Thermal decomposition of peisleyite: a thermogravimetry and hot stage Raman spectroscopic study
Frost, Ray L., Mills, Stuart J., & Erickson, Kristy L. (2004) Thermal decomposition of peisleyite: a thermogravimetry and hot stage Raman spectroscopic study. Thermochimica Acta, 419(1-2), pp. 109-114.
High resolution thermogravimetric analysis coupled with a gas evolution mass spectrometer was used to study the decomposition of peisleyite Na3 Al16(SO4)(PO4)10(OH)17•20H2O. Peisleyite, a hydrated hydroxylated multianion mineral, shows thermal decomposition in 5 stages, indicative of a loss of water, hydroxyl units and sulphate. Thermal analysis shows the loss of water and hydroxyl units occurs in 3 distinct stages; at 36 degrees Celsius, 105 degrees Celsius and 162 degrees Celsius. The high resolution thermogravimetry was complimented with hot stage Raman spectroscopy, which follows the dehydration of peisleyite. This dehydration can be followed by the decrease in intensity of the OH stretching vibrations which occur between 4000 and 2500cm-1 and by the shift in the sulphate and phosphate peaks which occur due to changes in the mineral structure.
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|Item Type:||Journal Article|
|Additional Information:||Note: Co-author Stuart Mills is affiliated with Geosciences, Museum Victoria & CSIRO|
|Keywords:||peisleyite, sulphate, phosphate, high resolution thermogravimetric analysis, hot stage Raman spectroscopy, Tom’s phosphate quarry|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
|Copyright Owner:||Copyright 2004 Elsevier|
|Copyright Statement:||Reproduced in accordance with the copyright policy of the publisher.|
|Deposited On:||14 Mar 2005|
|Last Modified:||29 Feb 2012 13:04|
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