title: Vibrational spectroscopic analysis of the mineral crandallite CaAl3(PO4)2(OH)5·(H2O) from the Jenolan Caves, Australia.
abstract: The mineral crandallite CaAl(3)(PO(4))(2)(OH)(5)·(H(2)O) has been identified in deposits found in the Jenolan Caves, New South Wales, Australia by using a combination of X-ray diffraction and Raman spectroscopic techniques. A comparison is made between the vibrational spectra of crandallite found in the Jenolan Caves and a standard crandallite. Raman and infrared bands are assigned to PO(4)(3-) and HPO(4)(2-) stretching and bending modes. The predominant features are the internal vibrations of the PO(4)(3-) and HPO(4)(2-) groups. A mechanism for the formation of crandallite is presented and the conditions for the formation are elucidated.
authors.affiliation: Chemistry Discipline, Faculty of Science and Technology, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia. r.frost@qut.edu.au
authors.forename: Ray L
authors.initials: RL
authors.lastname: Frost
authors.forename: Yunfei
authors.initials: Y
authors.lastname: Xi
authors.forename: Sara J
authors.initials: SJ
authors.lastname: Palmer
authors.forename: Ross
authors.initials: R
authors.lastname: Pogson
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D000818:Animals; D001315:Australia; D002118:Calcium / Q000737:chemistry*; D059552:Caves; D002685:Chiroptera; D005243:Feces; D008903:Minerals / Q000737:chemistry; D008956:Models, Chemical; D010758:Phosphorus / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*; D013055:Spectrophotometry, Infrared / Q000379:methods; D013059:Spectrum Analysis, Raman / Q000379:methods; D014732:Vibration; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D008903:Minerals; D014867:Water; D010758:Phosphorus; D000535:Aluminum; D002118:Calcium