Simpsonite and Stibiotantalite from Benson Pegmatite Mine, Mtoko, Southern Rhodesia

O. von Knorring and G. Hornung
Research Institute of African Geology, Department of Geology, University of Leeds

Summary: A new occurrence of the tantalum minerals simpsonite and stibiotantalite is described from a lithium pegmatite at Mtoko, Southern Rhodesia. Optical, chemical, and powder X-ray data are given and the formula of simpsonite is considered; a new formula is proposed.

Mineralogical Magazine; June 1963 v. 33; no. 261; p. 458-466; DOI: 10.1180/minmag.1963.033.261.03
© 1963, The Mineralogical Society
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