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Barioperovskite, BaTiO3, a new mineral from the Benitoite Mine, California
-
Chi Ma
and
George R. Rossman
Published/Copyright:
April 1, 2015
Abstract
Barioperovskite, ideally BaTiO3, is a new member of the perovskite group. It is found as micro- to nano-crystals in a host of amorphous material contained within hollow, tubular inclusions in benitoite from the Benitoite Mine, San Benito County, California, U.S.A. The mean chemical composition determined by electron-microprobe analysis is (wt%) BaO 65.46, TiO2 34.57, SiO2 0.89, sum 100.92. The empirical formula calculated on the basis of 3 O is Ba0.97Ti0.98Si0.03O3. Barioperovskite is orthorhombic, Amm2; a = 3.9874 Å, b = 5.6751 Å, c = 5.6901 Å, V = 128.76 Å3, and Z = 2. The electron backscattered diffraction pattern is an excellent match to that of synthetic BaTiO3 with the Amm2 structure. The strongest calculated X-ray powder diffraction lines from the synthetic BaTiO3 data are [d in Å, (I), hkl] 4.018 (18) (011), 2.845 (30) (002), 2.830 (100) (111), 2.316(20) (102), 2.312 (23) (120), 2.009 (28) (022), 1.640 (17) (113), 1.637 (19) (131), 1.633 (18) (202), and 1.415 (15) (222). The mineral is named after its composition, a Ba-dominant member of the perovskite group.
Keywords: Barioperovskite; new mineral; barium titanate; perovskite group; Benitoite Mine; BaTiO3; BaTi2O5; BaTi3O7
Received: 2007-3-16
Accepted: 2007-9-11
Published Online: 2015-4-1
Published in Print: 2008-1-1
© 2015 by Walter de Gruyter Berlin/Boston
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Keywords for this article
Barioperovskite;
new mineral;
barium titanate;
perovskite group;
Benitoite Mine;
BaTiO3;
BaTi2O5;
BaTi3O7
Articles in the same Issue
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- Chemical and physical transfers in an ultramafic rock weathering profile: Part 1. Supergene dissolution of Pt-bearing chromite
- Chemical and physical transfers in an ultramafic rock weathering profile: Part 2. Dissolution vs. accumulation of platinum group minerals
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- Metamorphic vanadian-chromian silicate mineralization in carbon-rich amphibole schists from the Malé Karpaty Mountains, Western Carpathians, Slovakia
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