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A New Model for the Pollucite Thermal Expansion Mechanism
Author(s) -
Kobayashi Hidehiko,
Yanase Ikuo,
Mitamura Takashi
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03104.x
Subject(s) - thermal expansion , aluminosilicate , rietveld refinement , atmospheric temperature range , powder diffraction , crystallography , materials science , crystal structure , thermal , diffraction , tetrahedron , mineralogy , chemistry , thermodynamics , composite material , physics , optics , catalysis , biochemistry
The thermal expansion behavior of cubic pollucite (CsAlSi 2 O 6 ) in the temperature range 298 to 1473 K was investigated from the viewpoint of crystal structure, based on the model proposed in this study, with Rietveld analysis and high‐temperature X‐ray powder diffraction. Consequently, it has been found that the CsAlSi 2 O 6 structure provides an enlargement‐contraction mechanism for two kinds of rings, each composed of six (Si,Al)O 4 tetrahedra in a three‐dimensional aluminosilicate framework, in the temperature range 298 to 673 K.