| Crystal Structure | trigonal, space group R3c |
| Cell Parameters | a = b = 12.532Ä, c = 12.717Ä, Z = 6 |
| Melting Point | 1095 +/-5°C |
| Transition Temperature | 925 +/-5°C |
| Optical Homogeneity | Dn ≈10-6/cm |
| Hardness | 4.5 Mohs |
| Density | 3.85 g/cm3 |
| Absorption Coefficient | < 0.1%/cm (at 1064 nm) |
| Hygroscopic Susceptibility | low |
| Resistivity | > 1011 ohm-cm |
| Relative Dielectric Constant |
eT11/e0: 6.7, eT33/e0: 8.1 Tan d, < 0.001 |
| Thermal Expansion Coefficients(in the range of 25°C- 900°C) |
a, 4 x 10-6/K c, 36 x 10-6/K |
| Thermal Conductivity |
^c, 1.2 W/m/K; ||c, 1.6 W/m/K |
BBO crystal physical properties
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