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Stock List Crystals & Substrates

Stock List Targets

Crystal symmetry

Trigonal 32/m

Unit cell

a = 4,9896(2)Å
c = 17,0610(11) Å
Z = 6

Identification

Color

Colorless or

Crystal system

Trigonal hexagonal scalenohedral(32/m), Space Group (R3 2/c)

Lattice constant

a_rh   = 6,37Å     a` 101°.55`
a_hex = 4,99 Å
c_{hex = 17,04 Å}

Cleavage

Perfect on [1011] three directions with angle of 55` 74°
Rh. [1014] Hex

Mohs scale hardness

3

Diaphaneity

Transparent to translucent

Specific gravity

2,71

Optical properties

Uniaxial (-)

Refractive index

n_ಎ = 1.640 -1.660
n_ԑ = 1.486

Birefringence

δ = 0.154 - 0.174