LOW-TEMPERATURE ORDERED PHASE OF CAU(PO4)(2) - SYNTHESIS AND CRYSTAL-STRUCTURE

Authors
DUSAUSOY Y GHERMANI NE PODOR R CUNEY M
Citation
Y. Dusausoy et al., LOW-TEMPERATURE ORDERED PHASE OF CAU(PO4)(2) - SYNTHESIS AND CRYSTAL-STRUCTURE, European journal of mineralogy, 8(4), 1996, pp. 667-673
Citations number
21
Categorie Soggetti
Mineralogy
Journal title
European journal of mineralogy → ACNP
ISSN journal
09351221
Volume
8
Issue
4
Year of publication
1996
Pages
667 - 673
Database
ISI
SICI code
0935-1221(1996)8:4<667:LOPOC->2.0.ZU;2-4
Abstract
The crystal structure of the new compound CaU(PO4)(2) was determined f rom X-ray single-crystal data and refined to R(F) = 0.025 and R(W)(F) = 0.023 for 993 independent observed reflections. The unit cell is ort horhombic, a = 13.926(4) Angstrom, b = 6.958(3) Angstrom and c = 6.136 (2) Angstrom, space group Pnma. The structure is Ca, U ordered and in some aspects similar to the xenotime and anhydrite structure. The coor dination polyhedra for the large metal ions are described as semi regu lar trigonododecahedra.