Sulfur K-edge XANES spectroscopy; chemical state and content of sulfur in silicate glasses
Sulfur K-edge XANES spectroscopy; chemical state and content of sulfur in silicate glasses (in S (super 3) ; sulfides, structures, and synchrotron light; a tribute to Michael E. Fleet, Grant S. Henderson (editor), Yuanming Pan (editor) and Robert F. Martin (editor))
The Canadian Mineralogist (October 2005) 43, Part 5: 1605-1618
The chemical state and local environment of sulphur in basaltic glasses from the eastern Galapagos rift and quenched laboratory experiments have been studied by synchrotron-radiation S K-edge XANES using an energy-selective fluorescence detector. Sulphur in melts in the system 6NaAlSiO (sub 4) -CaS-CaSO (sub 4) quenched from 1500 degrees C and various reference compounds was also investigated. The linear correlation between relative XANES area and wt% content of sulphur has been used to estimate the sulphur content in samples of lazurite (5.6-6.3 wt% by EPMA), scapolite-group minerals (0.4 wt%) and the basaltic glasses (0.04-0.15 wt%). The S K-edge spectra for glasses from the eastern Galapagos rift are dominated by S (super 2-) , but one total-electron yield spectrum shows possible thiosulphate and another, trace sulphate.