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Raman spectroscopy of synthetic CaHPO 4 ·2H 2 O– and in comparison with the cave mineral brushite
Author(s) -
Frost Ray L.,
Xi Yunfei,
Pogson Ross E.,
Millar Graeme J.,
Tan Keqin,
Palmer Sara J
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.3063
Subject(s) - brushite , raman spectroscopy , mineral , mineralogy , cave , chemistry , hydrogen phosphate , materials science , calcium , phosphate , optics , archaeology , physics , organic chemistry , history
The mineral brushite has been synthesised by mixing calcium ions and hydrogen phosphate anions to mimic the reactions in caves. The vibrational spectra of the synthesised brushite were compared with that of the natural cave mineral. Bands attributable to the PO 4 3– and HPO 4 2– anions are observed. Brushite, both synthetic and natural, is characterised by an intense sharp band at 985 cm −1 with a shoulder at 1000 cm −1 . Characteristic bending modes are observed in the 300 to 600 cm −1 region. The spectra of the synthesised brushite matches very well the spectrum of brushite from the Moorba Cave, Western Australia. Copyright © 2011 John Wiley & Sons, Ltd.