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Holmium acetate

From Wikipedia, the free encyclopedia

Holmium acetate
Names
Other names
Holmium(III) acetate
Identifiers
3D model (JSmol)
ECHA InfoCard 100.042.773 Edit this at Wikidata
  • InChI=1S/3C2H4O2.Ho/c3*1-2(3)4;/h3*1H3,(H,3,4);
    Key: NKWMPWXATGULJJ-UHFFFAOYSA-N
  • CC(=O)O.CC(=O)O.CC(=O)O.[Ho]
Properties
Ho(CH3COO)3
Appearance crystals
soluble
Related compounds
Other anions
 Holmium oxide
Holmium hydroxide
Other cations
 Dysprosium acetate
Erbium acetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Holmium in acetic acid

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 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

  1. ^ 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
  2. ^ 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.
  3. ^ 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)
  4. ^ "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.
This page was last edited on 13 February 2024, at 15:07
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