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Start Over Author "Kinast, A." Region paraiba (brazil : state)
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1. A new approach for the determination of multiple cation locations and ordering, using the example of natural and heat-treated columbites.

Author

Kinast, E. J., Isnard, O., da Cunha, J. B. M., de Vasconcellos, M. A. Z., and dos Santos, C. A.

Subjects
*CATIONS, *PEGMATITES, *POLYCRYSTALS
Abstract

The article discusses a study of the crystal structure and degree of cation order of a natural AB2O6 columbite-type compound and derivatives. The polycrystalline pieces of columbite used in the study were from the Borborema pegmatite in Paraiba, Brazil. The order-disorder transitions were observed via the Mössbauer spectroscopy technique. Results show that oxidation can change the columbite phase into the wodginite type.

Published
2011
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