Publication Type:
Journal Article
Source:
American MineralogistAmerican Mineralogist, Volume 93, Number 1, p.235-240 (2008)
ISBN:
0003-004X
Keywords:
Beam damage,
Glass properties,
Sulfur K-edge,
Sulfur oxidation state,
Sulfur speciation,
XANES),
XAS (XAFS
Abstract:
The origin of sulfite (S4+) species in silicate glasses was evaluated using {XANES} at the S K-edge. Systematic investigations show that the presence of S4+ species in silicate glasses is an analytical artifact related to changes in the sulfur species caused by irradiation with an electron beam during {EMPA} or by irradiation with an intense focused X-ray beam during synchrotron analysis. The data shown here indicate that S2− and S6+ are the only significant sulfur species occurring in silicate glasses synthesized under geologically relevant conditions.
