Misplaced Pages

Antimony tetroxide: Difference between revisions

Article snapshot taken from[REDACTED] with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Browse history interactively← Previous editContent deleted Content addedVisualWikitext
Revision as of 13:27, 24 April 2011 editWilliam Avery (talk | contribs)Autopatrolled, Extended confirmed users, Page movers, Pending changes reviewers, Rollbackers479,213 edits Disambiguated: polymorph → polymorphism (materials science) using Dab solver← Previous edit Latest revision as of 05:33, 17 November 2024 edit undoGraeme Bartlett (talk | contribs)Administrators250,281 edits more ids 
(30 intermediate revisions by 20 users not shown)
Line 1: Line 1:
{{chembox {{Chembox
| Verifiedfields = changed
⚫ | Name = Antimony tetroxide
| Watchedfields = changed
| ImageFile = Sb2O4 structure.jpg
| verifiedrevid = 434226759
⚫ | Name = Antimony tetroxide
| ImageFile1 = Alpha-Sb2O4-xtal-b-2x2x2-3D-bs-17.png
| ImageCaption1 = ''α''-{{chem2|Sb2O4}}
| ImageFile2 = Beta-Sb2O4-xtal-b-2x2x2-3D-bs-17.png
| ImageCaption2 = ''β''-{{chem2|Sb2O4}}<br><br>{{Color box|#bd80e3|border=darkgray}} ] {{Color box|#ee2010|border=darkgray}} ]
| IUPACName = antimony(III,V) oxide | IUPACName = antimony(III,V) oxide
| ImageName = | ImageName =
| OtherNames = | OtherNames =
| Section1 = {{Chembox Identifiers |Section1={{Chembox Identifiers
| CASNo = 12786-74-2 | CASNo = 1332-81-6
| CASNo_Ref = {{cascite|correct|CAS}}
| CASOther = 1332-81-6
| ChemSpiderID = 66628
⚫ }}
| EINECS = 215-576-0
⚫ | Section2 = {{Chembox Properties
| UNII_Ref = {{fdacite|correct|FDA}}
⚫ | Formula = SbO<sub>2</sub>; Sb<sub>2</sub>O<sub>4</sub>
| UNII = XB7RVZ5DN5
⚫ | MolarMass = 153.7588; 307.5176 g/mol
| PubChem = 74002
⚫ | Appearance = white solid
⚫ }}
⚫ | Density = 6.64 g/cm<sup>3</sup> (orthorhombic form) <ref name="Amador" />
⚫ |Section2={{Chembox Properties
⚫ | Solubility = insoluble
⚫ | Formula = SbO<sub>2</sub>; Sb<sub>2</sub>O<sub>4</sub>
⚫ | MeltingPt = dec.
⚫ | MolarMass = 153.7588; 307.5176 g/mol
| BoilingPt = dec.
⚫ | Appearance = white solid
⚫ | pKa =
⚫ | Density = 6.64 g/cm<sup>3</sup> (orthorhombic form) <ref name="Amador" />
⚫ | Solubility = insoluble
⚫ | MeltingPt = >
| MeltingPtC = 930
| MeltingPt_notes = (decomposes)
| BoilingPt_notes = decomposes
⚫ | pKa =
| RefractIndex = 2.0 | RefractIndex = 2.0
}} }}
| Section3 = {{Chembox Structure |Section3={{Chembox Structure
| Coordination = | Coordination =
| CrystalStruct = ] | CrystalStruct = ]
| Dipole = | Dipole =
}} }}
| Section7 = {{Chembox Hazards |Section7={{Chembox Hazards
| ExternalMSDS = | ExternalSDS =
⚫ | NFPA-H = 2
| EUClass =
| NFPA-R = | NFPA-F = 1
| RPhrases = | NFPA-R = 0
| REL = TWA 0.5 mg/m<sup>3</sup> (as Sb)<ref name=PGCH>{{PGCH|0036}}</ref>
| SPhrases =
| PEL = TWA 0.5 mg/m<sup>3</sup> (as Sb)<ref name=PGCH/>
⚫ | NFPA-H = 2
⚫ }}
| NFPA-F = 1
⚫ |Section8={{Chembox Related
| NFPA-R = 0
⚫ | OtherAnions =
⚫ }}
⚫ | OtherCations =
⚫ | Section8 = {{Chembox Related
⚫ | OtherCompounds = ]<br />]
⚫ | OtherAnions =
⚫ }}
⚫ | OtherCations =
⚫ | OtherCpds = ]<br />]
⚫ }}
}} }}


'''Antimony tetroxide''' is an ] with the formula Sb<sub>2</sub>O<sub>4</sub>. This material, which exists as the mineral cervantite,<ref>{{cite web| url = http://webmineral.com/data/Cervantite.shtml| title = Cervantite| accessdate = 2009-06-06| publisher = Webminerals}}</ref> is white but reversibly yellows upon heating. The material, with empirical formula SbO<sub>2</sub>, is called antimony tetroxide to signify the presence of two kinds of Sb centers. '''Antimony tetroxide''' is an ] with the formula Sb<sub>2</sub>O<sub>4</sub>. This material, which exists as the mineral cervantite,<ref>{{cite web| url = http://webmineral.com/data/Cervantite.shtml| title = Cervantite| access-date = 2009-06-06| publisher = Webminerals}}</ref> is white but reversibly yellows upon heating. The material, with empirical formula SbO<sub>2</sub>, is called antimony tetroxide to signify the presence of two kinds of Sb centers.<ref name="G&E">{{Greenwood&Earnshaw2nd|page=576}}</ref>


