Holmium acetate

Holmium acetate ;
Names:	holmium(III) acetate; holmium tricetate; holmium(III) ethanoate;
Formula:	Ho(CH3COO)3 (anhydrous); Ho(CH3COO)3 · 4H2O (tetrahydrate);
Molar mass:	342.061 g/mol (anhydrous); 414.121 g/mol (tetrahydrate);
Crystal system:	triclinic (tetrahydrate);
Shapes:	https://en.crystalls.info/w/uploads/media/5/51/Rhombic_pedion.json Rhombic pedion https://en.crystalls.info/w/uploads/media/f/ff/Parallelogram.json Parallelogram https://en.crystalls.info/w/uploads/media/b/bc/Rhombic_prism.json Rhombic prism ;
Color:	pale-yellow;
Decomposition point:	327 °C600.15 K <br />620.6 °F <br />1,080.27 °R <br /> (anhydrous);
Magnetic properties:	paramagnetic;
Stability:	stable (tetrahydrate);
Hardness:	fragile;
Toxicity:	moderately toxic

Description

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

Precursors

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

Chemical equation:

6CH₃COOH + Ho₂O₃ = 2Ho(CH₃COO)₃ + 3H₂O

3CH₃COOH + Ho(OH)₃ = Ho(CH₃COO)₂ + 3H₂O

6CH₃COOH + Ho₂(CO₃)₃ = 2Ho(CH₃COO)₃ + 3H₂O + 3CO₂↑

For preparation of 100.00g of holmium acetate

tetrahydratetetrahydrate
anhydrous

а 61.56g of holmium carbonate or 52.15g of hydroxide or 45.62g of oxide and 62.15g of

70%70%
30%
9%

acetic acid is required.

Add acid to the flask, then add small parts of holmium 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

Keep in its original form or under several layers of varnish at average humidity and room temperature. Do not keep crystals near heaters.

Solubility

Soluble in water.

Gallery

Holmium acetateBrain&Force, Imgur galleryBrain&ForceImgur gallery
Holmium acetateBrain&Force, Imgur galleryBrain&ForceImgur gallery
Crystal under polarizing microscopeHolmium acetate, Brain&Force, Imgur galleryBrain&ForceImgur gallery
Crystal under polarizing microscopeHolmium acetate, Brain&Force, Imgur galleryBrain&ForceImgur gallery

Sources

Acetates

Salts

Calcium acetate (Ca(CH₃COO)₂) • Copper(II) acetate (Cu(CH₃COO)₂) • Chromium(II) acetate (Cr(CH₃COO)₂) • Gadolinium acetate (Gd(CH₃COO)₃) • Dysprosium acetate (Dy(CH₃COO)₃) • Holmium acetate (Ho(CH₃COO)₃) • Iron(II) acetate (Fe(CH₃COO)₂) • Lead(II) acetate (Pb(CH₃COO)₂) • Manganese(II) acetate (Mn(CH₃COO)₂) • Neodymium acetate (Nd(CH₃COO)₃) • Nickel acetate (Ni(CH₃COO)₂) • Samarium acetate (Sm(CH₃COO)₃) • Strontium acetate (Sr(CH₃COO)₂) • Sodium acetate (NaCH₃COO) • Zinc acetate (Zn(CH₃COO)₂)

Double Salts

Copper-calcium acetate (CuCa(CH₃COO)₄) • Uranyl-sodium acetate (NaUО2(CH₃COO)₃) • Uranyl-zinc-sodium acetate (NaZn(UO₂)₃(CH₃COO)₉)

Holmium compounds
Holmium acetate (Ho(CH₃COO)₃) • Holmium sulfate (Ho₂(SO₄)₃)

Holmium acetate
Names:	holmium(III) acetate holmium tricetate holmium(III) ethanoate
Formula:	Ho(CH₃COO)₃ (anhydrous) Ho(CH₃COO)₃ · 4H₂O (tetrahydrate)
Molar mass:	342.061 g/mol (anhydrous) 414.121 g/mol (tetrahydrate)
Crystal system:	triclinic (tetrahydrate)
Shapes:	Rhombic pedion Parallelogram Rhombic prism
Color:	pale-yellow
Decomposition point:	327 °C600.15 K <br />620.6 °F <br />1,080.27 °R <br /> (anhydrous)
Magnetic properties:	paramagnetic
Stability:	stable (tetrahydrate)
Hardness:	fragile
Toxicity:	moderately toxic