“Holmium(III) chloride”的意思、由来-开放百科全书

词条

Holmium(III) chloride

释义

Preparation
Structure
References

{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 439252335
| Name = Holmium(III) chloride
| OtherNames = Holmium trichloride
Holmiumchlorid
| ImageFile = Aluminium-trichloride-crystal-3D-balls.png
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 10138-62-2
| CASNo2_Ref = {{cascite|changed|??}}
| CASNo2 = 14914-84-2
| CASNo2_Comment = (hexahydrate)
| UNII_Ref = {{fdacite|changed|FDA}}
| UNII = CAR334HOLD
| PubChem = 24992
|Section2={{Chembox Properties
| Formula = HoCl₃
| Appearance = yellow crystals
hygroscopic
| Density = 3.7 g/cm³
| MolarMass = 271.289 g/mol
| Solubility = dissolves
| MeltingPtC = 720
| MeltingPt_ref = ^[1]
| BoilingPtC = 1500
| BoilingPt_notes = (decomposes)
|Section3={{Chembox Structure
| CrystalStruct = Monoclinic, mS16
| SpaceGroup = C12/m1, No. 12
|Section7={{Chembox Hazards
| ExternalMSDS =
|Section8={{Chembox Related
| OtherAnions = Holmium(III) oxide
| OtherCations = Dysprosium(III) chloride, Erbium(III) chloride
}}

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:^[2]

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

Structure

In the solid state it has the YCl₃ layer structure.^[3]

References

1. ^{{RubberBible87th}}
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}}

3 : Holmium compounds|Chlorides|Metal halides

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