HEATS OF FORMATION OF NIOBIUM DIOXIDE, NIOBIUM SUBNITRIDE AND TANTALUM SUBNITRIDE

Journal Article · Fri Aug 01 04:00:00 EDT 1958 · Journal of the American Chemical Society (U.S.)

DOI:https://doi.org/10.1021/ja01548a018· OSTI ID:4315003

Mah, A D

The energies of combustion of niobium dioxide (NbO/sub 2/), niobium subnitride (Nb/sub 2/N) and, tentatively, tantalum subnitride (Ta/sub 2/N) were determined by bomb calorimetry. The results, in conjunction with the heats of formation of the corresponding pentoxides, lead to the following standard heats of formation at 298.15 deg K (kcal/mole): HbO/sub 2/, --190.9 /4PP 0.4; Nb/sub 2/ N, --61.1 plus or minus 1.0; and Ta/sub 2/N, --64.7 plus or minus 3.0 (tentative). (auth)

• Research Organization: Bureau of Mines, Berkeley, Calif.
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-015339
• OSTI ID: 4315003
• Journal Information: Journal of the American Chemical Society (U.S.), Journal Name: Journal of the American Chemical Society (U.S.) Vol. Vol: 80; ISSN JACSA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CALORIMETERS
CHEMISTRY
COMBUSTION
FORMATION HEAT
HEATING
MEASURED VALUES
NIOBIUM NITRIDES
NIOBIUM OXIDES
PRESSURE VESSELS
QUANTITATIVE ANALYSIS
REACTION KINETICS
TANTALUM OXIDES
THERMODYNAMICS