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Californium(III) oxide
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<h2 id="synthesis">Synthesis</h2> <p>The compound can be prepared by burning ionite in air, on which ions of trivalent californium are sorbed, at a temperature of 1400 °C. It can also be obtained by β-decay of berkelium(III) oxide. </p> <h2 id="physical-properties">Physical properties</h2> <p>Californium(III) oxide forms a yellow-green solid with a melting point of 1750 °C and exists in three modifications.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> The body-centered cubic modification forms a crystal lattice with a = 1083.9 ± 0.4 pm. The transition temperature between body-centered cubic and monoclinic structures is about 1400 °C.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a><a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> </p><p>It is insoluble in water.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Morss, Lester R.; Fuger, J.; Goffart, J.; Edelstein, N.; Shalimoff, G. V. (1 January 1987). "Enthalpy of formation and magnetic susceptibility of californium sesquioxide, Cf2O3". Journal of the Less Common Metals. 127: 251–257. doi:10.1016/0022-5088(87)90385-7. ISSN 0022-5088. Retrieved 10 April 2023. <a href="https://www.sciencedirect.com/science/article/abs/pii/0022508887903857" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0022508887903857</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 2826. ISBN 978-0-412-30120-9. Retrieved 10 April 2023. <a href="978-0-412-30120-9" target="_blank">978-0-412-30120-9</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Copeland, J. C.; Cunningham, B. B. (1 March 1969). "Crystallography of the compounds of californium—II crystal structure and lattice parameters of californium oxychloride and californium sesquioxide". Journal of Inorganic and Nuclear Chemistry. 31 (3): 733–740. doi:10.1016/0022-1902(69)80020-5. ISSN 0022-1902. Retrieved 10 April 2023. <a href="https://www.sciencedirect.com/science/article/abs/pii/0022190269800205" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0022190269800205</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Green, J. L.; Cunningham, B. B. (1 September 1967). "Crystallography of the compounds of californium. I. Crystal structure and lattice parameters of californium sesquioxide and californium trichloride". Inorganic and Nuclear Chemistry Letters. 3 (9): 343–349. doi:10.1016/0020-1650(67)80040-0. ISSN 0020-1650. Retrieved 10 April 2023. <a href="https://www.sciencedirect.com/science/article/abs/pii/0020165067800400" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0020165067800400</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Schweitzer, George K.; Pesterfield, Lester L. (14 January 2010). The Aqueous Chemistry of the Elements. Oxford University Press. p. 406. ISBN 978-0-19-539335-4. Retrieved 11 April 2023. <a href="978-0-19-539335-4" target="_blank">978-0-19-539335-4</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> </ol>