Mr. E. J. Wayland and Dr. L. J. Spencer: Bismutotantalite, a new mineral from Uganda. This was found in a pegmatite vein at Gamba Hill, about 35 miles N. W. of Entebbe. The large rough crystals, weighing up to a kilogram or more, are orthorhombic with a habit and axial ratios similar to those of columbite. Analyses made by Mr. W. O. R. Wynn at the Imperial Institute give the formula Bi2O3 · Ta2O5, analogous to stibiotantalite (Sb2O3 · Ta2O5).

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.