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Silver Fluoride

 

Crystal: AgF

Structure: NaCl

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Lattice formation energy:

-9.51 eV. (theorical, Mayer and al.) (Ref.1)
 

-9.45 eV. (experimental) (Ref.1)

Lattice parameter:

2.4675 Å (nn distance)

Density:

g/cm3

 

Stiffness constants: in 1011 dynes/cm2, at room temperature

c11:

c12:

c44:

Compressibility (in 1011 dynes/cm2):

Poisson ratio:

 

Debye temperature: K

Melting temperature: K

 

Phonon spectrum discussed by:

 

Transverse optic phonon T0 (k=0): cm-1

Longitude optic phonon L0 (k=0): cm-1

 

Gruneissen constant:

Ratio e*/e:

 

Photoelastic constants:

p11:

p12:

p44:

 

 

Band gap:

direct: eV. at K

indirect: 2.8 eV. at ° K

 

Plasmon energy: eV.

Exciton energy:

4.63 eV. (Gamma) at 4.8K. (Ref.2)

6.34 eV. (L) at 4.8K. (Ref.2)

 

Band structure discussed by:

R.C. Birtcher, W. Deutsch, J.F. Wenkelden & A.B. Kunz, Valence band structure in Silver Fluoride, J.of Phys. C5, 562 (1972)

 

Static dielectric constant:

Optic dielectric constant: 2.99

 

Electron mobility:

Hole mobility:

Polaron coupling constant: a = ( for m*=1 )

Effective mass:

conduction band:

valence band:

 

Electron affinity: ( in eV., from bottom of conduction band under vacuum)

 

Spin-orbit coupling: ( valence band)

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References:

 

1. C. Kittel, "Introduction to Solid State Physics", 2nd. Edition, New York: Wiley (1956)

 

2. A. Marchetti & G. L. Bottger, Optical absorption spectrum of AgF, Phys.Rev. B3, 2604 (1971)

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