Sphalerite facts for kids
|Crystal symmetry||F43m (No. 216)|
|Unit cell||a = 5.406 Å; Z = 4|
|Color||Brown, yellow, red, green, black.|
|Crystal habit||Euhedral crystals – occurs as well-formed crystals showing good external form. Granular – generally occurs as anhedral to subhedral crystals in matrix.|
|Twinning||Simple contact twins or complex lamellar forms, twin axis |
|Fracture||Uneven to conchoidal|
|Mohs scale hardness||3.5-4|
|Luster||Adamantine, resinous, greasy|
|Streak||brownish white, pale yellow|
|Diaphaneity||Transparent to translucent, opaque when iron-rich|
|Refractive index||nα = 2.369|
|Other characteristics||non-radioactive, non-magnetic, fluorescent and triboluminescent.|
Sphalerite is a mineral. Its is a mixed zinc and iron sulfide. The chemical formula is (Zn,Fe)S. It can be brown, yellow, red, green, and black. It is normally found with galena, a lead ore. It is also known as zinc blende. It has a Mohs hardness of 3.5 to 4. It is the main ore of zinc. It has a non-metalic sheen.
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Sphalerite Facts for Kids. Kiddle Encyclopedia.