publication . Other literature type . Article . 1994

Pressure induced coordination change of Ti in silicate glass: a XANES study

Friedrich Seifert; Eleonora Paris; Donald B. Dingwell; Claudia Romano; Annibale Mottana;
Open Access
  • Published: 01 Dec 1994
  • Publisher: Springer Science and Business Media LLC
  • Country: Germany
The effect of pressure on titanium coordination in glasses, with composition K2TiSi4O11, quenched isobarically from liquids equilibrated at high pressure (5, 10, 15, 20, 25, 30 kbar respectively) and T=1600° C has been investigated by X-ray absorption spectroscopy (XAS). The XANES spectra collected at the Ti K-edge clearly show a variation with pressure that is related to changes in the geometrical environment around the Ti atoms. By comparison with spectra of standard materials, the XANES spectra of the glasses suggest a relatively low average coordination number (near 5) in samples quenched at low pressure and a higher coordination number (near 6) in samples q...
free text keywords: Mineralogie, Petrologie und Geochemie, General Materials Science, Geochemistry and Petrology, ddc:550, Absorption spectroscopy, Titanium, chemistry.chemical_element, chemistry, Coordination number, Bar (unit), XANES, Quenching, Analytical chemistry, X-ray absorption spectroscopy, Spectral line, Mineralogy
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