Crystal dimensions,
Length
Diameter

mm

100
25

Lattice:

Rhombic

Unit cell parameters 25

Å

a = 4.77

b = 10.28

c = 6.00

Refraction indexes

Ng = 1.670

Nm = 1.651

Np = 1.635

Density

g/cm³

3.217

Mohs hardness

7

Axial characteristics

Biaxial

Melting point

^oC

1895

Density of energy

J/cm²

2

Absorption cross section

cm²

1.88 ´ 10¹⁸

Thermal expansion coefficient

9.5 ´ 10^-6

Thermal conductivity

W/cm^oK

0.08 (300^oK)