Radium fluoride

Radium fluoride

Ra 2+0   F −
Identifiers
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	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

References

1. "Radium fluoride | 20610-49-5".
2. US 1655184, Hahn, Otto,"Radium preparation and process of making same",published 1928-01-03 
3. 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.

See also

• Monica Vasiliu, J. Grant Hill, Kirk A. Peterson, David A. Dixon (2018-01-11). "Structures and Heats of Formation of Simple Alkaline Earth Metal Compounds II: Fluorides, Chlorides, Oxides, and Hydroxides for Ba, Sr, and Ra" (PDF). The Journal of Physical Chemistry A. 122 (1): 316–327. Bibcode:2018JPCA..122..316V. doi:10.1021/acs.jpca.7b09056. ISSN   1089-5639. OSTI   1539153. PMID   29240428.