Tl 2 O adopts the anti-cadmium iodide structure in the solid state.
2.
Cadmium iodide's crystal structure is the prototype on which the crystal structures many other compounds can be considered to be based.
3.
The hydroxide ion displays cylindrical symmetry in hydroxides of divalent metals Ca, Cd, Mn, Fe, and Co . For example, magnesium hydroxide Mg ( OH ) 2 ( brucite ) crystallizes with the cadmium iodide layer structure, with a kind of close-packing of magnesium and hydroxide ions.
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