Perlin et al. (1993)
The solid and dashed lines correspond to the Λ1 (or T1) and Λ2 (or T2) irreps, respectively.
Davydov et al. (1998)
| Remarks | Referens | ||
| Density | 3.255 g cm-3 3.23 g cm-3 |
X-ray |
Slack (1973) Goldberg (2001) |
| Surface microhardness on basal plane (0001) |
800 kg mm-2 | 300 K, using Knoop's pyramid test | Nikolaev et al. (1998) see also Drory et al. (1996) |
| C11 | 410 ± 10 GPa | McNeil (1993) see also Wright (1997) |
| C12 | 149 ± 10 GPa | |
| C13 | 99 ± 4 GPa | |
| C33 | 389 ± 10 GPa | |
| C44 | 125 ± 5 GPa |
| Wurtzite AlN. Bulk modulus (compressibility-1) | For T = 300 K |
| Bs = [ C33(C11 + C11) - 2(C13)2] x [C11+ C12-4C13+ 2C33 ]-1 | Bs = 210 GPa |
| Young modulus, Y0 | 308 GPa | Gerlich et al. (1986) |
Poisson ratio, σ0 along the different crystallographic directions |
||
| {0001}, c-plane | 0.287 | Thokala & Chaudhuri (1995) |
| {1120}, r-plane (l = <0001>, m = <1100>) | 0 | |
| {1120}, r-plane (l = <1100>, m = <0001>) | 0.216 | |
The sound velocities and related elastic module (experimental data) |
||
| The velocity of the longitudinal waves, vl | 10,127 m s-1 | Gerlich et al. (1986) |
| The velocity of the shear waves, vs | 6,333 m s-1 | |
| The longitudinal elastic modulus, CL | 334 GPa | |
| The shear elastic modulus, Cs | 131 GPa |
| Wave propagation direction | Wave character | Expression for wave speed | Wave speed (in units of 105 cm/s) |
| [100] | VL (longitudinal) | (C11/ρ )1/2 | 11.27 |
| VT (transverse, polarization along [001]) | (C44/ρ )1/2 | 6.22 | |
| VT (transverse, polarization along [010]) | ((C11-C12)/2ρ )1/2 | 6.36 | |
| [001] | VL (longitudinal) | (C33/ρ )1/2 | 10.97 |
| VT(transverse ) | (C44/ρ )1/2 | 6.22 |
| phonon wavenumbers: | Remarks | Referens | |
| νTO(E1) | 895(2) cm-1 |
RT. Raman scattering | Sanjurjo et al. (1983) |
| νLO(E1) | 671.6(8) cm-1 | ||
| νTO(A1) | 888(2) cm-1 | ||
| νLO(A1) | 659.3(6) cm-1 | ||
| ν(E2) | 303 cm-1 | Raman scattering, tentative assignment | Carlone, et al. (1984) |
| ν(E2) | 426 cm-1 | ||
| νTO(A1) | 514 cm-1 | ||
| νTO(E1) | 614 cm-1 | ||
| νLO(A1) | 663 cm-1 | ||
| νLO(E1) | 821 cm-1 | ||
| νLO(E1) | 821 cm-1 | ||
| nTO (E1) | 657-673 cm-1 | Collins et al. (1967); Collins et al. (1967); MacMillan et al. (1993); Perlin et al. (1993); Meng (1994) |
|
| nTO (A1) | 607-614 cm-1 or 659-667 cm-1 |
||
| nLO (E1) | 895-924 cm-1 | ||
| nLO (A1) | 888-910 cm-1 | ||
| n(1) (E2) | 241-252 cm-1 | ||
| n(2) (E2) | 655-660 cm-1 |
|
AlN, Wurtzite. Pressure dependences of the phonon frequencies.
Perlin et al. (1993) |
|
AlN. Calculated phonon dispersion curves and phonon DOS function for
bulk AlN. The solid and dashed lines correspond to the Λ1 (or T1) and Λ2 (or T2) irreps, respectively. Davydov et al. (1998) |
|
|