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VARIABLE ATMOSPHERE DTA IN IDENTIFICATION AND DETERMINATION OF ANHYDROUS CARBONATE MINERALS IN SOILS
Author(s) -
WARNE S. St. J.,
MITCHELL B. D.
Publication year - 1979
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1979.tb00969.x
Subject(s) - anhydrous , carbonate , carbonate minerals , carbon dioxide , mineral , mineralogy , decomposition , atmosphere (unit) , soil water , chemistry , environmental chemistry , geology , soil science , organic chemistry , physics , thermodynamics
Summary The value of modem commercial DTA equipment in the identification and determination of anhydrous carbonate minerals can be greatly improved by incorporating a controlled‐atmosphere (carbon dioxide) technique. The unproved peak definition and increased height enables the detection of carbonate minerals at concentrations of the order of 0.25 per cent by weight in a 50 mg sample. Further, the related changes in temperature of the decomposition reaction peaks provide additional information for the identification of carbonate mineral reactions. The method has particular application in mineralogical and pedological investigations.