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andalusite

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
an·da·lu·site  (nd-lst)
n.
A mineral, aluminum silicate (Al2SiO5), usually found in orthorhombic crystals of various colors.
[After Andalusia.]
andalusite [ˌændəˈluːsaɪt]
n
(Earth Sciences / Minerals) a grey, pink, or brown hard mineral consisting of aluminium silicate in orthorhombic crystalline form. It occurs in metamorphic rocks and is used as a refractory and as a gemstone. Formula: Al2SiO5
andalusite  (nd-lst)
A hard, grayish white to pinkish brown orthorhombic mineral. Andalusite occurs as nearly square prisms, often with cross-shaped cross sections, in metamorphic rocks. It is a polymorph of kyanite and sillimanite, but forms at shallower depths than they do, and at higher temperatures than kyanite and lower temperatures than sillimanite. Chemical formula: Al2SiO5.


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? Mentioned in ? References in periodicals archive
 
The metamorphosed alteration zones are characterized by the presence of various combinations of anthophyllite, cordierite, garnet, staurolite, biotite and/ or andalusite.
Government geoscience stimulates mineral exploration in the superior ... by Simard, Martin / Geoscience Canada
Sikaman has also signed a Heads of Agreement whereby it can acquire a 100 percent interest in the producing Hoogenoeg Andalusite mine in the Transvaal region of South Africa.
SIKAMAN INCREASES INTEREST IN NEUQUEN RIVER & CERRO MAYAL PROJECTS by Business Wire
It is proposed that Enro and its partners will sell to Sikaman no less than 75 percent and up to a 100 percent interest in Hoogenoeg Andalusite Pty.
SIKAMAN ENTERS INTO AN AGREEMENT TO PURCHASE PRODUCING MINE by Business Wire
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