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Gypsum.

Authors
Davis-LL
Source
Am Ceram Soc Bull 1992 May; 71(5):801-802
Link
NIOSHTIC No.
10011609
Abstract
Gypsum is the most common of the naturally occurring sulfate minerals. It is found in very extensive, bedded sedimentary deposits all over the world and is associated with limestones, shales and sandstones, marls and clays. High-purity deposits of gypsum are relatively common, and, for most uses, little or no beneficiation is required. In the United States most gypsum rock is finely ground and partially calcined to drive off 75 pct of the chemically combined water, converting gypsum, caso4.2H2o, to the hemihydrate product, caso4.1/2H2o. Commonly called plaster of paris, this material quickly sets and hardens back to gypsum when mixed with the appropriate amount of water.
CODEN
ACSBA7
Publication Date
19920501
Document Type
OP;
Fiscal Year
1992
NTIS Accession No.
NTIS Price
Identifying No.
OP 260-92
Issue of Publication
5
ISSN
0002-7812
NIOSH Division
WO;
Source Name
American Ceramic Society Bulletin
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