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Abstract
It has been effectued a semicuantitative mineralogical analysis of 12 dusting powder talc to topic use. These samples were selected asmore representative of these products procedents from several spanish chemists. The content of tale is compressed· beneath 70 and 95 %., with an average content of 85,2% . The medium tale content several impurities with following quantities: 2,7 % of chlorite, 3,3 % of calcite, 1,5 % of dolomite, 1 % of amphiboles, 0,72 % of quartz and 3,4 % of kaolinite.
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