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SrN2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Sr2+ is bonded in a distorted q4 geometry to ten equivalent N1- atoms. There are two shorter (2.52 Å) and eight longer (2.80 Å) Sr–N bond lengths. N1- is bonded in a 2-coordinate geometry to five equivalent Sr2+ and one N1- atom. The N–N bond length is 1.25 Å.
SrN2 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Sr2+ is bonded in a distorted hexagonal planar geometry to six equivalent N1- atoms. There are four shorter (2.59 Å) and two longer (2.66 Å) Sr–N bond lengths. N1- is bonded in a distorted trigonal planar geometry to three equivalent Sr2+ atoms.