Optical and spectral properties
Refractive index @750 nm
1,737 (∥ a-Achse)

1,742 (∥ b-Achse)

1,735 (∥c-Achse)

dN/dT in 1/K
8·10-6
Physical properties
Density in g/cm3
3,7
Melting point in °C
1870
Crystal structure
rhombic
Thermal conductivity in W/(m · K)
23
Thermal expansion in 1/K
5,9·10-6 (∥ a-axis)

6,1·10-6(∥ b-Achse)

6,7·10-6(∥ c-axis)

Vickers hardness in kg/mm2
2000
Lattice constant in Å
a = 5,47

b= 9,39

c=4,43

Fluorescence lifetime in µs
260
Dopant concentration in at.%
0,03 ‐ 1,0