beryllium fluoride

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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.

Quantity Value Units Method Reference Comment
Δfgas-796.01kJ/molReviewChase, 1998Data last reviewed in June, 1970
Quantity Value Units Method Reference Comment
gas,1 bar227.56J/mol*KReviewChase, 1998Data last reviewed in June, 1970

Gas 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) 2000. to 6000.
A 61.51108
B 0.469968
C -0.094569
D 0.006520
E -3.228179
F -822.7292
G 289.9374
H -796.0060
ReferenceChase, 1998
Comment Data last reviewed in June, 1970

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

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
222.8923.TE,ME,GSGreenbaum, Foster, et al., 1963Based on data from 823. to 1223. K.; AC
196.6911.N/ANovoselova, Semenenko, et al., 1958Based on data from 821. to 1002. K.; AC
209.6911.N/ASense and Stone, 1958Based on data from 802. to 1021. K.; AC
212.9856.GSSense, Snyder, et al., 1954Based on data from 745. to 968. K.; AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
1145.6 to 1372.6.141997577.291-211.665Cantor, 1965Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
236.4 ± 2.9750.TEBlauer, Greenbaum, et al., 1965Based on data from 713. to 795. K.; AC
231.8 ± 1.7755.MSBlauer, Greenbaum, et al., 1965AC

Reaction 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.

Data compiled by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Fluorine anion + BeF2 = (Fluorine anion • BeF2)

By formula: F- + BeF2 = (F- • BeF2)

Quantity Value Units Method Reference Comment
Δr407. ± 9.6kJ/molTDEqNikitin, Sorokin, et al., 1980gas phase; Fluoride Affinity: 19.9±1.7 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention

AlF4- + BeF2 = (AlF4- • BeF2)

By formula: AlF4- + BeF2 = (AlF4- • BeF2)

Quantity Value Units Method Reference Comment
Δr182. ± 10.kJ/molTDAsNikitin, Sorokin, et al., 1980gas phase; value altered from reference due to conversion from electron convention to ion convention

Be2F5- + BeF2 = (Be2F5- • BeF2)

By formula: Be2F5- + BeF2 = (Be2F5- • BeF2)

Quantity Value Units Method Reference Comment
Δr175. ± 10.kJ/molN/ANikitin, Sorokin, et al., 1980gas phase; value altered from reference due to conversion from electron convention to ion convention

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]

Nikitin, Sorokin, et al., 1980
Nikitin, M.I.; Sorokin, I.D.; Skokan, E.V.; Sidorov, L.N., Negative Ions in the Saturated Vapors of the Potassium Fluoride - Hafnium Tetrafluoride and Potassium Fluoride - Beryllium Difluoride Systems, Russ. J. Phys. Chem., 1980, 54, page]. [all data]


Notes

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