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Tannic acid induced penetration twinning in gel‐grown calcium sulfate dihydrate
Author(s) -
Cody R. D.,
Cody A. M.
Publication year - 1988
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170231203
Subject(s) - tannic acid , gypsum , calcium , crystal twinning , chemistry , bentonite , penetration (warfare) , sulfate , inorganic chemistry , mineralogy , chemical engineering , nuclear chemistry , materials science , crystallography , organic chemistry , metallurgy , microstructure , engineering , operations research
Well‐formed calcium sulfate dihydrate penetration twins with twin plane a(100) are induced by the presence of gallotannic acid under alkaline conditions in bentonite clay gel. These twin closely resemble natural gypsum that occurs in alkaline desert soils.