Vibrational Spectroscopy of Natural Cave Mineral Monetite CaHPO4 and the Synthetic Analog

Monetite is a phosphate mineral formed by the reaction of the chemicals in bat guano with calcite substrates and is commonly found in caves. The analog of the mineral monetite CaHPO 4 has been synthesized and the Raman and infrared spectra of the natural monetite originating from the Murra-el-elevyn...

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Published inSpectroscopy letters Vol. 46; no. 1; pp. 54 - 59
Main Authors Frost, Ray L., Xi, Yunfei, Millar, Graeme, Tan, Keqin, Palmer, Sara J.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.01.2013
Subjects
"cave" minerals
Bands
brushite
hydrogen phosphate
monetite
Raman spectroscopy
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Summary:Monetite is a phosphate mineral formed by the reaction of the chemicals in bat guano with calcite substrates and is commonly found in caves. The analog of the mineral monetite CaHPO 4 has been synthesized and the Raman and infrared spectra of the natural monetite originating from the Murra-el-elevyn Cave, Eucla, Western Australia, compared. Monetite is characterized by a complex set of phosphate bands that arise because of two sets of pairs of phosphate units in the unit cell. Raman and infrared bands are assigned to , OH stretching and bending vibrations. Infrared bands at 1346 and 1402 cm −1 are assigned to POH deformation modes. Vibrational spectroscopy confirms the presence of monetite in the cave system.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0038-7010
1532-2289
DOI:10.1080/00387010.2012.663852