Class

non-silicate mineral

Compound type

sulfide

Comments

Uniaxial positive for wavelengths red to blue-green, and negative outside

Composition comments

common impurity: Zn

Chemical bonds

	Bond	Number
	$\geq Cd-S \leq$	4

Oxides comments

77.81% Cd, 22.19% S

Strunz

Class

sulfides - sufosalts (02)

Division

metal sulfides, M:S = 1:1 (and similar) (02.C)

Family

With Zn, Fe, Cu, Ag, Au, etc. (02.CB)

Code

02.CB.45

Dana

Major class

sulfides (II)

Class

sulfides - including selenides and tellurides (02)

Type

where Am Bn Xp, with m:p=1:1 (02.08)

Group

Wurtzite group (Hexagonal: P63mc) (02.08.07)

Code

02.08.07.02

Phase type

crystalline

Crystal system

hexagonal

Crystal class

dihexagonal-pyramidal

Crystal class symbol

6mm (C6v)

Crystal spacegroup

P6(3)mc

Texture

polycrystalline

Molar mass

144.48 $g/mol$

Density

4.8 - 4.9 (4.824 calc.) $g/cm^3$

Refringence type

uniaxial

Refringence sign

positive or negative

Birefringence

0.0230

Refraction index $n_{\alpha}$

2.506

Refraction index $n_{\beta}$

2.529

Color

honey yellow, citron yellow, orange yellow, brick red

Diaphaneity

translucent to opaque

Luster

adamantine