How Much Water Does Calcined Gypsum Contain?

Ordered water: Gypsum has been used for construction for millennia. The structure and water content of calcined gypsum, CaSO₄·0.5 H₂O, has been under discussion until now: single-crystal structure analysis (see picture: S yellow, Ca gray, O blue, H red) provides an ordered model that is confirmed by...

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Published inAngewandte Chemie (International ed.) Vol. 48; no. 19; pp. 3520 - 3524
Main Authors Weiss, Horst, Bräu, Michael F
Format Journal Article
LanguageEnglish
Published Weinheim Wiley-VCH Verlag 01.01.2009
WILEY‐VCH Verlag
Subjects
bassanite
calcium sulfate
gypsum
structure elucidation
twinning
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Summary:Ordered water: Gypsum has been used for construction for millennia. The structure and water content of calcined gypsum, CaSO₄·0.5 H₂O, has been under discussion until now: single-crystal structure analysis (see picture: S yellow, Ca gray, O blue, H red) provides an ordered model that is confirmed by DFT calculations.
Bibliography:http://dx.doi.org/10.1002/anie.200900726
2
We thank the company KNAUF for a sample of CaSO
0.5 H
4
O and also Dr. Manfred Zabel, University of Regensburg, for the time at the single‐crystal diffractometer.
ObjectType-Article-1
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ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200900726