beryllium fluoride

• Formula: BeF₂
• Molecular weight: 47.008988
• CAS Registry Number: 7787-49-7
• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
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Gas 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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Phase change 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.

Data compiled as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Enthalpy of sublimation

References

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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]

Greenbaum, Foster, et al., 1963
Greenbaum, Michael A.; Foster, James N.; Arin, M. Louis; Farber, Milton, THE THERMODYNAMIC AND PHYSICAL PROPERTIES OF BERYLLIUM COMPOUNDS. I. ENTHALPY AND ENTROPY OF VAPORIZATION OF BERYLLIUM FLUORIDE ^1,2, J. Phys. Chem., 1963, 67, 1, 36-40, https://doi.org/10.1021/j100795a009 . [all data]

Novoselova, Semenenko, et al., 1958
Novoselova, A.V.; Semenenko, K.N.; Turova, O.Ya., Vestn. Mosk. Univ., Ser. Mat., Mekh., Astron., Fiz., Khim., 1958, 13, 139. [all data]

Sense and Stone, 1958
Sense, Karl A.; Stone, Richard W., Vapor Pressures and Molecular Composition of Vapors of the Sodium Fluoride-Beryllium Fluoride System, J. Phys. Chem., 1958, 62, 4, 453-457, https://doi.org/10.1021/j150562a020 . [all data]

Sense, Snyder, et al., 1954
Sense, K.A.; Snyder, M.J.; Clegg, J.W., The Vapor Pressure of Beryllium Fluoride, J. Phys. Chem., 1954, 58, 3, 223-224, https://doi.org/10.1021/j150513a008 . [all data]

Cantor, 1965
Cantor, S., Vapor Pressures of BeF₂ and NiF₂, J. Chem. Eng. Data, 1965, 10, 3, 237-238, https://doi.org/10.1021/je60026a008 . [all data]

Blauer, Greenbaum, et al., 1965
Blauer, Jay A.; Greenbaum, Michael A.; Farber, Milton, The Thermodynamic and Physical Properties of Beryllium Compounds. VII. Enthalpy and Entropy of Sublimation of Beryllium Fluoride, J. Phys. Chem., 1965, 69, 3, 1069-1070, https://doi.org/10.1021/j100887a508 . [all data]

Notes

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• Symbols used in this document:
  

  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔsubH	Enthalpy of sublimation
  ΔvapH	Enthalpy of vaporization

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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