sodium metavanadate

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 436447057

| Name = Sodium metavanadate

| ImageFile = NaVO3.tif

| ImageSize = 300 px

| IUPACName = Sodium trioxovanadate(V)

|Section1={{Chembox Identifiers

| CASNo = 13718-26-8

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 252S9L5606

| PubChem = 4148882

| ChEBI_Ref = {{ebicite|changed|EBI}}

| ChEBI = 75221

| RTECS = YW1050000

| InChI = 1S/Na.3O.V/q+1;;;-1;

| SMILES = [O-][V](=O)=O.[Na+]

| EINECS = 237-272-7

}}

|Section2={{Chembox Properties

| Formula = NaVO₃

| MolarMass = 121.9295 g/mol

| Appearance = yellow crystalline solid

| Density = 2.84g/cm³

| Solubility = 19.3 g/100 mL (20 °C)
40.8 g/100 mL (80 °C)

| MeltingPtC = 630

| BoilingPt =

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|Section3={{Chembox Structure

| CrystalStruct =

| Coordination =

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|Section5={{Chembox Thermochemistry

| DeltaHf = −1148 kJ/mol

| Entropy = 113.8 J/mol K

| HeatCapacity = 97.6 J/mol K

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|Section7={{Chembox Hazards

| ExternalSDS =

| HPhrases =

| PPhrases =

| GHS_ref =

| MainHazards = Toxic, irritant

| NFPA-H = 2

| NFPA-F = 0

| NFPA-R = 0

| NFPA-S =

| FlashPt = Non-flammable

| LD50 = 98 mg/kg (rat, oral)

}}

|Section8={{Chembox Related

| OtherAnions = Sodium orthovanadate

| OtherCations = Ammonium metavanadate

| OtherCompounds =

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}}

Image:Ammonium-metavanadate-chains-3D.png

Sodium metavanadate is the inorganic compound with the formula NaVO₃.{{cite journal|last1=Kato|first1= K.|last2= Takayama|first2= E. |title=Das Entwässerungsverhalten des Natriummetavanadatdihydrats und die Kristallstruktur des beta-Natriummetavanadats|trans-title=The dehydration activity of sodium metavanadate dihydrate and the crystal structure of β-sodium metavanadate|journal=Acta Crystallogr.|date= 1984 |volume =B40 |issue= 2|pages=102–105|doi=10.1107/S0108768184001828|bibcode= 1984AcCrB..40..102K}} 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-.{{cite book |doi=10.1002/9780470132586.ch17|chapter=Vanadium(V) Substituted Dodecatungstophosphates|year=2007|last1=Domaille|first1=Peter J.|title=Inorganic Syntheses |volume=27 |pages=96–104|isbn=9780470132586}}