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BaAn IV (PO 4 ) 2 (An IV = Th, Np) – A New Family of Layered Double Phosphates
Author(s) -
Wallez Gilles,
Bregiroux Damien,
Popa Karin,
Raison Philippe E.,
Apostolidis Christos,
LindqvistReis Patric,
Konings Rudy J. M.,
Popa Aurelian F.
Publication year - 2011
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000777
Subject(s) - isostructural , chemistry , raman spectroscopy , crystallography , crystal structure , xanes , rietveld refinement , inorganic chemistry , stereochemistry , spectral line , physics , optics , astronomy
BaTh(PO 4 ) 2 has been synthesized by a wet chemistry route and the new isotype BaNp(PO 4 ) 2 by solid‐state reaction. Although the former has been the subject of several studies since the early 1980s, the crystal structures of both compounds are reported here for the first time. Rietveld analysis shows Ba layers alternating with An(PO 4 ) 2 slabs along the a axis. Although those compounds are isostructural to RbEu(SO 4 ) 2 , these phosphates can be seen as modified yavapaiite derivatives with increased coordination numbers for Ba (XIV) and Th/Np (VIII). Raman and electron absorption spectra highlight the similarities and differences with chemically related compounds.