Alexandrite - ALLEXITE (710 nm - 800 nm)

alexandrite

Ordering Options & Specifications

alexandrite absorption graph
alexandrite data sheet
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%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

More Information

Rod Lengths: 3 mm -152.4 mm
Rod Diameters
: 2 mm - 12.7 mm