Samarium acetate
From Crystal growing
More languages
More actions
| Samarium acetate | |
|---|---|
| Names: | samarium(III) acetate samarium triacetate samarium(III) ethanoate |
| Formula: | Sm(CH3COO)3 (anhydrous) Sm(CH3COO)3 · 3H2O (trihydrate) |
| Molar mass: | 327.491 g/mol (anhydrous) 381.536 g/mol (trihydrate) |
| Density: | 1.94 g/cm3 (trihydrate) |
| Crystal system: | tetragonal (trihydrate) α=90°, β=90°, γ=90° |
| Shapes: | |
| Color: | light yellow |
| Stability: | erodes (trihydrate) |
| Hardness: | fragile |
| Toxicity: | moderately toxic |
Description
Organic compound, salt of trivalent rare earth metal samarium and organic acetic acid. From water solutions crystallizes as trihydrate.
Reaction between samarium(III) oxide, hydroxide or carbonate and acetic acid
Chemical equation:
For preparation of
100.00g of samarium acetate trihydrate а 63.00g of carbonate or 52.78g of hydroxide or 45.70g of samarium oxide and 67.45g of 70% acetic acid is required.Add acid to the flask, then add small parts of samarium 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.
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.
| Temperature | g/100,00 g water | |
|---|---|---|
| (anhydrous) | (trihydrate) | |
| 25°C298.15 K <br />77 °F <br />536.67 °R <br /> | ~12.6 | 15 |
Gallery
Sources
Navigation