Einsteinium Trifluoride
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Einsteinium fluoride is a binary inorganic chemical compound of einsteinium and
fluorine Fluorine is a chemical element with the symbol F and atomic number 9. It is the lightest halogen and exists at standard conditions as a highly toxic, pale yellow diatomic gas. As the most electronegative reactive element, it is extremely reacti ...
with the chemical formula .


Synthesis

Einsteinium fluoride can be precipitated from
einsteinium(III) chloride Einsteinium(III) chloride is a chloride of einsteinium. Preparation Einsteinium(III) chloride is created by reacting einsteinium metal with dry hydrogen chloride gas for 20 minutes at 500 °C which crystallized around 425 °C. :2 Es ...
solutions upon reaction with
fluoride Fluoride (). According to this source, is a possible pronunciation in British English. is an inorganic, monatomic anion of fluorine, with the chemical formula (also written ), whose salts are typically white or colorless. Fluoride salts typ ...
ions. An alternative preparation procedure is to expose
einsteinium(III) oxide Einsteinium(III) oxide is an oxide of the synthetic actinide einsteinium which has the molecular formula Es2O3. It is a colourless solid. Three modifications are known. The body-centered cubic form has lattice parameter ''a'' = 1076.6 ± 0.6& ...
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.
Greenwood Green wood is unseasoned wood. Greenwood or Green wood may also refer to: People * Greenwood (surname) Settlements Australia * Greenwood, Queensland, a locality in the Toowoomba Region * Greenwood, Western Australia, a suburb of Perth C ...
, p. 1270


Physical properties

The compound forms crystals and is insoluble in water.


Chemical properties

The compound is reduced by metallic lithium: ::


References

{{Actinide halides Einsteinium compounds Fluorides Actinide halides