Materials Data on UNCl by Materials Project
UNCl is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. U4+ is bonded in a 4-coordinate geometry to four equivalent N3- and five equivalent Cl1- atoms. All U–N bond lengths are 2.25 Å. There are four shorter (3.12 Å) and one longer (3.33 Å) U–Cl bond lengths. N3- is bonded to four equivalent U4+ atoms to form a mixture of edge and corner-sharing NU4 tetrahedra. Cl1- is bonded in a 5-coordinate geometry to five equivalent U4+ atoms.
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