Euclase
1089326
181963900
2008-01-03T21:52:50Z
PixelBot
5570079
robot Adding: [[de:Euklas]]
[[Image:Euclase_1.jpg|thumb|200px|Euclase, [[Brazil]]]]
[[Image:Euclase.jpg|thumb|200px|Euclase, [[Brazil]]]]
'''Euclase''' is a [[beryllium]] [[aluminium]] [[hydroxide]] [[Silicate minerals|silicate]] mineral (BeAlSiO<sub>4</sub>(OH)). It crystallizes in the [[monoclinic]] [[crystal system]] and is typically massive to fibrous as well as in slender prismatic crystals. It is related to [[beryl]] (Be<sub>3</sub>Al<sub>2</sub>Si<sub>6</sub>O<sub>18</sub>) and other beryllium minerals. It is a product of the decomposition of beryl in [[pegmatite]]s.
It was first reported in 1792 from the Orenburg district in the southern [[Urals]], [[Russia]]. Its [[Type locality (geology)|type locality]] is Ouro Prêto, [[Minas Gerais]], Southeast Region, [[Brazil]].
==References==
*[http://webmineral.com/data/Euclase.shtml Webmineral data]
*[http://www.mindat.org/min-1418.html Mindat with location data]
*[http://rruff.geo.arizona.edu/doclib/hom/euclase.pdf Mineral Data Publishers PDF]
[[Category:Silicate minerals]]
[[Category:Beryllium minerals]]
{{mineral-stub}}
[[de:Euklas]]
[[nl:Euklaas]]
[[ru:Эвклаз]]