gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1951.029.215.02 X-ray Determination of Centrosymmetry in three Felspars1 Bailey S. W. Ferguson R. B. Taylor W. H. Crystallographic Laboratory, Cavendish Laboratory, Cambridge

The substance of this paper was presented briefly during discussion at a special meeting of the Mineralogical Society devoted to felspars, May 16, 1951.

 12 1951 29 215 759 764 Copyright © 1951, The Mineralogical Society 1951 Summary

Three statistical tests, depending upon the probability distribution of X-ray intensities, have been applied to orthoclase, sanidine, and albite. It is concluded that these three felspars posses centres of symmetry, justifying the assumption of holohedral symmetry made in earlier structure analyses.