Editing Einsteinium (section)

===Oxides===
Einsteinium(III) oxide (Es{{sub|2}}O{{sub|3}}) was obtained by burning einsteinium(III) nitrate. It forms colorless cubic crystals, which were first characterized from microgram samples sized about 30 nanometers.<ref name="g1268">[[#Greenwood|Greenwood]], p. 1268</ref><ref name="ES2O3">{{cite journal|last1=Haire|first1=R. G.|last2=Baybarz|first2=R. D.|title=Identification and analysis of einsteinium sesquioxide by electron diffraction|journal=Journal of Inorganic and Nuclear Chemistry|volume=35|pages=489–496|date=1973|doi=10.1016/0022-1902(73)80561-5|issue=2}}</ref> Two other phases, [[Monoclinic crystal system|monoclinic]] and hexagonal, are known for this oxide. The formation of a certain Es{{sub|2}}O{{sub|3}} phase depends on the preparation technique and sample history, and there is no clear phase diagram. Interconversions between the three phases can occur spontaneously, as a result of self-irradiation or self-heating.<ref name="h1598">[[#Haire|Haire]], p. 1598</ref> The hexagonal phase is isotypic with [[lanthanum oxide]] where the Es{{sup|3+}} ion is surrounded by a 6-coordinated group of O{{sup|2−}} ions.<ref name="ox1">{{cite book|title=Handbook on the Physics and Chemistry of Rare Earths|volume=18|chapter=Lanthanides and Actinides Chemistry|editor=K.A. Gscheidner, Jr. |display-editors=etal|location=North-Holland, New York|date=1994|pages=414–505|isbn=978-0-444-81724-2|author=Haire, R. G.|author2=Eyring, L.|name-list-style=amp}}</ref><ref name="h1595" />