(McSkimin and Andreatch, Jr. [1972]).
| Density | 3.515 g cm-3 |
| Bulk modulus | 44.2·1011 dyn cm-2 |
| Hardness on the Mohs scale | 10 |
| Surface microhardness (using Knoop's pyramid test) | (8 ÷ 10)·103 kg mm-2 |
| Cleavage plane | {111} |
|
Ratio of modulus at temperature T to modulus at 25°C (McSkimin and Andreatch, Jr. [1972]). |
| Bulk modulus (compressibility-1) | For T = 300 K |
| Bs=(C11+2C12)/3 | Bs = 44.2·1011 dyn cm-2 |
| Shear modulus | |
| C'=(C11-C12)/2 | C' = 47.8·1011 dyn cm-2 |
| [100] Young's modulus | |
| Yo=(C11+2C12)·(C11-C12)/(C11+C12) | Yo= 105·1011 dyn cm-2 |
| [100] Poisson ratio | |
| σo=C12/(C11+C12) | σo = 0.1 |
| Wave propagation direction | Wave character | Expression for wave speed | Wave speed (in units of 105 cm/s) |
| [100] | VL | (C11/ρ )1/2 | 17.52 |
| VT | (C44/ρ )1/2 | 12.82 | |
| [110] | Vl | [(C11+Cl2+2C44)/2ρ ]1/2 | 18.32 |
| Vt|| | Vt||=VT= (C44/ρ )1/2 | 12.82 | |
| Vt⊥ | [(C11-C12)/2ρ ]1/2 | 11.66 | |
| [111] | Vl' | [(C11+2C12+4C44)/3ρ ]1/2 | 18.58 |
| Vt' | [(C11-C12+C44)/3ρ ]1/2 | 12.06 |
| vLTO(Γ25') | 39.9 | vLA (L1) | 30.2 |
| vLAO(X1) | 35.5 | vLO (L2') | 37.6 |
| vTA (X3) | 24.2 | vTO(L3') | 36.2 |
| vTO(X4) | 32.1 | vTA(L3) | 16.9 |
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