Sodium metavanadate
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IUPAC name Sodium trioxovanadate(V) | |
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ECHA InfoCard | 100.033.869 ![]() |
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Properties | |
Chemical formula | NaVO3 |
Molar mass | 121.9295 g/mol |
Appearance | yellow crystalline solid |
Density | 2.84g/cm3 |
Melting point | 630 °C (1,166 °F; 903 K) |
Solubility in water | 19.3 g/100 mL (20 °C) 40.8 g/100 mL (80 °C) |
Thermochemistry | |
Heat capacity (C) | 97.6 J/mol K |
Std molar entropy (S⦵298) | 113.8 J/mol K |
Std enthalpy of formation (ΔfH⦵298) | −1148 kJ/mol |
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Occupational safety and health (OHS/OSH): | |
Main hazards | Toxic, irritant |
NFPA 704 (fire diamond) | ![]() 2 0 0 |
Flash point | Non-flammable |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose) | 98 mg/kg (rat, oral) |
Related compounds | |
Other anions | Sodium orthovanadate |
Other cations | Ammonium metavanadate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). ![]() ![]() ![]() Infobox references |
Chemical compound
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/76/Ammonium-metavanadate-chains-3D.png/200px-Ammonium-metavanadate-chains-3D.png)
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, metamunirite (anhydrous) and a dihydrate, munirite. 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. Bibcode:1984AcCrB..40..102K. doi:10.1107/S0108768184001828.
- ^ Domaille, Peter J. (2007). "Vanadium(V) Substituted Dodecatungstophosphates". Inorganic Syntheses. Vol. 27. pp. 96–104. doi:10.1002/9780470132586.ch17. ISBN 9780470132586.
- ^ "Munirite". Mindat.
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Halides | |
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Chalcogenides | |
Pnictogenides |
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Oxyhalides | |
Oxychalcogenides |
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Oxypnictogenides |
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Others |
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- CH3ONa
- C2H5ONa
- HCOONa
- C2H5COONa
- C3H7COONa
- Na2C4H4O6
- C4H5NaO6
- NaCH3COO
- NaC6H5CO2
- NaC6H4(OH)CO2
- NaC12H23O2
- NaC10H8
- Na2[Fe[CN5]NO]
- C6H16AlNaO4
- NaC6H7O6
- C5H8NO4Na
- C6H5Na
- C4H9Na
- NaC5H5
- C15H31COONa
- C17H33COONa
- C18H35O2Na
- C164H256O68S2Na2