A vibrational spectroscopic study of a hydrated hydroxy-phosphate mineral fluellite, Al2(PO4)F2(OH)·7H2O

Jiří Cejka; Jiří Sejkora; Ivo Macek; Ray L Frost; Andrés López; Ricardo Scholz; Yunfei Xi

doi:10.1016/j.saa.2014.01.116

A vibrational spectroscopic study of a hydrated hydroxy-phosphate mineral fluellite, Al2(PO4)F2(OH)·7H2O

Spectrochim Acta A Mol Biomol Spectrosc. 2014 May 21:126:157-63. doi: 10.1016/j.saa.2014.01.116. Epub 2014 Feb 7.

Authors

Jiří Cejka¹, Jiří Sejkora², Ivo Macek², Ray L Frost³, Andrés López⁴, Ricardo Scholz⁵, Yunfei Xi⁴

Affiliations

¹ Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, CZ-193 00 Praha 9, Czech Republic; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
² Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, CZ-193 00 Praha 9, Czech Republic.
³ School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia. Electronic address: r.frost@qut.edu.au.
⁴ School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
⁵ Geology Department, School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG 35400-00, Brazil.

PMID: 24594888
DOI: 10.1016/j.saa.2014.01.116

Abstract

Raman and infrared spectra of two well-defined fluellite samples, Al2(PO4)F2(OH)·7H2O, from the Krásno near Horní Slavkov (Czech Republic) and Kapunda, South Australia (Australia) were studied and tentatively interpreted. Observed bands were assigned to the stretching and bending vibrations of phosphate tetrahedra, aluminum oxide/hydroxide/fluoride octahedra, water molecules and hydroxyl ions. Approximate O-H⋅⋅⋅O hydrogen bond lengths were inferred from the Raman and infrared spectra.

Keywords: Fluellite; Hydroxyl ions; Infrared spectroscopy; Phosphate; Raman spectroscopy.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Aluminum Hydroxide / analysis
Aluminum Oxide / analysis
Fluorides / analysis
Minerals / chemistry*
Phosphates / analysis
Spectrophotometry, Infrared
Spectrum Analysis, Raman

Substances

Minerals
Phosphates
Aluminum Hydroxide
aluminum oxide hydroxide
Aluminum Oxide
Fluorides