期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 62, 期 1-3, 页码 181-188出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2004.12.024
关键词
hannayite; newberryite; struvite; phosphate; Raman spectroscopy
类别
The phosphate minerals hannayite, newberyite and struvite have been studied by Raman spectroscopy using a thermal stage. Hannayite and newberyite are characterised by an intense band at around 980 cm(-1) assigned to the v, symmetric stretching vibration of the HPO4 units. In contrast the symmetric stretching mode is observed at 942 cm(-1) for struvite. The Raman spectra are characterised by multiple v(3) anti-symmetric stretching bands and v(2) and v(4) bending modes indicating strong distortion of the HPO4 and PO4 units. Hannayite and newberyite are defined by bands at 3382 and 3350 cm(-1) attributed to HOPO3 vibrations and hannayite and struvite by bands at 2990, 2973 and 2874 assigned to NH4+ bands. Raman spectroscopy has proven most useful for the analysis of these 'cave' minerals where complex paragenetic relationships exist between the minerals. (c) 2004 Elsevier B.V. All rights reserved.
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