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Luobusaite: A New Mineral

Luobusaite: A New Mineral Abstract: A group of mantle minerals including about 70–80 subtypes of minerals are discovered from a podiform chromitite in Tibet, China. Recovered minerals include diamond, coesite, moissanite, wustite, Fe‐silides and a new mineral, luobusaite. All of these minerals were hand‐picked from heavy‐mineral separates of the podiform chromitite in the mantle peridotite of an ophiolite. The grains of luobusaite are as host mineral with inclusions of native silicon or as an intergrowth with native silicon and Fe‐Si phase. Luobusaite occurs as irregular grains, with 0.1–0.2 mm in size, consisting of very finegrained aggregates. The mineral is steel‐grey in color, metallic luster, and opaque. The empirical formula (based on 2 for Si) is Fe0.83Si2, according to the chemical compositions of luobusaite. X‐ray powder‐diffraction data: orthorhombic system, space group Cmca, a = 9.874 (14) Å, b = 7.784 (5) Å, c = 7.829(7) Å, Z=16. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Geologica Sinica (English Edition) Wiley

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References (10)

Publisher
Wiley
Copyright
2006 Geological Society of China
ISSN
1000-9515
eISSN
1755-6724
DOI
10.1111/j.1755-6724.2006.tb00289.x
Publisher site
See Article on Publisher Site

Abstract

Abstract: A group of mantle minerals including about 70–80 subtypes of minerals are discovered from a podiform chromitite in Tibet, China. Recovered minerals include diamond, coesite, moissanite, wustite, Fe‐silides and a new mineral, luobusaite. All of these minerals were hand‐picked from heavy‐mineral separates of the podiform chromitite in the mantle peridotite of an ophiolite. The grains of luobusaite are as host mineral with inclusions of native silicon or as an intergrowth with native silicon and Fe‐Si phase. Luobusaite occurs as irregular grains, with 0.1–0.2 mm in size, consisting of very finegrained aggregates. The mineral is steel‐grey in color, metallic luster, and opaque. The empirical formula (based on 2 for Si) is Fe0.83Si2, according to the chemical compositions of luobusaite. X‐ray powder‐diffraction data: orthorhombic system, space group Cmca, a = 9.874 (14) Å, b = 7.784 (5) Å, c = 7.829(7) Å, Z=16.

Journal

Acta Geologica Sinica (English Edition)Wiley

Published: Oct 1, 2006

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