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Crystal Growth in Gels at Elevated Pressures: The Upper Limit of Temperature for Metastable Formation of Aragonite
Author(s) -
Franke Walter A.,
Mehran NosratAga
Publication year - 1992
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.2170270302
Subject(s) - aragonite , metastability , precipitation , diffusion , crystallography , atmospheric temperature range , materials science , crystal growth , calcium carbonate , mineralogy , crystal (programming language) , diffraction , chemistry , calcite , chemical engineering , thermodynamics , optics , composite material , organic chemistry , physics , meteorology , computer science , programming language , engineering
Both rapid precipitation and diffusion controlled gel growth were applied to crystallize calcium carbonate at temperatures in the range of 100 °C to 270 °C. The amount of aragonite was determined by means of X‐ray diffraction data. The morphology of the aragonite crystals are described. Metastable formation of aragonite was observed only at temperatures below 270 °C.