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Crystal structure and thermal behavior of Bi6 Te2 O15 : investigation of synthetic and natural pingguite

Citation

Nenert, G and Missen, OP and Lian, H and Weil, M and Blake, GR and Kampf, AR and Mills, SJ, Crystal structure and thermal behavior of Bi6 Te2 O15 : investigation of synthetic and natural pingguite, Physics and Chemistry of Minerals, (47) Article 53. ISSN 1432-2021 (2020) [Refereed Article]


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PDF (Characterisation of natural and synthetic pingguite, a bismuth tellurate mineral found in oxidation zone of mineral deposits and potentially in oxidation of thermoelectric devices.)
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DOI: doi:10.1007/s00269-020-01121-7

Abstract

The previously unknown crystal structure of pingguite was determined and refned from laboratory X-ray powder difraction data using a synthetic sample. Additional single crystal difraction of natural pingguite confrms that the crystal structure of the synthetic sample is identical to the natural mineral. This new crystal structure calls for a revised chemistry of the rare mineral pingguite to Bi6Te2O15 instead of the previously reported formula Bi6Te2O13. Pingguite contains TeVI only and not TeIV as previously reported. Pingguite undergoes an irreversible phase transition around 840 ◦C which is characterized by a loss of oxygen and a reduction from TeVI to TeIV resulting in a 훿-Bi2O3 like type structure. In addition, we report the Raman spectroscopic data on the natural pingguite.

Item Details

Item Type:Refereed Article
Keywords:Pingguite; Tellurate; Crystal structure; High-temperature transformation; Blue Bell, California,USA
Research Division:Earth Sciences
Research Group:Geology
Research Field:Mineralogy and crystallography
Objective Division:Mineral Resources (Excl. Energy Resources)
Objective Group:Other mineral resources (excl. energy resources)
Objective Field:Other mineral resources (excl. energy resources) not elsewhere classified
UTAS Author:Missen, OP (Dr Owen Missen)
ID Code:154968
Year Published:2020
Web of Science® Times Cited:3
Deposited By:CODES ARC
Deposited On:2023-01-20
Last Modified:2023-01-25
Downloads:0

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