Two Varieties of Lithiophorite in Some Australian Deposits

J. Ostwald
The Broken Hill Proprietary Company Limited, Central Research Laboratories, Shortland, NSW, Australia

Abstract: Electron probe microanalyses carried out on thirty areas of lithiophorite (Al,Li)MnO2(OH)2 from five Australian localities indicate wide variations in its Ni, Co, Cu, and Zn content. The concentration of these elements varies inversely with the alumina content, though there is a marked change in their concentration at 18% alumina, suggesting the existence of two varieties of lithiophorite with differing concentration of transition elements. EPMA line scans also indicate definite changes in Co content in lithiophorite grains less than 0.2 mm in dimension. The variations in alumina and transition elements may be explained if lithiophorite is considered to be an irregular mixed-layer-lattice intergrowth of pure lithiophorite with members of the recently discovered asbolane-type minerals.

Mineralogical Magazine; September 1984 v. 48; no. 348; p. 383-388; DOI: 10.1180/minmag.1984.048.348.08
© 1984, The Mineralogical Society
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