Sr5(FeN2)2 is Pb(Zr_(1-x)Ti_x)O3-like structured and crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted square co-planar geometry to four equivalent N(1) atoms. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. Fe(1) is bonded in a linear geometry to two equivalent N(1) atoms. N(1) is bonded to one Sr(1), four equivalent Sr(2), and one Fe(1) atom to form a mixture of distorted corner and edge-sharing NSr5Fe octahedra. The corner-sharing octahedral tilt angles range from 7-23°.
Sr5(FeN2)2 is Pb(Zr_(1-x)Ti_x)O3-like structured and crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted square co-planar geometry to four equivalent N(1) atoms. All Sr(1)-N(1) bond lengths are 2.91 Å. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. There are a spread of Sr(2)-N(1) bond distances ranging from 2.62-2.74 Å. Fe(1) is bonded in a linear geometry to two equivalent N(1) atoms. Both Fe(1)-N(1) bond lengths are 1.74 Å. N(1) is bonded to one Sr(1), four equivalent Sr(2), and one Fe(1) atom to form a mixture of distorted corner and edge-sharing NSr5Fe octahedra. The corner-sharing octahedral tilt angles range from 7-23°.