Einsteinium trifluoride

Einsteinium fluoride is a binary inorganic chemical compound of einsteinium and fluorine with the chemical formula EsF₃.^[1]

Einsteinium fluoride

Names
Other names Einsteinium(III) fluoride, einsteinium trifluoride
Identifiers
CAS Number	99644-27-6
3D model (JSmol)	Interactive image
ChemSpider	64887117
InChI InChI=1S/Es.3FH/h;3*1H/q+3;;;/p-3 Key: NYNVZWGCTJTDET-UHFFFAOYSA-K
SMILES [Es+3].[F-].[F-].[F-]
Properties
Chemical formula	EsF3
Molar mass	309 g·mol−1
Appearance	crystals
Solubility in water	insoluble
Related compounds
Related compounds	Californium(III) fluoride Berkelium(III) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Einsteinium fluoride can be precipitated from einsteinium(III) chloride solutions upon reaction with fluoride ions. An alternative preparation procedure is to expose einsteinium(III) oxide to chlorine trifluoride (ClF₃) or F₂ gas at a pressure of 1–2 atmospheres and a temperature between 300 and 400 °C. The EsF₃ crystal structure is hexagonal, as in californium(III) fluoride (CfF₃) where the Es³⁺ ions are 8-fold coordinated by fluorine ions in a bicapped trigonal prism arrangement.^[2][3][4]

Physical properties

The compound forms crystals and is insoluble in water.^[5]

Chemical properties

The compound is reduced by metallic lithium:^[6][7]

EsF₃ + 3Li → Es + 3 LiF