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Holmium(III) chloride

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Holmium(III) chloride
Names
Other names Holmium trichloride, Holmiumchlorid
Identifiers
CAS Number
ECHA InfoCard 100.030.339 Edit this at Wikidata
CompTox Dashboard (EPA)
Properties
Chemical formula HoCl3
Molar mass 271.20 g/mol
Appearance yellow crystals
hygroscopic
Density 3.7 g/cm
Melting point 720 °C
Boiling point 1500 °C (decomp)
Solubility in water dissolves
Structure
Crystal structure Monoclinic, mS16
Space group C12/m1, No. 12
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

Holmium(III) chloride is the inorganic compound with the formula HoCl3. It is a common salt but is mainly used in research. It exhibits the same color-changing behavior seen in holmium oxide, being a yellow in natural lighting and a bright pink color in fluorescent lighting.

Preparation

It forms upon union of the elements, but a more commonly used method involves heating a mixture of holmium(III) oxide and ammonium chloride at 200-250 °C:

Ho2O3 + 6 NH4Cl → 2 HoCl3 + 6 NH3 + 2 H2O

Structure

In the solid state it has the YCl3 layer structure.

References

  1. Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, Florida: CRC Press. ISBN 0-8493-0487-3.
  2. Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY.
  3. Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford. ISBN 0-19-855370-6
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Holmium compounds
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