Gadolinium acetate

From Crystal growing

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   Gadolinium acetate   
Names: gadolinium(III) acetate
gadolinium triacetate

Formula: Gd(CH3COO)3 (anhydrous)
Gd(CH3COO)3 · 4H2O (tetrahydrate)
SMILES: CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].[Gd+3]
Molar mass: 334.381 g/mol (anhydrous)
406.441 g/mol (tetrahydrate)
Density: 1.611 g/cm3 (tetrahydrate)
Crystal system: triclinic (tetrahydrate)
a=10.79 Å, b=9.395 Å, c=8.941 Åα=60.98°, β=88.5°, γ=62.31°
Shapes:
https://media.crystalls.info/w/uploads/media/Rhombic_pedion.json
https://media.crystalls.info/w/uploads/media/Parallelogram.json
https://media.crystalls.info/w/uploads/media/Rhombic_prism.json

Color: colorless
Decomposition point: 450 °C723.15 K <br />842 °F <br />1,301.67 °R <br /> (anhydrous)
150 °C423.15 K <br />302 °F <br />761.67 °R <br /> (tetrahydrate)
Magnetic properties: paramagnetic
Stability: stable (tetrahydrate)
Hardness: fragile
Toxicity: moderately toxic

Description

Organic compound, salt of trivalent rare earth metal gadolinium and organic acetic acid. From water solutions crystallizes as tetrahydrate.

Precursors

Reaction between gadolinium (III) oxide, hydroxide or carbonate and acetic acid

Chemical equation:

6CH3COOH + Gd2O3 = 2Gd(CH3COO)3 + 3H2O
3CH3COOH + Gd(OH)3 = Gd(CH3COO)2 + 3H2O
6CH3COOH + Gd2(CO3)3 = 2Gd(CH3COO)3 + 3H2O + 3CO2


For preparation of 100.00g of gadolinium acetate tetrahydrate а 60.84g of gadolinium carbonate or 51.24g of hydroxide or 44.59g of oxide and 63.32g of 70% acetic acid is required.

Add acid to the flask, then add small parts of gadolinium compound with stirring until it will totally dissolve or, if you use carbonate, until carbon dioxide emission will stop. After reaction will stop, filter the solution and use it for crystal growing.

Storage conditions

Store in its original form or under several layers of varnish at average humidity and room temperature. Do not store in matchboxes or cotton wool and do not heat.

Solubility

Temperatureгр/100,00 гр water
(anhydrous)(tetrahydrate)
25°C298.15 K <br />77 °F <br />536.67 °R <br />9.711.6


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