Holmium acetate

Holmium acetate
Names
	Other names Holmium(III) acetate
Identifiers
CAS Number	25519-09-9 ;
3D model (JSmol)	Interactive image;
PubChem CID	4152420;
	InChI InChI=1S/3C2H4O2.Ho/c31-2(3)4;/h31H3,(H,3,4); Key: NKWMPWXATGULJJ-UHFFFAOYSA-N;
	SMILES CC(=O)O.CC(=O)O.CC(=O)O.[Ho];
Properties
Chemical formula	Ho(CH3COO)3
Appearance	crystals
Solubility in water	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).
	Infobox references

Short description: Compound of holmium

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'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.
↑ "Holmium acetate". http://www.metall.com.cn/hoac.htm.

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.

v t e Acetyl halides and salts of the acetate ion
AcOH																	He
LiOAc	Be(OAc)₂ BeAcOH											B(OAc)₃	AcOAc ROAc	NH₄OAc	AcOOH	FAc	Ne
NaOAc	Mg(OAc)₂											Al(OAc)₃ ALSOL Al(OAc)₂OH Al₂SO₄(OAc)₄	Si	P	S	ClAc	Ar
KOAc	Ca(OAc)₂	Sc(OAc)₃	Ti(OAc)₄	VO(OAc)₃	Cr(OAc)₂ Cr(OAc)₃	Mn(OAc)₂ Mn(OAc)₃	Fe(OAc)₂ Fe(OAc)₃	Co(OAc)₂, Co(OAc)₃	Ni(OAc)₂	Cu(OAc)₂	Zn(OAc)₂	Ga(OAc)₃	Ge	As(OAc)₃	Se	BrAc	Kr
RbOAc	Sr(OAc)₂	Y(OAc)₃	Zr(OAc)₄	Nb	Mo(OAc)₂	Tc	Ru(OAc)₂ Ru(OAc)₃ Ru(OAc)₄	Rh₂(OAc)₄	Pd(OAc)₂	AgOAc	Cd(OAc)₂	In	Sn(OAc)₂ Sn(OAc)₄	Sb(OAc)₃	Te	IAc	Xe
CsOAc	Ba(OAc)₂		Hf	Ta	W	Re	Os	Ir	Pt(OAc)₂	Au	Hg₂(OAc)₂, Hg(OAc)₂	TlOAc Tl(OAc)₃	Pb(OAc)₂ Pb(OAc)₄	Bi(OAc)₃	Po	At	Rn
Fr	Ra		Rf	Db	Sg	Bh	Hs	Mt	Ds	Rg	Cn	Nh	Fl	Mc	Lv	Ts	Og
		↓
		La(OAc)₃	Ce(OAc)_x	Pr	Nd	Pm	Sm(OAc)₃	Eu(OAc)₃	Gd(OAc)₃	Tb	Dy(OAc)₃	Ho(OAc)₃	Er	Tm	Yb(OAc)₃	Lu(OAc)₃
		Ac	Th	Pa	UO₂(OAc)₂	Np	Pu	Am	Cm	Bk	Cf	Es	Fm	Md	No	Lr

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Original source: https://en.wikipedia.org/wiki/Holmium acetate. Read more

[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.

[metall-4] "Holmium acetate". http://www.metall.com.cn/hoac.htm.

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