Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9757008 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2005 | 8 Pages |
Abstract
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 980Â cmâ1 assigned to the v1 symmetric stretching vibration of the HPO4 units. In contrast the symmetric stretching mode is observed at 942Â cmâ1 for struvite. The Raman spectra are characterised by multiple v3 anti-symmetric stretching bands and v2 and v4 bending modes indicating strong distortion of the HPO4 and PO4 units. Hannayite and newberyite are defined by bands at 3382 and 3350Â cmâ1 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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ray L. Frost, Matt L. Weier, Wayde N. Martens, Dermot A. Henry, Stuart J. Mills,