Psilomelane from India

Bibhuti Mukherjee
Geological Survey of India, Calcutta

Summary: Mukherjee's definition of psilomelane, A3X6Mn8O16 of orthorhombic symmetry with the space group P222 and the dimensions determined for a single crystal of the Schneeberg sample, is found true for the psilomelane from Ratanpur, India. The indexing of powder data of the Ratanpur sample with the orthorhombic axes a 9·45, b 13·90, c 5·72 Å is most satisfactory.

Mineralogical Magazine; September 1966 v. 35; no. 275; p. 971-974; DOI: 10.1180/minmag.1966.035.275.09
© 1966, The Mineralogical Society
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