Editing Tungsten trioxide (section)

{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 440453423
| Name = Tungsten trioxide
| ImageFile = Tungsten trioxide.png
| ImageName = Sample of Tungsten(VI) Oxide
| ImageSize = 270 px
| ImageFile1 = Kristallstruktur Wolfram(VI)-oxid.png
| IUPACName = Tungsten trioxide
| OtherNames = Tungstic anhydride<br />Tungsten(VI) oxide<br />Tungstic oxide
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 1314-35-8
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 940E10M08M
| RTECS = YO7760000
| PubChem = 14811
| InChI = 1S/3O.W
| SMILES = O=[W](=O)=O
}}
|Section2={{Chembox Properties
| Formula = WO<sub>3</sub>
| MolarMass = 231.84 g/mol
| Appearance = Canary yellow powder
| Density = 7.16 g/cm<sup>3</sup>
| Solubility = insoluble
| SolubleOther = slightly soluble in [[hydrofluoric acid|HF]]
| MeltingPtC = 1473
| BoilingPtC = 1700
| BoilingPt_notes = approximation
| MagSus = −15.8·10<sup>−6</sup> cm<sup>3</sup>/mol
}}
|Section3={{Chembox Structure
| Coordination = Octahedral (W<sup>VI</sup>)<br />Trigonal planar (O<sup>2– </sup>)
| CrystalStruct = [[Monoclinic]], [[Pearson symbol|mP32]]
| SpaceGroup = P12<sub>1</sub>/n1, No. 14
}}
|Section7={{Chembox Hazards
| ExternalSDS = [http://avogadro.chem.iastate.edu/MSDS/WO3.htm External MSDS]
| HPhrases = 
| PPhrases = 
| GHS_ref  = 
| MainHazards = Irritant
| NFPA-H = 
| NFPA-F = 
| NFPA-R = 
| NFPA-S = 
| FlashPt = Non-flammable
}}
|Section8={{Chembox Related
| OtherAnions = [[Tungsten trisulfide]]
| OtherCations = [[Chromium trioxide]]<br />[[Molybdenum trioxide]]
| OtherFunction = [[Tungsten(III) oxide]]<br />[[Tungsten(IV) oxide]]
| OtherFunction_label = [[tungsten]] [[oxide]]s
| OtherCompounds = 
}}
}}

'''Tungsten(VI) oxide''', also known as '''tungsten trioxide''' is a chemical compound of [[oxygen]] and the transition metal [[tungsten]], with [[chemical formula|formula]] WO<sub>3</sub>.  The compound is also called '''tungstic anhydride''', reflecting its relation to [[tungstic acid]] {{chem2|H2WO4}}.  It is a light yellow crystalline solid.<ref name=chri2011/>

Tungsten(VI) oxide occurs naturally in the form of [[hydrate]]s, which include minerals: [[tungstite]] WO<sub>3</sub>·H<sub>2</sub>O, [[meymacite]] WO<sub>3</sub>·2H<sub>2</sub>O and [[hydrotungstite]] (of the same composition as meymacite, however sometimes written as H<sub>2</sub>WO<sub>4</sub>). These minerals are rare to very rare secondary tungsten minerals.