Holmium acetate: Difference between revisions
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==Applications== |
==Applications== |
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Holmium acetate is used in the manufacture of [[ceramics]], [[glass]], [[phosphors]], [[metal halide]] lamps, and as a [[dopant]] in [[garnet]] [[lasers]]. It is also used in [[nuclear reactors]] to keep the chain reaction in check.<ref name="metall">{{cite web|access-date= |
Holmium acetate is used in the manufacture of [[ceramics]], [[glass]], [[phosphors]], [[metal halide]] lamps, and as a [[dopant]] in [[garnet]] [[lasers]]. It is also used in [[nuclear reactors]] to keep the chain reaction in check.<ref name="metall">{{cite web|access-date=2014-01-01|title=Holmium acetate|url=http://www.metall.com.cn/hoac.htm}}</ref> |
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==References== |
==References== |
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Revision as of 07:12, 25 June 2022
_acetate.jpg)
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| Names | |
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| Other names
Holmium(III) acetate
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| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.042.773 |
PubChem CID
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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 hemihepthydate decomposes at 105 °C，forming into a hemihydrate，further decomposing at 135 °C into an anhydride. Further adding heat will form Ho(OH)(CH3COO)2, HoO(CH3COO) then Ho2O2CO3, forming holmium oxide at 590 °C.[3]
Applications
Holmium acetate is used in the manufacture of ceramics, glass, phosphors, metal halide lamps, and as a dopant in garnet lasers. It is also used in nuclear reactors to keep the chain reaction in check.[4]
References
- ^ Chen, Jiayun; Yu, Zhicun; Jiang, Xin; Xu, Jianwen. 醋酸钬晶体的制作方法 (lit. Preparation of holmium acetate crystals). CN 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.
- ^ 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.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ "Holmium acetate". Retrieved 2014-01-01.
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.
