Holmium acetate

Short description: Compound of holmium

Holmium acetate

Names
Other names

Holmium(III) acetate

Identifiers

CAS Number

* 25519-09-9 anhydrous

3D model (JSmol)

* Interactive image

ChemSpider |

* 147291

EC Number |

* 247-066-9

PubChem CID

* 168384

InChI

* InChI=1S/3C2H4O2.Ho/c3*1-2(3)4;/h3*1H3,(H,3,4);/q;;;+3/p-3

Key: HWQRVFRWLQGBFV-UHFFFAOYSA-K

SMILES

* CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].[Ho+3]

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

Holmium in acetic acid

Holmium acetate is the acetate salt of holmium, with a chemical formula of Ho(CH3COO)3[1] as well as at least one hydrate.

## Contents

* 1 Preparation
* 2 Physical properties and structure
* 3 Applications
* 4 References
* 5 External reading

## Preparation

Holmium acetate can be obtained by dissolving holmium oxide in hot acetic acid[2]

Ho2O3 \+ 6 CH3CO2H → 2 Ho(O2CH3)3 \+ 3 H2O

Dissolving holmium oxide in acetic acid at a pH of 4 will form the tetrahydrate of holmium acetate (Ho2(CH3COO)6·4H2O):[3] The anhydrous material can be obtained by heating the hydrated acetate in acetic acid.[1]

## Physical properties and structure

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.[4]

According to X-ray crystallography, anhydrous holmium acetate is a coordination polymer. Each Ho(III) center is nine-coordinate, with two bidentate acetate ligands and the remaining sites occupied by oxygens provided by bridging acetate ligands. The lanthanum and praseodymium compounds are isostructural.[1] In a second polymorph, holmium acetate has 8-coordination.[2] A tetrahydrate has also been crystallized.[5]

## 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.[6]

## References

1. ↑ 1.0 1.1 1.2 Lossin, Adalbert; Meyer, Gerd (1994). "Pr(CH3COO)3, ein wasserfreies Selten-Erd-Acetat mit Netzwerkstruktur". Zeitschrift für Anorganische und Allgemeine Chemie 620 (3): 438–443. doi:10.1002/zaac.19946200306.
2. ↑ 2.0 2.1 Lossin, Adalbert; Meyer, Gerd (1993). "Wasserfreie Selten-Erd-Acetate, M(CH3COO)3 (M = Sm-Lu, Y) mit Kettenstruktur. Kristallstrukturen von Lu(CH3COO)3 und Ho(CH3COO)3". Zeitschrift für Anorganische und Allgemeine Chemie 619 (9): 1609–1615. doi:10.1002/zaac.19936190917.
3. ↑ 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.
4. ↑ 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. Bibcode: 2000JAAP...56..263H.
5. ↑ Bats, J. W.; Kalus, R.; Fuess, H. (1979). "Holmium triacetate tetrahydrate". Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry 35 (5): 1225–1227. doi:10.1107/S0567740879005987. Bibcode: 1979AcCrB..35.1225B.
6. ↑ "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

Holmium compounds

* HoBr3
* HoCl3
* Ho2O3
* Ho2Ti2O7

* 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

0.00

(0 votes)

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

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Holmium_acetate&oldid=4035864"
*[CID]: Compound ID
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template