Chemistry:Sodium metavanadate
From HandWiki
| File:NaVO3.tif | |
| Names | |
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| IUPAC name
Sodium trioxovanadate(V)
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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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) | |
| 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). | |
 verify (what is   ?)
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| Infobox references | |
Tracking categories (test):
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". Acta Crystallogr. B40 (2): 102–105. doi:10.1107/S0108768184001828. Bibcode: 1984AcCrB..40..102K.
- ↑ Domaille, Peter J. (2007). "Vanadium(V) Substituted Dodecatungstophosphates". Inorganic Syntheses. 27. pp. 96–104. doi:10.1002/9780470132586.ch17. ISBN 9780470132586.
- ↑ "Munirite". http://www.mindat.org/min-2680.html.
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