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Keilhauite

From Wikipedia, the free encyclopedia

Keilhauite
A rare crystal of keilhauite from the type locality in Bø, Tromøysund, Arendal, Aust-Agder, Norway
General
CategorySilicate mineral
Formula
(repeating unit)		(CaTi,Al2,Fe3+2,Y3+2)SiO5

Keilhauite (also known as yttrotitanite) is a variety of the mineral titanite of a brownish black color, related to titanite in form. It consists chiefly of silicon dioxide, titanium dioxide, calcium oxide, and yttrium oxide. The variety was described in 1841 and named for Baltazar Mathias Keilhau (1797–1858) a Norwegian geologist.[1]

Keilhauite has a chemical formula of (CaTi,Al2,Fe3+2,Y3+2)SiO5. It differs from titanite only in that calcium is substituted by up to 10 percent (Y,Ce)2O3.[1]

References

  1. ^ a b Keilhauite on Mindat


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This page was last edited on 15 January 2022, at 18:18
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