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
Abstract
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...
Subjects
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
37 references, page 1 of 3

Behrens P, ABmann S, Felsche J, Vetter S, Schulz-EkloffG, Jaeger NI, Niemann W (1990) Metal-atom substitutes microporous materials - X-ray absorption spectroscopic studies. Proc VIth Inter Conf X-ray Absorption Fine structure, York

Bottinga Y (1985) On isothermal compressibility of silicate liquids at high pressure. Earth Plan Sc Lett 74:350-360

Bottinga Y, Weill D, Richet P (1982) Density calculations for silicate liquids. I. Revised method for aluminosilicate compositions. Geochim Cosmochim Acta 46:909-919 [OpenAIRE]

Brown GE jr, Calas G, Waychunas GA, Petiau J (1988) X-ray absorption spectroscopy and its applications in mineralogy and geochemistry. In: "Spectroscopic methods in mineralogy and geology" Hawthorne F, Ed., Reviews in mineralogy 18, MSA [OpenAIRE]

Calas G, Petiau J (1983) Structure of oxide glasses: spectroscopic studies of local order and crystal chemistry. Geochemical implications. Bull Mineral 106:33 35

Davoli I, Paris E (1990) Principles and recent developments in XANES spectroscopy. In "Absorption spectroscopy in mineralogy" Mottana A., & Burragato F. Eds., Elsevier, Amsterdam 206 224

Davoli I, Paris E, Stizza S, Benfatto M, Fanfoni M, Gargano A, Bianconi A, Seifert F (1992) Structure of densified vitreous silica: silicon and oxygen XANES spectra and multiple scattering calculations. Phys Chem Minerals 19:171-175 [OpenAIRE]

Dingwell DB (1992) Density of some titanium-bearing silicate liquids and the compositional dependence of the partial molar volume of TiO2. Geochim Cosmochim Acta 56:3403-3407 [OpenAIRE]

Dingwell DB, Paris E, Seifert F, Mottana A, Romano C (1994) X-ray absorption study of Ti-bearing silicate glasses. Phys Chem Minerals 21:501 509 [OpenAIRE]

Durben DJ, Wolf GH (1991) Raman spectroscopic study of the pressure-induced coordination change in GeO2 glass. Phys Rev B 43 :2355-2363 [OpenAIRE]

Fischer K (1969) Verfeinerung der Kristallstruktur von Benitoit BaTi[Si3Og]. Zeits fiir Kristalt 129:222-243

Fleet M, Herzberg CT, Henderson GS, Crozier ED, Osborne MD, Scarfe CM (1984) Coordination of Fe, Ga and Ge in high pressure glasses by M6ssbauer, Raman and X-ray absorption spectroscopy, and geological implications. Geochim Cosmochim Acta 48:1455-1466

Galoisy L, Calas G (1993) Structural environment of nickel in silicate glass/melt systems. Part 1: Spectroscopic determination of coordination states. Geochim Cosmochim Acta 57:3613-3626

Greegor RB, Lytle FW, Sandstrom DR, Wong J, Schultz P (1983) Investigation of TiO2-SiO2 glasses by X-ray absorption spectroscopy. J Non-Cryst Solids 55:27-43

Iti6 JP, Polian A, Calas G, Petiau J, Fontaine A, Tolentino H (1989) Pressure induced coordination changes in crystalline and vitreous GeOz. Phys Rev Lett 63:398 401 [OpenAIRE]

37 references, page 1 of 3
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