Premium
Structural studies on heat‐treated pyrophyllite mineral by scanning electron microscopy
Author(s) -
Amritphale S. S.,
Patel M.
Publication year - 1988
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300170505
Subject(s) - pyrophyllite , cristobalite , scanning electron microscope , mullite , mineral , mineralogy , materials science , chemistry , analytical chemistry (journal) , crystallography , metallurgy , quartz , composite material , ceramic , chromatography
Pyrophyllite was heat treated up to 1000°C in the presence of fluxes such as Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 and CaCO 3 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 Al 2 O 3 , cristobalite, mullite and other phases from pyrophyllite was detected by the SEM examination.