Tellurite (mineral) explained

Tellurite
Category:Oxide minerals
Formula:TeO2
Imasymbol:Tlr[1]
Strunz:4.DE.20
System:Orthorhombic
Class:Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Symmetry:Pbca
Unit Cell:a = 5.6 Å, b = 12.03 Å
c = 5.46 Å; Z = 8
Color:Yellow to white
Habit:Flattened prismatic to acicular crystals, radiating groups; powdery, massive
Cleavage:Perfect on
Tenacity:Flexible
Mohs:2
Luster:Sub-adamantine
Diaphaneity:Transparent to opaque
Gravity:5.88 - 5.92
Opticalprop:Biaxial (-)
Refractive:nα = 2.000 nβ = 2.180 nγ = 2.350
Birefringence:δ = 0.350
Solubility:Slight in water
References:[2] [3] [4]

Tellurite is a rare oxide mineral composed of tellurium dioxide (TeO2).

It occurs as prismatic to acicular transparent yellow to white orthorhombic crystals. It occurs in the oxidation zone of mineral deposits in association with native tellurium, emmonsite and other tellurium minerals. Its name comes from Tellus, which is the Latin name for the planet Earth.[3] [4]

It was first described in 1842 because of an occurrence in Faţa Băii, Zlatna, Alba County, Romania.[4]

Notes and References

  1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3. 291–320. 10.1180/mgm.2021.43. 2021MinM...85..291W. 235729616. free.
  2. http://rruff.info/doclib/hom/tellurite.pdf Tellurite in the Handbook of Mineralogy
  3. http://webmineral.com/data/Tellurite.shtml Tellurite data on Webmineral
  4. http://www.mindat.org/min-3905.html Tellurite on Mindat.org