген botryogen Botryogen мінерал, водний сульфат магнію та заліза. Склад: Mg Fe3 (SO4)2(OH)*7H2O. Сингонія моноклінна. Призматичні кристали або бруньковидні, гроновидні та сферолітові аґреґати. Тв. 2 2,5. Густина 2,14. Блиск скляний. Колір… …   Гірничий енциклопедичний словник

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