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A Raman spectroscopic study of the ‘cave’ mineral ardealite Ca2(HPO4)(SO4)•4H2O

By Ray L. Frost, Sara J. Palmer, Dermot A. Henry and Ross Pogson

Abstract

The mineral ardealite Ca2(HPO4)(SO4)•4H2O is a ‘cave’ mineral and is formed through the reaction of calcite with bat guano. The mineral shows disorder and the composition varies depending on the origin of the mineral. Raman spectroscopy complimented with infrared spectroscopy has been used to characterise the mineral ardealite. The Raman spectrum is very different from that of gypsum. Bands are assigned to SO42- and HPO42- stretching and bending modes

Topics: 030606 Structural Chemistry and Spectroscopy, Raman spectroscopy, phosphate, sulphate, ardealite
Publisher: John Wiley & Sons
Year: 2011
DOI identifier: 10.1002/jrs.2855
OAI identifier: oai:eprints.qut.edu.au:42037

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