Radium fluoride

Radium fluoride
	; Ra2+ 0 F−
Identifiers
CAS Number	20610-49-5 ;
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
Appearance	White cubic crystals
Density	6.7 g/cm3
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Highly radioactive and toxic
	GHS labelling:
Pictograms
Hazard statements	H350
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Radium fluoride is an inorganic compound with a chemical formula of RaF₂. This salt, like all radium compounds, is highly radioactive. It can be coprecipitated with lanthanide fluorides.^[2] Radium fluoride has the same crystal form as calcium 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]

Production

Radium fluoride can be produced by the reaction of radium metal and hydrogen 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.