Tellurium dioxide

Tellurium dioxide
	; α-TeO2, paratellurite
Names
	Other names Tellurium(IV) oxide
Identifiers
CAS Number	7446-07-3 ;
3D model (JSmol)	Interactive image;
ChemSpider	56390 ;
ECHA InfoCard	100.028.357
PubChem CID	62638;
UNII	397E9RKE83 ;
CompTox Dashboard (EPA)	DTXSID8052487 ;
	InChI InChI=1S/O2Te/c1-3-2 Key: LAJZODKXOMJMPK-UHFFFAOYSA-N ; InChI=1/O2Te/c1-3-2 Key: LAJZODKXOMJMPK-UHFFFAOYAO;
	SMILES O=[Te]=O;
Properties
Chemical formula	TeO2
Molar mass	159.60 g/mol
Appearance	white solid
Density	5.670 g/cm3(orthorhombic) ; 6.04 g/cm3 (tetragonal)
Melting point	732 °C (1,350 °F; 1,005 K)
Boiling point	1,245 °C (2,273 °F; 1,518 K)
Solubility in water	negligible
Solubility	soluble in acid and alkali
Refractive index (nD)	2.24
Hazards
Flash point	Non-flammable
Related compounds
Other cations	Sulfur dioxide; Selenium dioxide
Related tellurium oxides	Tellurium trioxide; Tellurium monoxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Tellurium dioxide (TeO₂) is a solid oxide of tellurium. It is encountered in two different forms, the yellow orthorhombic mineral tellurite, β-TeO₂, and the synthetic, colourless tetragonal (paratellurite), α-TeO₂. Most of the information regarding reaction chemistry has been obtained in studies involving paratellurite, α-TeO₂.

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