Citation: Higgins, J. B.; Ribbe, P. H. (1979). A neutron and x-ray diffraction study of (Mg-Al)VI and (Si-Al)IV ordering monoclinic sapphirine Locality: Bekily, Madagasgar Note: Data from x-ray diffraction, known as sapphirine II. Contributions to Mineralogy and Petrology, 68, pp. 357-368.