PMID- 15556437 OWN - NLM STAT- MEDLINE DCOM- 20050518 LR - 20131121 IS - 1386-1425 (Print) IS - 1386-1425 (Linking) VI - 61 IP - 1-2 DP - 2005 Jan 1 TI - Peisleyite an unusual mixed anion mineral--a vibrational spectroscopic study. PG - 177-84 AB - The mineral peisleyite has been studied using a combination of electron microscopy and vibrational spectroscopy. Scanning electron microscope (SEM) photomicrographs reveal that the peisleyite morphology consists of an array of small needle-like crystals of around 1 microm in length with a thickness of less than 0.1 microm. Raman spectroscopy in the hydroxyl stretching region shows an intense band at 3506 cm(-1) assigned to the symmetric stretching mode of the OH units. Four bands are observed at 3564, 3404, 3250 and 3135 cm(-1) in the infrared spectrum. These wavenumbers enable an estimation of the hydrogen bond distances 3.052(5), 2.801(0), 2.705(6) and 2.683(6)A. Two intense Raman bands are observed at 1023 and 989 cm(-1) and are assigned to the SO(4) and PO(4) symmetric stretching modes. Other bands are observed at 1356, 1252, 1235, 1152, 1128, 1098 and 1067 cm(-1). The bands at 1067 cm(-1) is attributed to AlOH deformation vibrations. Bands in the low wavenumber region are assigned to the nu(4) and nu(2) out of plane bending modes of the SO(4) and PO(4) units. Raman spectroscopy is a useful tool in determining the vibrational spectroscopy of mixed hydrated multianion minerals such as peisleyite. Information on such a mineral would be difficult to obtain by other means. FAU - Frost, Ray L AU - Frost RL AD - Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, G.P.O. Box 2434, Brisbane, Qld. 4001, Australia. r.frost@qut.edu.au FAU - Mills, Stuart J AU - Mills SJ FAU - Weier, Matt L AU - Weier ML LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Spectrochim Acta A Mol Biomol Spectrosc JT - Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy JID - 9602533 RN - 0 (Anions) RN - 0 (Hydroxides) RN - 0 (Minerals) RN - 0 (Phosphates) RN - 0 (peisleyite) RN - 059QF0KO0R (Water) SB - IM MH - Anions/chemistry MH - Australia MH - Hydroxides/*chemistry MH - Microscopy, Electron, Scanning MH - Minerals/*chemistry MH - Phosphates/*chemistry MH - Spectrophotometry, Infrared MH - Spectrum Analysis, Raman MH - Vibration MH - Water MH - X-Ray Diffraction EDAT- 2004/11/24 09:00 MHDA- 2005/05/19 09:00 CRDT- 2004/11/24 09:00 PHST- 2004/03/22 00:00 [received] PHST- 2004/04/02 00:00 [accepted] PHST- 2004/11/24 09:00 [pubmed] PHST- 2005/05/19 09:00 [medline] PHST- 2004/11/24 09:00 [entrez] AID - S1386142504001660 [pii] AID - 10.1016/j.saa.2004.04.008 [doi] PST - ppublish SO - Spectrochim Acta A Mol Biomol Spectrosc. 2005 Jan 1;61(1-2):177-84. doi: 10.1016/j.saa.2004.04.008.