cadmoindite
Sign in to saveAlso known as IMA2003-042
Cadmoindite (CdIn2S4) is a rare cadmium indium sulfide mineral discovered in Siberia around the vent of a high-temperature (450–600 °C) fumarole at the Kudriavy volcano, Iturup Island in the Kuril Islands. It has also been reported from the Kateřina Coal Mine in Bohemia, Czech Republic.
Key facts
- Mineral.name
- Cadmoindite
- Mineral.category
- Sulfide mineral Thiospinel group Spinel structural group
- Mineral.image
- Cadmoindite.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Cadmoindite, from Kudriavy Volcano, Far Eastern Region, Russian Federation
- Mineral.formula
- CdIn2S4
- Mineral.IMAsymbol
- Cad
- Mineral.molweight
- 470.32 g/mol
- Mineral.strunz
- 2.DA.05
- Mineral.system
- Cubic
- Mineral.class
- Hexoctahedral (mm) H-M symbol (4/m 2/m)
- Mineral.symmetry
- Fdm
- Mineral.unit cell
- a = 10.81 Å; Z = 8
- Mineral.color
- Black to dark brown
- Mineral.habit
- Microscopic octahedral crystals
- Mineral.fracture
- Conchoidal
- Mineral.luster
- Adamantine
- Mineral.opticalprop
- Isotropic
via Wikipedia infobox
~1 min read
Encyclopedic overview
2 sectionsContents
- Crystal structure
- References
Cadmoindite (CdIn2S4) is a rare cadmium indium sulfide mineral discovered in Siberia around the vent of a high-temperature (450–600 °C) fumarole at the Kudriavy volcano, Iturup Island in the Kuril Islands. It has also been reported from the Kateřina Coal Mine in Bohemia, Czech Republic.
==Crystal structure== CdIn2S4 exhibits the spinel structure, which can be described by a cubic unit cell with 8 tetrahedrally coordinated and 16 tetrahedrally coordinated cation sites. The distribution of Cd(II) and In(III) over the cation sites is difficult to elucidate from standard X-ray diffraction techniques because the two species are isoelectronic, but both Raman spectroscopy measurements on synthetic samples and density functional theory simulations indicate that about 20% of the tetrahedral sites are occupied by In(III) cations.
Excerpted from Wikipedia’s “cadmoindite” article, available under the CC BY-SA 4.0 licence.