Document Detail

A high-pressure single-crystal synchrotron diffraction study of NH(4)RbTe(4)O(9)·2H(2)O: stability of three different TeO(x) coordination polyhedra.
MedLine Citation:
PMID:  21979964     Owner:  NLM     Status:  In-Data-Review    
The crystal structure of ammonium rubidium nonaoxotetratellurate(IV) dihydrate has been studied as a function of pressure up to 7.40 GPa. The ambient-pressure structure is characterized by the co-existence of three different Te-O polyhedra (TeO(3), TeO(4) and TeO(5)), which are connected to form layers. NH(4)(+), H(2)O and Rb(+) are incorporated between the layers. Both the Rb1 position, which is located on a twofold axis, and the Rb2 position are partially occupied. The three different types of coordination polyhedra around Te(4+) are stable up to at least 5.05 GPa. No phase transition is observed. The fit of the unit-cell volume as a function of pressure gives a zero-pressure bulk modulus of 34 (1) GPa with a zero-pressure volume of V(0) = 2620 (4) Å(3) [B' = 1.4 (2)].
K Friese; P S Halasyamani; M Tolkiehn; A Grzechnik
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Publication Detail:
Type:  Journal Article     Date:  2011-09-02
Journal Detail:
Title:  Acta crystallographica. Section C, Crystal structure communications     Volume:  67     ISSN:  1600-5759     ISO Abbreviation:  Acta Crystallogr C     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-10-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8305826     Medline TA:  Acta Crystallogr C     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  i45-i49     Citation Subset:  IM    
Departamento Física Materia Condensada, Facultad de Ciencia y Tecnología, Universidad del País Vasco, Apartado 644, E-48080 Bilbao, Spain.
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