Sr3(BiN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one N(2) and four equivalent N(1) atoms to form a mixture of corner and edge-sharing SrN5 square pyramids. In the second Sr site, Sr(2) is bonded in a distorted bent 120 degrees geometry to two equivalent N(1) and two equivalent N(2) atoms. Bi(1) is bonded in a 3-coordinate geometry to one N(1) and two equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Sr(2), four equivalent Sr(1), and one Bi(1) atom. In the second N site, N(2) is bonded to one Sr(1), one Sr(2), and two equivalent Bi(1) atoms to form corner-sharing NSr2Bi2 trigonal pyramids.
Sr3(BiN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one N(2) and four equivalent N(1) atoms to form a mixture of corner and edge-sharing SrN5 square pyramids. The Sr(1)-N(2) bond length is 2.57 Å. There are a spread of Sr(1)-N(1) bond distances ranging from 2.57-2.88 Å. In the second Sr site, Sr(2) is bonded in a distorted bent 120 degrees geometry to two equivalent N(1) and two equivalent N(2) atoms. Both Sr(2)-N(1) bond lengths are 3.27 Å. Both Sr(2)-N(2) bond lengths are 2.43 Å. Bi(1) is bonded in a 3-coordinate geometry to one N(1) and two equivalent N(2) atoms. The Bi(1)-N(1) bond length is 2.20 Å. There is one shorter (2.24 Å) and one longer (2.26 Å) Bi(1)-N(2) bond length. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Sr(2), four equivalent Sr(1), and one Bi(1) atom. In the second N site, N(2) is bonded to one Sr(1), one Sr(2), and two equivalent Bi(1) atoms to form corner-sharing NSr2Bi2 trigonal pyramids.