Constituent
- Name
- Cadmium-rich (1350ppm) sphalerite (Zn,Cd,Fe)S
- IMA name
- Sphalerite
- Class
- non-silicate mineral
- Compound type
- sulfide
- Relevance
- main - major
- Arrangement
- single phase
- Mass fraction
- 1.0
- Formula
- $(Zn,Fe)S$
- Chemical formula
- (Zn,Fe)S
- Elemental formula
- (Zn)0.75-1 (Fe)0-0.25 S
- Isotope mixture type
- terrestrial abundance
- Composition comments
- The variety Marmatite has a high Fe content and is opaque - Common impurities: Mn, Cd, Hg, In, Tl, Ga, Ge, Sb, Sn, Pb, Ag
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.05a
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
- Sphalerite group (Isometric: F4-3m) (02.08.02)
- Code
- 02.08.02.01
- Phase type
- crystalline
- Crystal system
- isometric (cubic)
- Crystal class
- hextetrahedral
- Crystal class symbol
- -43m (Td)
- Crystal spacegroup
- F-43m
- Polytypes
-
- Sphalerite-3R (or Sphalerite-3C)
- Sphalerite-2H
- Sphalerite-4H
- Sphalerite-6H
- Sphalerite-9R
- Sphalerite-12R
- Sphalerite-15R
- Sphalerite-21R
- Texture
- polycrystalline
- Molar mass
- 95.1 - 97.45 $g/mol$
- Density
- 3.9 - 4.2 $g/cm^3$
- Refringence type
- isotropic
- Refringence sign
- no
- Birefringence
- 0
- Refraction index $n_{\alpha}$
- 2.37 - 2.43
- Color
- brown, yellow, red, green, black
- Diaphaneity
- transparent to opaque
- Luster
- resinous