Sodium metavanadate

Sodium metavanadate
Names
	IUPAC name Sodium trioxovanadate(V)
Identifiers
CAS Number	13718-26-8 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:75221 ;
ECHA InfoCard	100.033.869
EC Number	237-272-7;
PubChem CID	4148882;
RTECS number	YW1050000;
UNII	252S9L5606 ;
CompTox Dashboard (EPA)	DTXSID3044336 ;
	InChI InChI=1S/Na.3O.V/q 1;;;-1;;
	SMILES [O-][V](=O)=O.[Na ];
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
Hazards
	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). verify (what is ?) Infobox references

Sodium metavanadate is the inorganic compound with the formula NaVO₃.^[1] It is a yellow, water-soluble salt.

Chain of tetrahedral vanadate [VO₄]⁻ units, each sharing two corners

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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[1] 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.

[2] Domaille, Peter J. (2007). "Vanadium(V) Substituted Dodecatungstophosphates". Inorganic Syntheses. Vol. 27. pp. 96–104. doi:10.1002/9780470132586.ch17. ISBN 9780470132586.

[3] "Munirite". Mindat.

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