Concentration dependences of the unit-cell parameters of nonstoichiometricfluorite-type Na0.5-xR0.5+xF2+2x phases (R = rare-earth elements)

Authors
Fedorov, PP Aleksandrov, VB Bondareva, OS Buchinskaya, II Val'kovskii, MD Sobolev, BP
Citation
Pp. Fedorov et al., Concentration dependences of the unit-cell parameters of nonstoichiometricfluorite-type Na0.5-xR0.5+xF2+2x phases (R = rare-earth elements), CRYSTALLO R, 46(2), 2001, pp. 239-245
Citations number
29
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CRYSTALLOGRAPHY REPORTS
ISSN journal
10637745 → ACNP
Volume
46
Issue
2
Year of publication
2001
Pages
239 - 245
Database
ISI
SICI code
1063-7745(200103/04)46:2<239:CDOTUP>2.0.ZU;2-1
Abstract
Unit-cell parameter a of the cubic phases with a varying composition Na0.5- xR0.5+xF2+2x (R = Gd-Lu and Y) and with a fluorite-type structure, is descr ibed within an accuracy of +/-0.003 Angstrom, by the formula a = 4.454 + 0. 874r(3) + x(6.7238r(3) - 7.259) where r(3) is the Shannon "crystal ionic ra dius" R3+ at c.n. = 8. (C) 2001 MAIK "Nauka/Interperiodica".