Some substitutional chemistry in known ternary and quaternary chalcogenides. [Ta/sub 2/Ni/sub 3/S/sub 8/, Ta/sub 2/Pt/sub 3/Se/sub 8/, and Co/sub 2/Nb/sub 4/PdSe/sub 12/]
New ternary and quaternary transition-metal chalcogenides have resulted from substitutional chemistry of known phases. Ta/sub 2/Ni/sub 3/S/sub 8/ and Ta/sub 2/Pt/sub 3/Se/sub 8/ have been synthesized and characterized by single-crystal X-ray techniques. These compounds adopt the Nb/sub 2/Pd/sub 3/Se/sub 8/ structural type. Hence in Ta/sub 2/Ni/sub 3/S/sub 8/ Ni occupies both square-planar and square-pyramidal sites as similarly does Pt in Ta/sub 2/Pt/sub 3/Se/sub 8/. The electrical conductivity of Ta/sub 2/Ni/sub 3/S/sub 8/ establishes its semiconducting behavior. Ta has been substituted for Nb in the Nb/sub 2/Pd/sub 0.71/Se/sub 5/ type to yield Ta/sub 2/Pd/sub 0.89/S/sub 5/ which has been characterized by single crystal X-ray techniques. The square-planar Pd sites in the van der Waals' gap of this layer structure are 78.6(4)% occupied. This compound shows metallic behavior. The compound Co/sub 2/Nb/sub 4/PdSe/sub 12/ has been synthesized and characterized by single-crystal X-ray techniques. It is of the Co/sub 2/Ta/sub 4/PdSe/sub 12/ structural type and thus contains Nb in both trigonal prismatic and octahedral sites.
- Research Organization:
- Northwestern Univ., Evanston, IL
- OSTI ID:
- 7203653
- Journal Information:
- J. Solid State Chem.; (United States), Vol. 64:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COBALT COMPLEXES
CRYSTAL STRUCTURE
CRYSTALLIZATION
NICKEL SULFIDES
NIOBIUM COMPLEXES
PALLADIUM COMPOUNDS
PLATINUM COMPOUNDS
SELENIDES
TANTALUM COMPLEXES
BOND ANGLE
BOND LENGTHS
EXPERIMENTAL DATA
LATTICE PARAMETERS
LOW TEMPERATURE
SPACE GROUPS
STOICHIOMETRY
X-RAY DIFFRACTION
CHALCOGENIDES
COHERENT SCATTERING
COMPLEXES
DATA
DIFFRACTION
DIMENSIONS
INFORMATION
LENGTH
NICKEL COMPOUNDS
NUMERICAL DATA
PHASE TRANSFORMATIONS
SCATTERING
SELENIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties