The selenide systems of niobium and tantalum

Journal Article · Sun Feb 28 23:00:00 EST 1982 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(82)90152-9· OSTI ID:5318863

Kikkawa, S; Shinya, K; Koizumi, M

The selenide systems of niobium and tantalum were investigated under high pressures in the composition limits of MX/sub 2/ to MX/sub 3/. Two distinct phases, NbSe/sub 2/ and NbSe/sub 3/, were obtained in the niobium system. In the tantalum system, there were three phases, TaSe/sub 2/, ''TaSe/sub 3/,'' which has been thought of as a triselenide, and stoichiometric TaSe/sub 3/. The ratio of Se/Ta in ''TaSe/sub 3/'' was 2.8. Conversions of the triselenides under high pressure to NbSe/sub 2/ or TaSe/sub 2/ were observed at the starting composition of Se/M = 2.0 and to ''TaSe/sub 3/'' at Se/Ta = 2.8.

• Research Organization: Osaka Univ., Japan
• OSTI ID: 5318863
• Journal Information: J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 41:3; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CHALCOGENIDES
CHEMICAL ANALYSIS
DATA
EXPERIMENTAL DATA
GRAPHS
HIGH PRESSURE
HIGH TEMPERATURE
INFORMATION
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
NUMERICAL DATA
PHASE STUDIES
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
SELENIDES
SELENIUM COMPOUNDS
TANTALUM COMPOUNDS
TANTALUM SELENIDES
TRANSITION ELEMENT COMPOUNDS
YIELDS