(Boyle and Sladek [1975]).
| Bulk modulus | 8.8·1011 dyn/cm2 |
| Density | 4.138 g/cm3 |
| Hardness | 5 on the Mohs scale |
| Surface microhardness (using Knoop's pyramid test) | 850 kg/mm2 |
| Cleavage plane | { 110 } |
| Piezoelectric constant | e14= -0.1 C m-2 |
|
Temperature dependences of elastic constants. (Boyle and Sladek [1975]). |
| Bulk modulus (compressibility-1) | Bs = 8.82·1011 dyn/cm2 |
| Shear modulus | C' = 3.92·1011 dyn/cm2 |
| [100] Young's modulus | Yo= 10.3·1011 dyn/cm2 |
| [100] Poisson ratio | σo = 0.31 |
| Wave propagation Direction | Wave character | Expression for wave speed | Wave speed (in units of 105 cm/s) |
| [100] | VL | (C11/ρ)1/2 | 5.83 |
| VT | (C44/ρ)1/2 | 4.12 | |
| [100] | Vl | [(C11+Cl2+2C44)/2ρ]1/2 | 6.43 |
| Vt|| | Vt||=VT=(C44/ρ)1/2 | 4.12 | |
| Vt⊥ | [(C11-C12)/2ρ]1/2 | 3.08 | |
| [111] | Vl' | [(C11+2C12+4C44)/3ρ]1/2 | 6.63 |
| Vt' | [(C11-C12+C44)/3ρ]1/2 | 3.46 |
| νLO(X) | 11.3 |
| νTO(X) | 10.96 |
| νLA(X) | 7.65 |
| νTA(X) | 3.16 |
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