High pressure and high temperature XAFS study of germanate: Fourfold versus sixfold coordination changes

Autor:	J. P. Itié, François Farges, J. Peryronneau, D. Andrault
Rok vydání:	1995
Předmět:	Materials science High pressure Phase (matter) Coordination number Analytical chemistry Energy dispersion Germanate Electrical and Electronic Engineering Pressure dependence Condensed Matter Physics Storage ring Electronic Optical and Magnetic Materials X-ray absorption fine structure
Zdroj:	Physica B: Condensed Matter. :327-329
ISSN:	0921-4526
DOI:	10.1016/0921-4526(94)00689-s
Popis:	The Ge coordination changes in oxides have been investigated by XAFS at high pressure and high temperature using the energy dispersive configuration of the DCI storage ring of LURE (Orsay, France). Two different experimental set-up were used to investigate both tetrahedra-to-octahedra (high pressure and temperature) and octahedra-to-tetrahedra (high temperature) changes. The network compression and dilatation are found to be precursor of phase transformations occuring under these extreme conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7f47a3cfd3f9ea48f73376c4acc838e https://doi.org/10.1016/0921-4526(94)00689-s Zobrazit plný text záznamu Full Text from ScienceDirect