Raman spectroscopy of the sampleite group of minerals

Abstract

Raman and infrared spectroscopy enabled insights into the molecular structure of the sampleite group of minerals. These minerals are based upon the incorporation of either phosphate or arsenate with chloride anion into the structure, and as a consequence the spectra reflect the bands attributable to these anions, namely, phosphate or arsenate with chloride. The sampleite vibrational spectrum reflects the spectrum of the phosphate anion and consists of n 1 at 964 cm −1 , n 2 at 451 cm −1 , n 3 at 1016 and 1088 cm −1 and n 4 at 643, 604, 591 and 557 cm −1 . The lavendulan spectrum consists of n 1 at 854 cm −1 , n 2 at 345 cm −1 , n 3 at 878 cm −1 and n 4 at 545 cm −1 . The Raman spectrum of lemanskiite is different from that of lavendulan consistent with a different structure. Low wavenumber bands at 227 and 210 cm −1 may be assigned to CuCl transverse/longitudinal (TO/LO) optic vibrations. Raman spectroscopy identified the substitution of arsenate by phosphate in zdenekite and lavendulan.

Thermal analysis of smithsonite and hydrozincite

“…In order to ensure that the correct spectra are obtained, the incident excitation radiation was scrambled. Previous studies by the authors provide more details of the experimental technique [11,12,15,17,[41][42][43][44][45][46][47].…”

Raman spectroscopic study of the uranyl carbonate mineral voglite

“…[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] Raman spectroscopy has proven most useful for the study of diagentically related minerals as often occurs with carbonate minerals. [30][31][32][34][35][36][37] No detailed Raman spectroscopic studies of the uranyl mineral voglite has been forth coming.…”

Raman spectroscopic study of the tellurite minerals: Carlfriesite and spiroffite

“…• Author to whom correspondence should be addressed (r.frost@qut.edu.au) 2 A 2 (XO 3 ) 3 .xH 2 Raman spectroscopy has proven very useful for the study of minerals [25][26][27][28][29][30][31][32][33][34][35].…”