==Formation and structure== ==Formation and structure==
The material forms when ] is heated in air:<ref>Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.</ref> The material forms when ] is heated in air:<ref>Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. {{ISBN|0-12-352651-5}}.</ref>
:Sb<sub>2</sub>O<sub>3</sub> + 0.5 O<sub>2</sub> → Sb<sub>2</sub>O<sub>4</sub> ΔH = −187 kJ/mol :Sb<sub>2</sub>O<sub>3</sub> + 0.5 O<sub>2</sub> → Sb<sub>2</sub>O<sub>4</sub> ΔH = −187 kJ/mol
At 800 °C, ] loses oxygen to give the same material: At 800 °C, ] loses oxygen to give the same material:
:Sb<sub>2</sub>O<sub>5</sub> → Sb<sub>2</sub>O<sub>4</sub> + 0.5 O<sub>2</sub> ΔH = −64 kJ/mol :Sb<sub>2</sub>O<sub>5</sub> → Sb<sub>2</sub>O<sub>4</sub> + 0.5 O<sub>2</sub> ΔH = −64 kJ/mol


The material is mixed valence, containing both Sb(V) and Sb(III) centers. Two ] are known, one orthorhombic (shown in the infobox) and one monoclinic.<ref name="Amador">J. Amador, E. Gutierrez Puebla, M. A. Monge, I. Rasines, and C. Ruiz Valero "Diantimony Tetraoxides Revisited" Inorganic Chemistry 1988, Volume 27, pp. 1367–1370. {{DOI|10.1021/ic00281a011}}</ref> Both forms feature octahedral Sb(V) centers arranged in sheets with distorted Sb(III) centers bound to four oxides. The material is mixed valence, containing both Sb(V) and Sb(III) centers. Two ] are known, one orthorhombic (shown in the infobox) and one monoclinic.<ref name="Amador">{{cite journal | last1 = Amador | first1 = J. | last2 = Puebla | first2 = E. Gutierrez | last3 = Monge | first3 = M. A. | last4 = Rasines | first4 = I. | last5 = Valero | first5 = C. Ruiz | year = 1988 | title = Diantimony Tetraoxides Revisited | journal = Inorganic Chemistry | volume = 27 | issue = 8 | pages = 1367–1370 | doi = 10.1021/ic00281a011 }}</ref> Both forms feature octahedral Sb(V) centers arranged in sheets with distorted Sb(III) centers bound to four oxides.


==References== ==References==
Line 56: Line 67:


{{Antimony compounds}} {{Antimony compounds}}
{{Oxides}}


] ]
] ]
] ]

]
]

Latest revision as of 05:33, 17 November 2024

Antimony tetroxide
α-Sb2O4
β-Sb2O4

  Sb   O
Names
IUPAC name antimony(III,V) oxide
Identifiers
CAS Number
ChemSpider
ECHA InfoCard 100.014.161 Edit this at Wikidata
EC Number
  • 215-576-0
PubChem CID
UNII
CompTox Dashboard (EPA)
Properties
Chemical formula SbO2; Sb2O4
Molar mass 153.7588; 307.5176 g/mol
Appearance white solid
Density 6.64 g/cm (orthorhombic form)
Melting point > 930 °C (1,710 °F; 1,200 K) (decomposes)
Boiling point decomposes
Solubility in water insoluble
Refractive index (nD) 2.0
Structure
Crystal structure orthorhombic
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2 1 0
NIOSH (US health exposure limits):
PEL (Permissible) TWA 0.5 mg/m (as Sb)
REL (Recommended) TWA 0.5 mg/m (as Sb)
Related compounds
Related compounds Antimony trioxide
Antimony pentoxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

Antimony tetroxide is an inorganic compound with the formula Sb2O4. This material, which exists as the mineral cervantite, is white but reversibly yellows upon heating. The material, with empirical formula SbO2, is called antimony tetroxide to signify the presence of two kinds of Sb centers.

Formation and structure

The material forms when Sb2O3 is heated in air:

Sb2O3 + 0.5 O2 → Sb2O4 ΔH = −187 kJ/mol

At 800 °C, antimony(V) oxide loses oxygen to give the same material:

Sb2O5 → Sb2O4 + 0.5 O2 ΔH = −64 kJ/mol

The material is mixed valence, containing both Sb(V) and Sb(III) centers. Two polymorphs are known, one orthorhombic (shown in the infobox) and one monoclinic. Both forms feature octahedral Sb(V) centers arranged in sheets with distorted Sb(III) centers bound to four oxides.

References

  1. ^ Amador, J.; Puebla, E. Gutierrez; Monge, M. A.; Rasines, I.; Valero, C. Ruiz (1988). "Diantimony Tetraoxides Revisited". Inorganic Chemistry. 27 (8): 1367–1370. doi:10.1021/ic00281a011.
  2. ^ NIOSH Pocket Guide to Chemical Hazards. "#0036". National Institute for Occupational Safety and Health (NIOSH).
  3. "Cervantite". Webminerals. Retrieved 2009-06-06.
  4. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 576. ISBN 978-0-08-037941-8.
  5. Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
Antimony compounds
Antimonides
Sb(III)
Organoantimony(III) compounds
Sb(III,V)
Sb(V)
Organoantimony(V) compounds
Oxides
Mixed oxidation states
+1 oxidation state
+2 oxidation state
+3 oxidation state
+4 oxidation state
+5 oxidation state
+6 oxidation state
+7 oxidation state
+8 oxidation state
Related
Oxides are sorted by oxidation state. Category:Oxides
Categories:
Antimony tetroxide: Difference between revisions Add topic