Holmium(III) fluoride

Holmium(III) fluoride
Identifiers
CAS Number	13760-78-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	75531;
ECHA InfoCard	100.033.942
EC Number	237-352-1;
PubChem CID	83709;
UNII	XU9F7TR3LU ;
CompTox Dashboard (EPA)	DTXSID3065611 ;
	InChI InChI=1S/3FH.Ho/h3*1H;/q;;;+3/p-3 Key: FDIFPFNHNADKFC-UHFFFAOYSA-K;
	SMILES F[Ho](F)F;
Properties
Chemical formula	HoF3
Molar mass	221.93
Appearance	yellowish powder
Density	7.64g/cm3
Melting point	1145 °C
Boiling point	>2200 °C
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H311, H315, H319, H331, H335
Precautionary statements	P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P311, P312, P321, P322, P330, P332+P313, P337+P313, P361, P362, P363, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Holmium(III) fluoride is an inorganic compound with a chemical formula of HoF₃.

Preparation[edit]

Holmium(III) fluoride can be produced by reacting holmium oxide and ammonium fluoride, then crystallising it from the ammonium salt formed in solution:^[3]

Ho₂O₃ + 6NH₄F ⟶ 2HoF₃ + 6NH₃ + 2H₂O

It can also be prepared by directly reacting holmium with fluorine:^[4]

2Ho + 3F₂ → 2HoF₃

Properties[edit]

Holmium(III) fluoride is a yellowish powder that is insoluble in water.^[5] It has an orthorhombic crystal system (corresponding to β-YF₃^[6]) with the space group Pnma (space group no. 62).^[7] However, there is also a trigonal low-temperature form of the lanthanum(III) fluoride type.^[3]

References[edit]

^ ^a ^b "Holmium Fluoride".
^ Shaimuradov, I. B.; Reshetnikova, L. P.; Novoselova, A. V. Phase diagram of the potassium fluoride-holmium fluoride system. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1974. 10 (8). 1468-1471. ISSN 0002-337X.
^ ^a ^b Janiak, Christoph; Meyer, Hans-Jürgen; Gudat, Dietrich; Alsfasser, Ralf (2012-01-27). Riedel Moderne Anorganische Chemie (in German). Walter de Gruyter. ISBN 978-3-11-024901-9.
^ "Chemical reactions of Holmium". Webelements. Retrieved 2009-06-06.
^ Holmium(III) fluoride at AlfaAesar, accessed on 2023-12-22 (PDF) (JavaScript required).^{[dead link]}
^ Sobolev, Boris P. (2001). The rare earth trifluorides Introduction to materials science of multicomponent metal fluoride crystals. Arxius de les seccions. Barcelona: Institut d'Estudis Catalans. ISBN 978-84-7283-610-5.
^ Ans, Jean d'; Lax, Ellen (1998). Taschenbuch für Chemiker und Physiker (in German). Springer. ISBN 978-3-540-60035-0.

[auto-1] "Holmium Fluoride".

[2] Shaimuradov, I. B.; Reshetnikova, L. P.; Novoselova, A. V. Phase diagram of the potassium fluoride-holmium fluoride system. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1974. 10 (8). 1468-1471. ISSN 0002-337X.

[Janiak-3] Janiak, Christoph; Meyer, Hans-Jürgen; Gudat, Dietrich; Alsfasser, Ralf (2012-01-27). Riedel Moderne Anorganische Chemie (in German). Walter de Gruyter. ISBN 978-3-11-024901-9.

[Webelements-4] "Chemical reactions of Holmium". Webelements. Retrieved 2009-06-06.

[5] Holmium(III) fluoride at AlfaAesar, accessed on 2023-12-22 (PDF) (JavaScript required).^{[dead link]}

[6] Sobolev, Boris P. (2001). The rare earth trifluorides Introduction to materials science of multicomponent metal fluoride crystals. Arxius de les seccions. Barcelona: Institut d'Estudis Catalans. ISBN 978-84-7283-610-5.

[7] Ans, Jean d'; Lax, Ellen (1998). Taschenbuch für Chemiker und Physiker (in German). Springer. ISBN 978-3-540-60035-0.

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