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Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

Year

2005
2002

Authors

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All

Somani, O. P.

Tantalum in TIN Slag - A Report from Bastar Pegmatite Belt, Chattisgarh, India

Tantalum in Tin Slag-A Report from Bastar Pegmatite Belt

X-Ray Powder Diffractometry and Electron Microprobe Study of Partially Disordered Wodginites from Challanpara Pegmatite, Bastar District, Chattisgarh

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Authors

E. V. S. S. K. Babu ¹, O. P. Somani ¹, R. Viswanathan ¹, R. P. Sinha ¹

Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 59, No 3 (2002), Pagination: 201-212

Abstract

The wodginite group of minerals occur in the Challanpara pegmatite, Bastar District, Chattisgarh. Nearly pure wodginite fractions were obtained by heavy liquid and electromagnetic separation. The mineral fractions havc been studied by X-ray powder diffractometiy and electron-microprobe analysis. Challanpara wodginite deviates from ideal formula MnSnTa₂0₈, or ABC₂O₈ by extensive substitutions at the B site. The Challanpara wodginites also host small hut significant amounts of Zr, W and traces of U. X-ray diffraction study indicates that these wodginites show partial cation disorder.. Upon heating the samples to ∼950°C, cell parameters such as interaxial angle P and cell volume showed notable changes suggesting partial ordering of the crystal structure. 'The calculated index of order (Δ) varies in a narrow range from 0.40 to 0.41 suggesting that the examined phases are "partially disordered wodginites".

Keywords

Wodginite, Pegmatite, X-Ray diffraction, Electron microprobe, Challanpara, Bastar, Chattisgarh.

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