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Chemical variations in members of the fergusonite-formanite series

Published online by Cambridge University Press:  14 March 2018

J. R. Butler
Affiliation:
Imperial College, South Kensington, London, S.W. 7
Rosemary Hall
Affiliation:
Imperial College, South Kensington, London, S.W. 7

Summary

Attention is drawn to anomalies in the nomenclature of the niobatetantalates, and the fergusonite series as used by Dana is renamed the fergusonite-formanite series. Chemical variations in this series are discussed with particular reference to H2O, Ca, Ti, Yt, individual lanthanons, Th, and U. Members of the series usually show heavy lanthanons exceeding light lanthanons but one specimen shows high Gd+Tb+Dy.

Type
Research Article
Copyright
Copyright © 1960, The Mineralogical Society

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