Hematite (Fe2O3)
- Formula: Fe2O3
- Molecular weight: 159.688
- CAS Registry Number: 1317-60-8
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Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -825.50 | kJ/mol | Review | Chase, 1998 | hematite phase; Data last reviewed in June, 1965 |
Solid Phase Heat Capacity (Shomate Equation)
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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 950. | 950. to 1050. | 1050. to 2500. |
|---|---|---|---|
| A | 93.43834 | 150.6240 | 110.9362 |
| B | 108.3577 | 0.000000 | 32.04714 |
| C | -50.86447 | 0.000000 | -9.192333 |
| D | 25.58683 | 0.000000 | 0.901506 |
| E | -1.611330 | 0.000000 | 5.433677 |
| F | -863.2094 | -875.6066 | -843.1471 |
| G | 161.0719 | 252.8814 | 228.3548 |
| H | -825.5032 | -825.5032 | -825.5032 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | hematite phase; Data last reviewed in June, 1965 | hematite phase; Data last reviewed in June, 1965 | hematite phase; Data last reviewed in June, 1965 |
References
Go To: Top, Condensed phase thermochemistry data, 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, Condensed phase thermochemistry data, References
- Symbols used in this document:
ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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