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Structure of Disodium Dimolybdate Synthesized Using Thermodynamically Stable Molybdenum (VI) Oxide Clusters as Precursors
Author(s) -
Jovanović Dragana J.,
Lj.Validžić Ivana,
Mitrić Miodrag,
Nedeljković Jovan M.
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03225.x
Subject(s) - orthorhombic crystal system , octahedron , molybdenum , tetrahedron , crystallography , crystal structure , chemistry , molybdenum oxide , oxide , inorganic chemistry , aqueous solution , organic chemistry
The structure of disodium dimolybdate (Na 2 Mo 2 O 7 ) synthesized by a low‐temperature method in the process of ultrasonic spray pyrolysis using acidified aqueous solutions of thermodynamically stable molybdenum (VI) oxide clusters as a precursor was refined down to an R ‐factor of 7%. The refinement of the diffraction data showed that Na 2 Mo 2 O 7 powder synthesized at 300°C belongs to the base‐centered orthorhombic type of structure with a space group of Cmca (no. 64). It was found that the basic units of the octahedral MoO 6 precursor complexes exist in the structure of Na 2 Mo 2 O 7 . Tetrahedral MoO 4 building units that coexist together with octahedral units in the structure of Na 2 Mo 2 O 7 are most likely developed by the termination of weak octahedral bonds and by the placement of the molybdenum atom in the center of the tetrahedra.