Low-temperature dehydration of gypsum single crystals

On the basis of the analysis of the electron spin resonance spectrum of the SO 3 − radical ion, it is established that the transformation of gypsum (CaSO 4 · 2H 2 O) into bassanite (CaSO 4 · 0.5H 2 O) with partial removal of water molecules occurs through the formation of an anhydrous metastable pha...

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Bibliographic Details
Published in:Crystallography reports 2008-09, Vol.53 (5), p.806-811
Main Authors: Khasanov, R. A., Nizamutdinov, N. M., Khasanova, N. M., Gubaĭdullin, A. T., Vinokurov, V. M.
Format: Article
Language:English
Subjects:
CALCIUM SULFATES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystallography and Scattering Methods
DEHYDRATION
ELECTRON SPIN RESONANCE
GYPSUM
IONS
Lattice Dynamics and Phase Transitions
MONOCRYSTALS
Physics
Physics and Astronomy
RADICALS
RECRYSTALLIZATION
SPECTRA
WATER
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Summary:On the basis of the analysis of the electron spin resonance spectrum of the SO 3 − radical ion, it is established that the transformation of gypsum (CaSO 4 · 2H 2 O) into bassanite (CaSO 4 · 0.5H 2 O) with partial removal of water molecules occurs through the formation of an anhydrous metastable phase. This phenomenon, reflecting the processes of recrystallization of materials of this class, serves as the scientific basis for the production of binders from sulfate mineral associations.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774508050143