Quartz: structural and thermodynamic analyses across the α ↔ β transition with origin of negative thermal expansion (NTE) in β quartz and calcite

The temperature variation, T, of the crystal structure of quartz, SiO2, from 298 to 1235 K was obtained with synchrotron powder X‐ray diffraction data and Rietveld structure refinements. The polymorphic transformation from P3221 (low‐T, α quartz) to P6222 (high‐T, β quartz) occurs at a transition te...

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Veröffentlicht in:	Acta crystallographica Section B, Structural science, crystal engineering and materials Structural science, crystal engineering and materials, 2016-04, Vol.72 (2), p.249-262
1. Verfasser:	Antao, Sytle M.
Format:	Artikel
Sprache:	eng
Schlagworte:	high-temperature studies Landau theory MATERIALS SCIENCE negative thermal expansion (NTE) quartz Rietveld refinement thermodynamic modeling
Online-Zugang:	Volltext
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