Alexandrite - ALLEXITE
Alexandrite (710-800 nm)Applications
Medical, Cosmetic, Spectroscopy, Industrial Ordering Options and Specifications
| Ordering Options and Specifications | |
| %Cr Concentration | 0.13% (0.10% to 0.20% available) |
| Wavefront Distortion (per inch of rod length) | l/2 |
| End Face Parallelism | <30 arc seconds |
| Material Properties | |
| Formula | Be (Al1-xCrx)2O4 |
| Crystal Structure | Orthorhombic |
| Unit Cell Dimensions (Å) | 5.476(a) x 9.404(b) x 4.427(c) per ASTM 10-32 |
| Thermal Expansion (x 10-6 °C-1) |
5.9(a) x 6.1(b) x 6.7(c) |
| Index of Refraction (at 750 nm) |
1.7367(a) x 1.7241(b) x 1.7346(c) |
| Melting Point | 1870°C |
| Vickers Hardness | 2000 kg mm-2 |
| Density | 3.7 g/cm3 |
| Thermal Conductivity | 0.23 W cm-1 K-1 |
| Young's Modulus | 469 GPa |
| Thermal Shock Resistance | 35-74 W/cm |
| dn/dT | 8 x 10-6 K-1 |
Available Rod Lengths
3 mm - 152.4 mm
Available Rod Diameters
2 mm - 12.7 mm