Sphalerite facts for kids

Kids Encyclopedia Facts
Sphalerite
Fluorite-Galena-Chalcopyrite-172352.jpg
General
Category Sulfide mineral
Formula
(repeating unit)
(Zn,Fe)S
Strunz classification 2.CB.05a
Dana classification 02.08.02.01
Crystal symmetry F43m (No. 216)
Unit cell a = 5.406 Å; Z = 4
Identification
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.
Crystal system Cubic
Twinning Simple contact twins or complex lamellar forms, twin axis [111]
Cleavage perfect
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
Specific gravity 3.9–4.2
Optical properties Isotropic
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.