niobium dioxide
- Formula: NbO2
- Molecular weight: 124.9052
- IUPAC Standard InChI: InChI=1S/Nb.2O/q+4;2*-2
- IUPAC Standard InChIKey: BJDGBXPQVFSQOZ-UHFFFAOYSA-N
- CAS Registry Number: 12034-59-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Niobium(iv) oxide
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Solid Phase Heat Capacity (Shomate Equation)
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
| Temperature (K) | 298. - 1090. | 1090. - 1200. | 1200. - 2175. |
|---|---|---|---|
| A | 15.89383 | 10.16833 | 19.85000 |
| B | -2.691348 | 17.30607 | 0.000001 |
| C | 11.85832 | -8.919408 | -0.000002 |
| D | -3.935541 | 1.518880 | 6.480904×10-7 |
| E | -0.205142 | 2.136621 | -0.000001 |
| F | -195.4039 | -191.0354 | -196.3203 |
| G | 31.41898 | 21.82997 | 34.55258 |
| H | -190.0000 | -190.0000 | -190.0000 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 | Data last reviewed in December, 1973 | Data last reviewed in December, 1973 |
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References
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Notes
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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