Oriented Transformation of Manganite During Heat Treatment

D. R. Dasgupta
Senior Mineralogist, Geological Survey of India, 29 Chowringhee, Calcutta—16, India

Summary: The transformation of manganite during heating has been studied by single crystal X-ray diffraction methods. It is observed that manganite transforms into pyrolusite keeping its original axial directions parallel to those of the transformed phase. Pyrolusite then transforms into Mn2O3 with its [001] ‖ [110] or [100] of Mn2O3; [100] ‖ [1¯10] or [010] of Mn2O3 and [010] ‖ [001] of Mn2O3. Evidence of an intermediate product in the pyrolusite → Mn2O3 reaction has been found.

Mineralogical Magazine; March 1965 v. 35; no. 269; p. 131-139; DOI: 10.1180/minmag.1965.035.269.15
© 1965, The Mineralogical Society
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