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THE EFFECT OF ORIENTATIONAL DISORDER OF THE ANION IN CALCITE ON THE ARAGONITE (Pmcn) CALCITE (R3c) EQUILIBRIUMvr

✍ Scribed by Mulder, W. H.; Hassan, I.


Book ID
121865578
Publisher
Mineralogical Association of Canada
Year
2011
Tongue
English
Weight
758 KB
Volume
49
Category
Article
ISSN
0008-4476

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Neutron powder diffraction measurements of the temperature dependence of superlattice reflections in calcite have shown that there is a continuous phase transition at 1260 K. The change in space group symmetry (R3c~R3m) and the halving of the unit cell size on heating indicate that this transition i