Reduced molybdenum-niobium oxides: II. Crystal structure of (Mo, Nb)[sub 13]O[sub 33]

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1006/jssc.1994.1054· OSTI ID:5115063

Chen, S C; Greenblatt, M ^[1]

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1. State Univ. of New Jersey, Piscataway, NJ (United States)

(Mo, Nb)[sub 13]O[sub 33] crystallizes in the triclinic system, space group P1 (No. 2). The unit cell dimensions are a = 3.8194(4) [angstrom], b = 11.2898(7) [angstrom], c = 14.9764(9) [angstrom], [alpha] = 94.039(5)[degrees], [beta] = 97.326(6)[degrees], [gamma] = 99.748(7)[degrees], V = 628.47(9) [angstrom][sup 3], and Z = 1. The structure was refined to R = 0.032, R[sub w] = 0.036, with 1460 observed reflections (I > 3[sigma](I)) and 186 variable parameters. The structure of (Mo, Nb)[sub 13]O[sub 33] is related to the crystallographic shear structure of the Nb[sub 2]O[sub 5[minus][sigma]] family and is built up from the 3 [times] 4 [times] [infinity] building blocks of the ReO[sub 3]-type MO[sub 6] octahedra (M = Mo, Nb) and strings of edge-sharing MoO[sub 4] tetrahedra running along [101]. The 3 [times] 4 ReO[sub 3]-type slabs at different heights along [101] are interconnected through corner sharing with the MoO[sub 4] tetrahedra. (Mo, Nb)[sub 13]O[sub 33] is an insulator at room temperature.

• OSTI ID: 5115063
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 108:2; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
LATTICE PARAMETERS
MILLER INDICES
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
TRICLINIC LATTICES
X-RAY DIFFRACTION