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Talc and Ground Soapstone

Engel, A. E. J. (1949) Talc and Ground Soapstone. In: Industrial Minerals and Rocks. American Institute of Mining and Metallurgical Engineers , New York, NY, pp. 1018-1041.

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Industrial talcs and ground soapstones both include earth materials of different chemical and mineral compositions. In general, the industrial talcs are composed of silicates that contain appreciable amounts of magnesia. Generally talc, the mineral, is a predominant or at least common constituent. Talc, the mineral, is a hydrous magnesium silicate, with a suggested theoretical formula H₂Mg₃(SiO₃)₄ or H₂O.3MgO.4SiO₂, which postulates 63.5 pct SiO₂, 31.7 pct MgO, and 4.8 pct H₂O. Actually different single grains or leaves of pure talc have variations in water content ranging from 3.5 pct to more than 7 pct, as well as slight differences in the proportions of MgO and SiO₂.

Item Type:Book Section
Additional Information:© 1949 A.I.M.E.
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Caltech Division of Geological Sciences502
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ID Code:114643
Deposited By: Tony Diaz
Deposited On:06 May 2022 16:20
Last Modified:06 May 2022 16:20

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