Einsteinium(III) oxide

Einsteinium(III) oxide

__ Es3+     __ O2−
Names
IUPAC names
Einsteinium sesquioxide
Dieinsteinium trioxide
Einsteinium(III) oxide
Identifiers
ChemSpider
Properties
Es2O3
Molar mass 554 g/mol (253Es)
Appearance colourless solid
Structure
Hexagonal
Ia3
a = 370 pm, c = 600 pm
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

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 pm; this allows the ionic radius of the Es3+ ion to be calculated as 92.8 pm. The other two forms are monoclinic and hexagonal: the hexagonal form has the lanthanum(III) oxide structure.

Einsteinium(III) oxide can be obtained by annealing einsteinium(III) nitrate in sub-microgram quantities.


This page was last updated at 2024-03-17 02:41 UTC. Update now. View original page.

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