Structures in the oxygen-deficient fluorite-related R{sub n}O{sub 2n-2} homologous series: Pr{sub 12}O{sub 22}

Journal Article · Wed Feb 14 23:00:00 EST 1996 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1996.0081· OSTI ID:263728

Zhang, J; Eyring, L ^[1]; Von Dreele, R B ^[2]

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1. Arizona State Univ., Tempe, AZ (United States)
2. Los Alamos National Laboratory, NM (United States)

The crystal structure of Pr{sub 12}O{sub 22} was determined utilizing Rietveld analysis of powder neutron diffraction data (P2{sub 1}/c, {alpha} = 6.6850(2) {Angstrom},b = 11.6004(4) {Angstrom}, c = 12.8271(4) {Angstrom}, {Beta} = 99.974(1){degrees}, V = 979.67(8) {Angstrom}{sup 3}; total variables 130, R{sub p} = 3.25%, wR{sub p} = 5.02%). This structure is different from the models previously proposed, and the basic structural element is the isolated oxygen vacancy, as observed in another more-oxidized member of the R{sub n}O{sub 2n-2} series, Tb{sub 11}O{sub 20}.

• OSTI ID: 263728
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 122; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
NEUTRON DIFFRACTION
PRASEODYMIUM OXIDES
STOICHIOMETRY
VACANCIES