title: (NH4)2WTe2O8 at 5.09 GPa: a single-crystal study using synchrotron radiation.
abstract: The polar crystal structure of diammonium [octaoxidoditellurato(IV)]tungstate, (NH(4))(2)WTe(2)O(8), was studied at high pressures using single-crystal X-ray diffraction in a diamond-anvil cell at the HASYLAB synchrotron (DESY, Hamburg, Germany). No phase transition was observed up to 7.16 GPa. However, a full structure determination at 5.09 GPa shows that the coordination number of one of the two non-equivalent Te atoms has decreased from four to three.
authors.affiliation: Departamento Física Materia Condensada, Facultad de Ciencia y Tecnología, Universidad del País Vasco, Apartado 644, E-48080 Bilbao, Spain. raquelk@fea.unicamp.br
authors.forename: A
authors.initials: A
authors.lastname: Grzechnik
authors.forename: P S
authors.initials: PS
authors.lastname: Halasyamani
authors.forename: J H
authors.initials: JH
authors.lastname: Kim
authors.forename: K
authors.initials: K
authors.lastname: Friese