New extended clusters in ternary molybdenum oxides

Conference · Fri Mar 15 04:00:00 EST 1985 · J. Solid State Chem.; (United States)

OSTI ID:5490689

McCarley, R E; Lii, K H; Edwards, P A; Brough, L F

Three new compounds representative of different structure types in the family of ternary metal oxides with extended metal-metal bonded arrays are discussed. InMo/sub 4/O/sub 6/ (isomorphous with NaMo/sub 4/O/sub 6/) contains infinite anion chains of condensed octahedral cluster units, (Mo/sub 4/O/sub 6//sup -/) /sub infinity/, crosslinked to form channels where In/sup +/ cations reside in sites of square pyramidal coordination to oxygen. The linear array of In atoms in the channels, with d(In-In) = 2.8628(4) A, suggests some degree of In-In bonding, and these interactions may contribute to the metallic conductivity determined for this compound over the range 2-300 K. Infinite chains with Mo/sub 2/O/sub 4/ repeat units condensed as rhomboidal clusters fused on opposite edges are the outstanding structural feature of NaMo/sub 2/O/sub 4/. The compound also has a double-layer lattice MoO/sub 2/ with Na/sup +/ ions fractionally occupying octahedral coordination sites between alternate layers. The compound Ca/sub 5.45/Mo/sub 18/O/sub 32/ contains three different kinds of cluster chains with Mo/sub 1/, Mo/sub 2/, and Mo/sub 4/ repeat units. Metal cluster electron counts on the three different repeat units, estimated from Mo-O bond strength-bond distance relations, are reflected in the formula Ca/sub 5.45/(MoO/sub 3//sup 2.26-/)/sub 2/(Mo/sub 2/O/sub 3.5//sup 0.22-/)/sub 4/(Mo/sub 4/O/sub 6//sup 2.65-/)/sub 2/. 24 references, 4 figures, 3 tables.

• Research Organization: Iowa State Univ., Ames
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5490689
• Report Number(s): CONF-840415-
• Conference Information: Journal Name: J. Solid State Chem.; (United States) Journal Volume: 57:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
CRYSTALS
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
INDIUM COMPOUNDS
INFORMATION
INTERSTITIALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
MONOCRYSTALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
POWDERS
REFRACTORY METAL COMPOUNDS
SCATTERING
SODIUM COMPOUNDS
SPACE GROUPS
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
VALENCE
X-RAY DIFFRACTION