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 their standard state (at 25 °C [77 °F], 100 kPa). |
Californium(II) iodide is a binary inorganic compound of californium and iodine with the formula CfI
2. [1]
It can be produced by reducing californium 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 the silica in the thin tube, producing CfOI.[ citation needed ]
Californium diiodide has two crystal structures, one is CdCl
2-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 CdI
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]