Changes in the Crystal Morphology of Synthetic Reedmergnerite (NaBSi3O8) During Ordering Experiments

R. A. Mason
Dept. of Geology, The University, Manchester M13 9PL, Great Britain*
*Present address: The University of Chicago, Dept. of the Geophysical Sciences, 5734 S. Ellis Avenue, Chicago, Illinois 60637, USA.

Summary: The morphologies of hydrothermally grown reedmergnerite crystals change systematically with time and rate of change of B, Si order. Three stages in this process are recognized: (1) Growth of well-faceted crystals. (2) Development of etching leading to the formation of irregular grains. (3) Modification of irregular grains to form rounded or ellipsoidal crystals. A solutionreprecipitation process is responsible for the morphological changes and the increase in degree of order of B and Si with time at constant temperature and pressure.

Mineralogical Magazine; September 1980 v. 43; no. 331; p. 905-908; DOI: 10.1180/minmag.1980.043.331.14
© 1980, The Mineralogical Society
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