● Roughness: 5Å
Typical Properties
● Materials Purity: > 99.9%
● Crystal Structure: Rhombohedral space group 3M
● Lattice Constant: ( Hex ) a = 5.154 Å c = 13.783 Å
● Melting Point: 1650 oC
● Density: 7.45 g /cm3
● Curie Point: 610 oC
● Hardness: 5.5 - 6 Moh
● Thermal Expansion: a a= 16.1 x 10 -6 / k a c= 4.1 x 10 -6 / k
● Resistivity: 1015 W.m
● Dielectric Constant: es11 / e0: 39 ~43 es33 / e0: 42 ~43
et11 / e0: 51 ~54 et11 / e0: 43 ~46
● Color: colorless
● Transmission Range : 0.4~5.0 mm
● Refractive Index : ho = 2.176 he = 2.180 @ 633 nm
