Structural trends in Bi containing pyrochlores: The structure of Bi{sub 2}Rh{sub 2}O{sub 7{minus}{delta}}

Journal Article · Thu May 01 00:00:00 EDT 1997 · Materials Research Bulletin

DOI:https://doi.org/10.1016/S0025-5408(97)00008-1· OSTI ID:509187

Kennedy, B J ^[1]

---

1. Univ. of Sydney, New South Wales (Australia). School of Chemistry

The room temperature structure of Bi{sub 2}Rh{sub 2}O{sub 7{minus}{delta}} has been refined from neutron powder diffraction data, {lambda} = 1.8857 {angstrom}, cubic Fd{bar 3}m, a = 10.2763(1) {angstrom}, V = 1085.23 {angstrom}{sup 3}, Z = 8, R{sub p} = 0.040, R{sub wp} = 0.054, R{sub exp} = 0.035 for 45 reflections. The structure is of a pyrochlore type with the oxygen position parameter of 0.3317(4) where there are both bismuth and oxygen vacancies. The anion vacancies are in the 8b O{prime} site. The structure is compared with that of a number of other Bi containing pyrochlores.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 509187
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 5 Vol. 32; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CORRELATIONS
CRYSTAL STRUCTURE
CUBIC LATTICES
LATTICE PARAMETERS
PYROCHLORE
RHODIUM OXIDES
VACANCIES