On Bultfonteinite, a New Fluorine-Bearing Hydrous Calcium Silicate from South Africa
John Parry1, Alpheus F. Williams and F. E. Wright
chemical study, De Beers Consolidated Mines, Kimberley, Union of South Africa
crystallographical and optical study, Geophysical Laboratory, Carnegie Institution of Washington, D.C.
1Mr. John Parry, Chief Chemist of the De Beers Consolidated Mines at Kimberley, died on October 6, 1931.