The structure of Chromium Trichloride

CrCl₃ has a common structural arrangement shared by many halides of the transition metals with formula MX₃. It has a cubic close packed array of chloride ions with Cr(III) sitting in 1/3 of the octahedral sites and between adjacent layers of Cl's.

Highlight the ccp (face-centred) layers of Cl's (rotate for best view)
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Highlight a Cr site, CN=6
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This form exists below 240K, at room temperature a monoclinic form is found.