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A new modification of ReO/sub 3/-type MoO/sub 3/ and the deuterated intercalation compound from which it is derived: D/sub 0. 99/MoO/sub 3/

Journal Article · · Mater. Res. Bull.; (United States)
; ;

The structures of D/sub 0.99/MoO/sub 3/ and ..beta..'-MoO/sub 3/, both closely related to the ReO/sub 3/ structure, have been determined from neutron powder diffraction data and refined using the Rietveld technique. D/sub 0.99/MoO/sub 3/ was prepared by a spillover reaction, and ..beta..'-MoO/sub 3/, a new modification of MoO/sub 3/, by heating this intercalate in oxygen at 200/sup 0/C, driving off D/sub 2/O. The D/sub 0.99/MoO/sub 3/ structure was refined as cubic (Im3-bar, a = 7.622(1)A) with deuterium statistically occupying two sites. There is evidence of ordering and reduction of the space group symmetry to at least Pm3-bar. The structure of ..beta..'-MoO/sub 3/ was refined as monoclinic (P2/sub 1//eta, a = 7.4245(1), b = 7.4783(1), c = 7.6897(1)A, ..beta.. = 90.090(2)/sup 0/). ..beta..'-MoO/sub 3/ is isostructural with the room temperature monoclinic modification of WO/sub 3/.

Research Organization:
Central Research and Development Dept., E.I. du Pont de Nemours and Co., Experimental Station, Wilmington, DE 19898
OSTI ID:
6337752
Journal Information:
Mater. Res. Bull.; (United States), Journal Name: Mater. Res. Bull.; (United States) Vol. 22:6; ISSN MRBUA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
AMBIENT TEMPERATURE
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CLATHRATES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DERIVATIZATION
DEUTERIUM
DIFFRACTION
HEATING
HIGH TEMPERATURE
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
MONOCLINIC LATTICES
NEUTRON DIFFRACTION
NUCLEI
ODD-ODD NUCLEI
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHENIUM COMPOUNDS
RHENIUM OXIDES
SCATTERING
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
SYMMETRY
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS