Tellurite (mineral)

Tellurite

General
Category| Oxide minerals
Formula
(repeating unit)| TeO2
Strunz classification| 4.DE.20
Crystal system| Orthorhombic
Crystal class| Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space group| Pbca
Unit cell| a = 5.6 Å, b = 12.03 Å
c = 5.46 Å; Z = 8
Identification
Color| Yellow to white
Crystal habit| Flattened prismatic to acicular crystals, radiating groups; powdery, massive
Cleavage| Perfect on {010}
Tenacity| Flexible
Mohs scale hardness| 2
|re|er}}| Sub-adamantine
Diaphaneity| Transparent to opaque
Specific gravity| 5.88 - 5.92
Optical properties| Biaxial (-)
Refractive index| nα = 2.000 nβ = 2.180 nγ = 2.350
Birefringence| δ = 0.350
Solubility| Slight in water
References| [1][2][3]

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.[2][3]

It was first described in 1842 because of an occurrence in Faţa Băii, Zlatna, Alba County, Romania.[3]

## References

1. ↑ Tellurite in the Handbook of Mineralogy
2. ↑ 2.0 2.1 Tellurite data on Webmineral
3. ↑ 3.0 3.1 3.2 Tellurite on Mindat.org
4. ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Tellurite (mineral). Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Tellurite_(mineral)&oldid=2522369"