Holmium acetate
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| Names | |
|---|---|
| Other names
Holmium(III) acetate
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| Identifiers | |
| ECHA InfoCard | 100.042.773 |
CompTox Dashboard (EPA)
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| Properties | |
| Ho(CH3COO)3 | |
| Appearance | crystals |
| soluble | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Holmium acetate is the acetate salt of holmium, with a chemical formula of Ho(CH3COO)3.
Preparation
Holmium acetate can be obtained by dissolving holmium carbonate in acetic acid：[1]
- Ho2(CO3)3 + 6 CH3COOH → 2 (CH3COO)3Ho + 3 H2O + 3 CO2↑
Dissolving holmium oxide in acetic acid at a pH of 4 will form the tetrahydrate of holmium acetate (Ho2(CH3COO)6·4H2O): [2]
- Ho2O3 + 6 CH3COOH → 2 Ho(CH3COO)3 + 3 H2O
Physical properties
Holmium acetate's 3.5 hydate decomposes at 105°C，forming into a 0.5 hydrate，further decomposing at 135 °C into an anhydrate. Further adding heat will form Ho(OH)(CH3COO)2, HoO(CH3COO) then Ho2O2CO3, forming holmium oxide at 590°C.[3]
References
- ^ 陈家运 俞志春 蒋鑫 徐建文. 醋酸钬晶体的制作方法[P]. 103360234A. 2012
- ^ Anna Mondry, Krystyna Bukietyńska (1991-08-01). "Spectral intensities of holmium acetate single crystals". Inorganica Chimica Acta. 186 (1): 135–138. doi:10.1016/S0020-1693(00)87943-8. ISSN 0020-1693. Retrieved 2019-02-01.
- ^ G. A. M. Hussein, B. A. A. Balboul, G. A. H. Mekhemer (2000-11-01). "Holmium oxide from holmium acetate, formation and characterization: thermoanalytical studies". Journal of Analytical and Applied Pyrolysis. 56 (2): 263–272. doi:10.1016/S0165-2370(00)00100-5. ISSN 0165-2370. Archived from the original on 2015-09-24. Retrieved 2019-02-01.
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External reading
- R. S. Kolat, J. E. Powell (1962-05-01). "Acetate Complexes of the Rare Earth and Several Transition Metal Ions". Inorganic Chemistry. 1 (2): 293–296. doi:10.1021/ic50002a019. ISSN 0020-1669. Retrieved 2019-02-01.
