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Sodium trioxalatoaluminate

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   Sodium trioxalatoaluminate   
Names: алюмоsodium oxalate
sodium oxalatоaluminate
sodium trioxalatоaluminate
sodium tris(oxalato)aluminate
Formula: Na3[Al(C2O4)3] (anhydrous)
Na3[Al(C2O4)3] · 5H2O (pentahydrate)
Molar mass: 360.006 g/mol (anhydrous)
450.080 g/mol (pentahydrate)
Crystal system: monoclinic (pentahydrate)
α=90°, γ=90°
Shapes:
https://en.crystalls.info/w/uploads/media/5/50/Beveled_tetragonal_prism.json
Beveled tetragonal prism

Color: colorless
Stability: erodes (pentahydrate)

Description

Organic coordination complex, salt of transitional metal aluminum, alkaline metal sodium and organic oxalic acid. From water solutions crystallizes as pentahydrate.

Precursors

Reaction between metal aluminum, sodium hydroxide and oxalic acid.

Chemical equation:

2Al + 6NaOH + 6H2C2O4 = 2Na3[Al(C2O4)3] + 6H2O + ЗН2↑


For preparation of 100.00g of sodium trioxalatoaluminate pentahydrate а 5.99g of aluminum, 26.66g of sodium hydroxide and 84.03g of oxalic acid dihydrate is required.

Add alkali solution to the flask, then add aluminum pieces, shavings or powder and stir it until gas emission will stop.Add to the flask with oxalic acid a aluminum in alkali solution with stirring. After reaction will stop, filter the solution and use it for crystal growing.

Reaction between aluminum hydroxide and sodium hydrooxalate

Chemical equation:

Al(OH)3 + 3NaHC2O4 = Na3[Al(C2O4)3] + 3H2O


For preparation of 100.00g of sodium trioxalatoaluminate pentahydrate а 17.33g of aluminum hydroxide and 86.67g of sodium hydrooxalate monohydrate is required.

Add to the flask with aluminum hydroxide solution a hot sodium hydrooxalate solution with stirring. After reaction will stop, filter the solution and use it for crystal growing.

Reaction between aluminum hydroxide, sodium oxalate and oxalic acid

Chemical equation:

2Al(OH)3 + 3Na2C2O4 + 3H2C2O4 = 2Na3[Al(C2O4)3] + 6H2O


For preparation of 100.00g of sodium trioxalatoaluminate pentahydrate а 17.33g of aluminum hydroxide, 50.66g of sodium oxalate monohydrate and 42.01g of oxalic acid dihydrate is required.

Add to the flask with aluminum hydroxide solution a hot sodium oxalate and oxalic acid solution with stirring. After reaction will stop, filter the solution and use it for crystal growing.

Influence of pH level

Acidic solutions lead to growing flat plates.

Storage conditions

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

Solubility

Temperatureg/100,00 g water
20°C293.15 K <br />68 °F <br />527.67 °R <br />~50



Sources



   Oxalates
Salts

Ammonium oxalate ((NH4)2C2O4) • Cobalt(II) oxalate (CoC2O4) • Diglycine oxalate ((NH2CH2COOH)3 · H2C2O4) • Neodymium oxalate (Nd2(C2O4)3) • Oxalic acid (H2C2O4) • Sodium oxalate (Na2C2O4) • Tris(ethylenediamine)nickel oxalate ([Ni(H2NCH2CH2NH2)3]C2O4)

Dioxalatocuprates

Ammonium dioxalatocuprate(II) ((NH4)2[Cu(C2O4)2]) • Potassium dioxalatocuprate(II) (K2[Cu(C2O4)2]) • Sodium dioxalatocuprate(II) (Na2[Cu(C2O4)2])

Trioxalatoaluminates

Potassium trioxalatoaluminate (K3[Al(C2O4)3]) • Sodium trioxalatoaluminate (Na3[Al(C2O4)3])

Trioxalatochromates

Potassium trioxalatochromate(III) (K3[Cr(C2O4)3]) • Sodium trioxalatochromate(III) (Ns3[Cr(C2O4)3])

Trioxalatocobaltates

Potassium trioxalatocobaltate(III) (K3[Co(C2O4)3])

Trioxalatoferrates

Ammonium trioxalatoferrate(III) ((NH4)3[Fe(C2O4)3]) • Lithium trioxalatoferrate(III) (Li3[Fe(C2O4)3]) • Lithium trioxalatoferrate(III)-chloride (Li4[Fe(C2O4)3]Cl) Potassium trioxalatoferrate(III) (K3[Fe(C2O4)3]) • Potassium-sodium trioxalatoferrate(III) (K5Na[Fe(C2O4)3]2) • Sodium trioxalatoferrate(III) (Na3[Fe(C2O4)3])

Ethers

Dimethyl oxalate ((CH3)2C2O4)



   Aluminum compounds
Simple

Aluminum sulfate (Al2(SO4)3) • Aluminum-ammonium sulfate (NH4Al(SO4)2) • Aluminum-potassium sulfate (KAl(SO4)2)

Complex


   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 trichloroacetate (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 adduct (2C6H12O6 · NaBr) • Glucose and sodium chloride adduct (2C6H12O6 · NaCl) • Urea and sodium chloride adduct (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])

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