Californium(II) iodide is a binary

inorganic compound In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemi ...

californium Californium is a radioactive chemical element with the symbol Cf and atomic number 98. The element was first synthesized in 1950 at Lawrence Berkeley National Laboratory (then the University of California Radiation Laboratory), by bombarding ...

and

iodine Iodine is a chemical element with the Symbol (chemistry), symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a semi-lustrous, non-metallic solid at standard conditions that melts to form a deep violet liquid at , ...

with the formula . __TOC__

Synthesis

It can be produced by reducing

californium triiodide Californium(III) iodide is a binary inorganic compound of californium and iodine with the formula . Synthesis Californium triiodide can be prepared in microgram quantities under high vacuum. It can be prepared at 500 °C from californium(III) hyd ...

with hydrogen in a quartz thin tube at 570 °C: ::

Physical properties

The compound forms a dark purple solid. At slightly higher temperatures, it melts and reacts with the

silica Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula , most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is o ...

in the thin tube, producing CfOI. Californium diiodide has two crystal structures, one is -type crystal structure, stable at room temperature, with

lattice parameter A lattice constant or lattice parameter is one of the physical dimensions and angles that determine the geometry of the unit cells in a crystal lattice, and is proportional to the distance between atoms in the crystal. A simple cubic crystal has o ...

s 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. Californium diiodide has an absorption band in the wavelength range from 300 to 1100 nm, which proves the existence of Cf(II).

References

Californium compounds Iodides Actinide halides {{inorganic-compound-stub