Sodium decavanadate

Sodium decavanadate ;
Names:	sodium decavanadate; hexasodium vanadate;
Formula:	Na6V10O28 (anhydrous); Na6V10O28 · 18H2O (octadecahydrate);
Molar mass:	1095.332 g/mol (anhydrous); 1419.600 g/mol (octadecahydrate);
Density:	2.42 g/cm3 (octadecahydrate);
Crystal system:	triclinic (octadecahydrate);
Shapes:	https://en.crystalls.info/w/uploads/media/7/7b/Beveled_rhombic_prism.json Beveled rhombic prism https://en.crystalls.info/w/uploads/media/3/35/Deformed_tetragonal_bipyramid.json Deformed tetragonal bipyramid ;
Color:	bright red;
Decomposition point:	~50 °C"~" is not declared as a valid unit of measurement for this property. (octadecahydrate);
Magnetic properties:	diamagnetic;
Stability:	rapidly erodes (octadecahydrate);
Hardness:	relatively strong;
Toxicity:	poisonous

Description

Inorganic compound, salt of alkaline metal sodium and inorganic decavanadic acid. From water solutions crystallizes as octadecahydrate.

Precursors

Reaction between sodium metavanadate and diluted acetic or sulfuric acid

Chemical equation:

10NaVO₃ + 4CH₃COOH = Na₆V₁₀O₂₈ + 4CH₃COONa + 2H₂O

10NaVO₃ + 12H₂SO₄ = Na₆V₁₀O₂₈ + 12Na₂SO₄ + 12H₂O

For preparation of 100.00g of sodium decavanadate

octadecahydrateoctadecahydrate
anhydrous

а 111.27g of sodium metavanadate

dihydratedihydrate
anhydrous

and 224.07g of 37%37% sulfuric or 24.17g of

70%70%
50%

acetic acid is required.

Add hot acid to the flask, then add small parts of sodium compound with stirring until heating will stop (attention, the solution may boil!) . For purifying compound from unreacted substances add large amount of cold ethanol, acetone or toluene to solution, salt will settle to the bottom in the form of fine crystals or powder. Filter precipitate and wash it with small amount of the same solvent, then filter the solution and use it for crystal growing.

Influence of pH level

It is optimal to grow crystals at 4..7 pH level. At higher levels there are such byproducts as hexavanadate or metavanadate.

Storage conditions

For crystal storing use hermetic vessel with small amount of saturated solution at the bottom or place wadding moistened with such solution. You can use such alternatives as vessel with vaseline or vegetable oil, organic non-hygroscopic solvent (kerosene, benzine or paraffin). Also you can use acrylate polymer or another kinds of solidifying plastic.

Solubility

TableGraph

Temperature	гр/`100,00` гр water
Temperature	(anhydrous)	(octadecahydrate)
30°C303.15 K <br />86 °F <br />545.67 °R <br />	`~23.2`	`~32.33`

Insoluble in ethanol, methanol, acetone, toluene and isopropanol.

Gallery

Immediately after taking out from the solutionSodium decavanadate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte
10 minutes after removing from the solutionSodium decavanadate, Vladimir Semikin, VKontakteVladimir SemikinVKontakte

Navigation

Vanadates
Potassium metavanadate (KVO₃) • Sodium decavanadate (Na₆V₁₀O₂₈) • Sodium metavanadate (NaVO₃)

Sodium compounds
Salts	Sodium acetate (NaCH₃COO) • Sodium bromide (NaBr) • Sodium citrate (Na₃C₃H₅O(COO)₃) • Sodium chlorate (NaClO₃) • Sodium chloride (NaCl) • Sodium cyclamate (C₆H₁₂NNaO₃S) • Sodium decavanadate (Na₆V₁₀O₂₈) • Sodium ethilate (NaC₂H₅O) • Sodium glutamate (NaC₅H₈NO₄) • Sodium hydrocarbonate (NaHCO₃) • Sodium hydrosulfate (NaHSO₄) • Sodium iodide (NaI) • Sodium metavanadate (NaVO₃) • Sodium niobate (NaNbO₃) • Sodium nitrate (NaNO₃) • Sodium oxalate (Na₂C₂O₄) • Sodium para-aminosalicylate (C₇H₆NNaO₃) • Sodium perchlorate (NaClO₄) • Sodium saccharinate (C₇H₄NaNO₃S) • Sodium sulfate (Na₂SO₄) • Sodium sulfide (Na₂S) • Sodium tetraborate (Na₂B₄O₇) • Sodium thiosulfate (Na₂S₂O₃) • Sodium trichloracetate (NaCCl₃COO) • Sodium trioxalatoaluminate (Na₃[Al(C₂O₄)₃]) • Sodium tungstate (Na₂WO₄)
Double salts	Potassium-sodium tartrate (KNaC₄H₄O₆) • Sodium-ammonium sulfate (NaNH₄SO₄) • Uranyl-sodium acetate (NaUО2(CH₃COO)₃) • Uranyl-zinc-sodium acetate (NaZn(UO₂)₃(CH₃COO)₉) • Zinc-sodium sulfate (Na₂Zn(SO₄)₂)
Adducts	Glucose and sodium bromide complex (2C₆H₁₂O₆ · NaBr) • Glucose and sodium chloride complex (2C₆H₁₂O₆ · NaCl) • Urea and sodium chloride complex (CO(NH₄)₂ · NaCl)
Complex compounds	Sodium dicarbonatocuprate(II) (Na₂[Cu(CO₃)₂]) • Sodium dioxalatocuprate(II) (Na₂[Cu(C₂O₄)₂]) • Sodium ethylenediaminetetraacetate-ferrate(III) (Na[Fe((OOCCH₂)₂N(CH₂)₂N(CH₂COO)₂)]) • Sodium hexacyanoferrate(II) (Na₄[Fe(CN)₆]) • Tripotassium-sodium hexacyanoferrate(II) (K₃Na[Fe(CN)₆]) • Sodium hexafluorosilicate (Na₂[SiF₆]) • Sodium nitroprusside (Na₂[Fe(CN)₅NO]) • Sodium trioxalatochromate(III) (Ns₃[Cr(C₂O₄)₃]) • Dipotassium-sodium trioxalatoferrate(III) (K₂Na[Fe(C₂O₄)₃]) • Potassium-sodium trioxalatoferrate(III) (K₅Na[Fe(C₂O₄)₃]₂) • Sodium trioxalatoferrate(III) (Na₃[Fe(C₂O₄)₃])

Sodium decavanadate
Names:	sodium decavanadate hexasodium vanadate
Formula:	Na₆V₁₀O₂₈ (anhydrous) Na₆V₁₀O₂₈ · 18H₂O (octadecahydrate)
Molar mass:	1095.332 g/mol (anhydrous) 1419.600 g/mol (octadecahydrate)
Density:	2.42 g/cm³ (octadecahydrate)
Crystal system:	triclinic (octadecahydrate)
Shapes:	Beveled rhombic prism Deformed tetragonal bipyramid
Color:	bright red
Decomposition point:	~50 °C"~" is not declared as a valid unit of measurement for this property. (octadecahydrate)
Magnetic properties:	diamagnetic
Stability:	rapidly erodes (octadecahydrate)
Hardness:	relatively strong
Toxicity:	poisonous