Californium(II) iodide explained

Californium(II) iodide is a binary inorganic compound of californium and iodine with the formula .^[1] __TOC__

Synthesis

It can be produced by reducing californium triiodide with hydrogen in a quartz thin tube at 570 °C:^[2]

Physical properties

The compound forms a dark purple solid. At slightly higher temperatures, it melts and reacts with the silica in the thin tube, producing CfOI.

Californium diiodide has two crystal structures, one is -type crystal structure, stable at room temperature, with lattice parameters a = 743.4 ± 1.1 pm and α = 35.83 ± 0.07°; the other is metastable, of -type with lattice parameters a = 455.7 ± 0.4 pm and c = 699.2 ± 0.6 pm.^[3] Californium diiodide has an absorption band in the wavelength range from 300 to 1100 nm, which proves the existence of Cf(II).^[4]

Notes and References

1. Web site: WebElements Periodic Table » Californium » californium dioxide . webelements.com . 11 April 2023.
2. Book: Stuart . Sam . XXIVth International Congress of Pure and Applied Chemistry: Plenary and Main Section Lectures Presented at Hamburg, Federal Republic of Germany, 2–8 September 1973 . 11 September 2013 . . 978-1-4832-7868-1 . 117 . 11 April 2023 . en.
3. Book: Macintyre . Jane E. . Dictionary of Inorganic Compounds . 23 July 1992 . . 978-0-412-30120-9 . 2826 . 11 April 2023 . en.
4. Wild . J. F. . Hulet . E. K. . Lougheed . R. W. . Hayes . W. N. . Peterson . J. R. . Fellows . R. L. . Young . J. P. . Studies of californium(II) and (III) iodides . . 1 January 1978 . 40 . 5 . 811–817 . 10.1016/0022-1902(78)80157-2 . 11 April 2023 . en . 0022-1902.