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Radium fluoride

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Radium fluoride
Identifiers
Ra²⁺ F⁻
CAS Number	20610-49-5^Y
3D model (JSmol)	Interactive image
CompTox Dashboard(EPA)	DTXSID201314189
InChI InChI=1S/2FH.Ra/h2*1H;/q;;+2/p-2 Key: FSYYCDYDQQAUCW-UHFFFAOYSA-L
SMILES F[Ra]F
Properties
Chemical formula	RaF₂
Molar mass	263.8214 g/mol^[1]
Appearance	White cubic crystals^[1]
Density	6.7 g/cm³^[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Highlyradioactive and toxic
GHS labelling:
Pictograms
Hazard statements	H350
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

Radium fluoride is aninorganic compound with achemical formula ofRaF₂. This salt, like all radium compounds, is highlyradioactive. It can becoprecipitated withlanthanide fluorides.^[2] Radium fluoride has the same crystal form ascalcium fluoride (fluorite).^{[citation needed]} However, calculations suggest that radium fluoride vapor consists of RaF₂ molecules, with a bond angle of 118°, due to substantial covalent interaction within the molecule.^[3]

Radium fluoride can be produced by the reaction ofradium metal andhydrogen fluoride gas:^{[citation needed]}

Ra + 2 HF → RaF₂ +H₂

^^a ^b ^c"Radium fluoride | 20610-49-5".
^US 1655184, Hahn, Otto, "Radium preparation and process of making same", published 1928-01-03
^Lee, Edmond P. F.; Soldán, Pavel; Wright, Timothy G. (2001-11-01)."The Heaviest Group 2 Difluoride, RaF 2 : Geometry and Ionization Energy".Inorganic Chemistry.40 (23):5979–5984.doi:10.1021/ic010538l.ISSN 0020-1669.PMID 11681914.