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Structural studies on heat-treated pyrophyllite mineral by scanning electron microscopy (1988)

Amritphale, S. S. ; Patel, M.

New York, NY [u.a.] : Wiley-Blackwell

X-Ray Spectrometry 17 (1988), S. 181-185

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ISSN: 0049-8246

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Physics

Notes: Pyrophyllite was heat treated up to 1000°C in the presence of fluxes such as Li2CO3, Na2CO3, K2CO3 and CaCO3 and the products were examined by scanning electron microscopy (SEM). It is shown that the surface morphology of the mineral varies with both temperature and flux. The dehydroxylation reaction in the mineral commences at 500°C and continues above 900°C. Dehydroxylated phases are observed even at 950-1000°C. The formation of free Al2O3, cristobalite, mullite and other phases from pyrophyllite was detected by the SEM examination.

Additional Material: 19 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/xrs.1300170505

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