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Cesium Bromide
Crystal:
CsBrStructure: CsCl
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Lattice formation energy: |
-6.35 eV. (theory, Mayer and al.) (Ref.1) |
-6.45 eV. (experimental) (Ref.1) |
|
Lattice parameter: |
3.71 Å |
Density: |
g/cm3 |
Stiffness constants: in 1011 dynes/cm2, at room temperature
c11: 3.10 (Ref.2) or 2.00
c12: 0.84 or 0.78
c44: 0.75 or 0.76
Compressibility (in 1011 dynes/cm2): 0.627 ??
Poisson ratio:
Debye temperature: K
Melting temperature: K
Phonon spectrum discussed by:
J.F. Vetelino, Lattice dynamics, mode Gruneisen parameters & coefficient of thermal expansion of CsCl, CsBr & CsI, Phys. Rev. B2, 2167
Also: S. Rolandson & G. Raunio, Lattice dynamics of CsBr, Phys. Rev. B4, 4617 (1971)
Transverse optic phonon T0 (k=0): cm-1
Longitude optic phonon L0 (k=0): cm-1
Gruneissen constant:
Ratio e*/e: 0.78
Photoelastic constants:
p11:
p12:
p44:
Band gap:
direct: eV. at K
indirect: eV. at ° K
Plasmon energy: eV.
Exciton energy: 6.83 eV. (Ref.3)
Band structure discussed by:
L. Nosenzo & E. Reguzzoni, Analysis of the electronic structure in Cesium halides by reflectance & thermoreflectance studies, Phys. Rev. B19, 2314 (1979)
E. Boursey and J.-Y. Rongin, Absorption spectra of Cesium halides at 20K. from 12 to 20 eV., Sol. State Com. 9, 1049 (1971)
Static dielectric constant: 6.51
Optic dielectric constant: 2.78
Electron mobility:
Hole mobility:
Polaron coupling constant:
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:
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