Journal
PHYSICS AND CHEMISTRY OF MINERALS
Volume 34, Issue 10, Pages 699-704Publisher
SPRINGER
DOI: 10.1007/s00269-007-0186-2
Keywords
anhydrite; CaSO4; thermal behaviour; X-ray powder diffraction; rietveld method
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d The thermal behaviour of beta-anhydrite CaSO4 has been investigated to 1,263 K in-situ real-time using laboratory parallel-beam X-ray powder diffraction data. The cell parameters expanded anisotropically, the c axis being the softest. This behaviour is due to the deformation of the CaO8 polyhedron. In fact the two longest, independent, Ca-O bond distances show a significant component along the z direction.
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