| Names | |
|---|---|
| Other names Californium diiodide | |
| Identifiers | |
3D model (JSmol) | |
| |
| |
| Properties | |
| CfI2 | |
| Molar mass | 505 g·mol−1 |
| Appearance | dark purple solid |
| Density | g/cm3 |
| insoluble | |
| Structure | |
| cubic | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Californium(II) iodide is a binaryinorganic compound ofcalifornium andiodine with the formulaCfI
2.[1]
It can be produced by reducingcalifornium triiodide with hydrogen in a quartz thin tube at 570 °C:[2]
The compound forms a dark purple solid. At slightly higher temperatures, it melts and reacts with thesilica in the thin tube, producing CfOI.[citation needed]
Californium diiodide has two crystal structures, one isCdCl
2-type crystal structure, stable at room temperature, withlattice parameters a = 743.4 ± 1.1 pm and α = 35.83 ± 0.07°; the other is metastable, ofCdI
2-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]
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