Sodium metavanadate
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Names | |
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IUPAC name
Sodium trioxovanadate(V)
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Identifiers | |
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3D model (JSmol)
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ChEBI | |
ECHA InfoCard | 100.033.869 ![]() |
EC Number |
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PubChem CID
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RTECS number |
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
NaVO3 | |
Molar mass | 121.9295 g/mol |
Appearance | yellow crystalline solid |
Density | 2.84g/cm3 |
Melting point | 630 °C (1,166 °F; 903 K) |
19.3 g/100 mL (20 °C) 40.8 g/100 mL (80 °C) | |
Thermochemistry | |
Heat capacity (C)
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97.6 J/mol K |
Std molar
entropy (S |
113.8 J/mol K |
Std enthalpy of
formation (ΔfH⦵298) |
−1148 kJ/mol |
Hazards | |
Main hazards | Toxic, irritant |
NFPA 704 (fire diamond) | ![]()
2
0
0 |
Flash point | Non-flammable |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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98 mg/kg (rat, oral) |
Related compounds | |
Other anions
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Sodium orthovanadate |
Other cations
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Ammonium metavanadate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Infobox references | |
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/76/Ammonium-metavanadate-chains-3D.png/200px-Ammonium-metavanadate-chains-3D.png)
Chain of tetrahedral vanadate [VO4]− units, each sharing two corners
Sodium metavanadate is the inorganic compound with the formula NaVO3.[1] It is a yellow, water-soluble salt.
Sodium metavanadate is a common precursor to other vanadates. At low pH it converts to sodium decavanadate. It is also precursor to exotic metalates such as [γ-PV2W10O40]5-, [α-PVW11O40]4-, and [β-PV2W10O40]5-.[2]
Minerals[]
Sodium metavanadate occurs as two minor minerals, (anhydrous) and a dihydrate, . Both are very rare, metamunirite is now known only from vanadium- and uranium-bearing sandstone formations of central-western USA and munirite from Pakistan and South Africa.[3]
References[]
- ^ Kato, K.; Takayama, E. (1984). "Das Entwässerungsverhalten des Natriummetavanadatdihydrats und die Kristallstruktur des beta-Natriummetavanadats" [The dehydration activity of sodium metavanadate dihydrate and the crystal structure of β-sodium metavanadate]. Acta Crystallogr. B40 (2): 102–105. doi:10.1107/S0108768184001828.
- ^ Domaille, Peter J. (2007). "Vanadium(V) Substituted Dodecatungstophosphates". Inorganic Syntheses: 96–104. doi:10.1002/9780470132586.ch17. ISBN 9780470132586.
- ^ "Munirite". Mindat.
Categories:
- Vanadates
- Sodium compounds
- Inorganic compound stubs