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lead difluoride

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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
Deltafgas-435.14kJ/molReviewChase, 1998Data last reviewed in December, 1973
Quantity Value Units Method Reference Comment
gas,1 bar292.66J/mol*KReviewChase, 1998Data last reviewed in December, 1973

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) 1500. - 6000.
A 57.28482
B 0.779768
C -0.210946
D 0.017981
E -0.595576
F -454.2443
G 358.4098
H -435.1360
ReferenceChase, 1998
Comment Data last reviewed in December, 1973

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
Deltafliquid-660.32kJ/molReviewChase, 1998Data last reviewed in December, 1973
Quantity Value Units Method Reference Comment
liquid,1 bar130.94J/mol*KReviewChase, 1998Data last reviewed in December, 1973
Quantity Value Units Method Reference Comment
Deltafsolid-676.97kJ/molReviewChase, 1998«alpha» phase; Data last reviewed in December, 1973

Liquid 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) 1103. - 1500.
A 109.2020
B 0.000000
C 0.000000
D 0.000000
E 0.000000
F -704.7195
G 237.2466
H -660.3189
ReferenceChase, 1998
Comment Data last reviewed in December, 1973

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. - 1000.298. - 583.583. - 716.716. - 1103.
A 71.72213-186.8250-97093.20-23622.80
B 8.0097251389.320307430.048553.10
C 24.22733-2745.560-367090.0-37178.10
D -7.9820261961.480157028.010096.20
E -0.3363543.4674113945.8102246.330
F -700.0669-650.027030185.7010852.70
G 194.3857-401.7080-173636.0-31980.70
H -676.9712-675.9900-675.9900-675.9900
ReferenceChase, 1998Chase, 1998Chase, 1998Chase, 1998
Comment «alpha» phase; Data last reviewed in December, 1973 «beta» phase; Data last reviewed in December, 1973 «beta» phase; Data last reviewed in December, 1973 «beta» phase; Data last reviewed in December, 1973

Gas phase ion energetics 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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

IE (eV) Method Reference Comment
11.5PENovak and Potts, 1983LBLHLM
11.6 ± 0.3EIZmbov, Hastie, et al., 1968RDSH
11.84PENovak and Potts, 1983Vertical value; LBLHLM

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
PbF+12.1 ± 0.3FEIZmbov, Hastie, et al., 1968RDSH

Vibrational and/or electronic energy levels

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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: Takehiko Shimanouchi

Symmetry:   C2nu     Symmetry Number sigma = 2


 Sym.   No   Approximate   Selected Freq.  Infrared   Raman   Comments 
 Species   type of mode   Value   Rating   Value  Phase  Value  Phase

a1 1 Sym str 531  D 531.2 solid solid
a1 2 Bend 165  D 165 solid solid
b1 3 Anti str 507  D 507.2 solid solid

Source: Shimanouchi, 1972

Notes

D6~15 cm-1 uncertainty

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, 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]

Novak and Potts, 1983
Novak, I.; Potts, A.W., The ultraviolet photoelectron spectra and electron structure of gas phase and condensed SnF2 and PbF2, J. Chem. Soc. Dalton Trans., 1983, 2211. [all data]

Zmbov, Hastie, et al., 1968
Zmbov, K.F.; Hastie, J.W.; Margrave, J.L., Mass spectrometric studies at high temperatures. Part 24. Thermodynamics of vaporization of SnF, and PbF, and the dissociation energies of SnF and PbF, J. Chem. Soc. Faraday Trans., 1968, 64, 861. [all data]

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume II, J. Phys. Chem. Ref. Data, 1972, 6, 3, 993-1102. [all data]


Notes

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