ErV2Fe10N crystallizes in the orthorhombic Immm space group. Er(1) is bonded in a linear geometry to two equivalent V(1), two equivalent Fe(4), eight equivalent Fe(3), and two equivalent N(1) atoms. V(1) is bonded in a 14-coordinate geometry to one Er(1), one V(1), two equivalent Fe(1), two equivalent Fe(2), four equivalent Fe(3), and four equivalent Fe(4) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a single-bond geometry to two equivalent V(1), two equivalent Fe(4), four equivalent Fe(3), and one N(1) atom. In the second Fe site, Fe(2) is bonded in a single-bond geometry to two equivalent V(1), two equivalent Fe(4), four equivalent Fe(3), and one N(1) atom. In the third Fe site, Fe(3) is bonded to two equivalent Er(1), two equivalent V(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(3), and two equivalent Fe(4) atoms to form distorted FeEr2V2Fe8 cuboctahedra that share corners with ten equivalent Fe(3)Er2V2Fe8 cuboctahedra, corners with two equivalent N(1)Er2Fe4 octahedra, edges with four equivalent Fe(3)Er2V2Fe8 cuboctahedra, faces with six equivalent Fe(3)Er2V2Fe8 cuboctahedra, and faces with two equivalent N(1)Er2Fe4 octahedra. The corner-sharing octahedral tilt angles are 69°. In the fourth Fe site, Fe(4) is bonded in a 14-coordinate geometry to one Er(1), four equivalent V(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(2), and four equivalent Fe(3) atoms. N(1) is bonded to two equivalent Er(1), two equivalent Fe(1), and two equivalent Fe(2) atoms to form NEr2Fe4 octahedra that share corners with eight equivalent Fe(3)Er2V2Fe8 cuboctahedra, corners with two equivalent N(1)Er2Fe4 octahedra, and faces with eight equivalent Fe(3)Er2V2Fe8 cuboctahedra. The corner-sharing octahedra are not tilted.
ErV2Fe10N crystallizes in the orthorhombic Immm space group. Er(1) is bonded in a linear geometry to two equivalent V(1), two equivalent Fe(4), eight equivalent Fe(3), and two equivalent N(1) atoms. Both Er(1)-V(1) bond lengths are 3.06 Å. Both Er(1)-Fe(4) bond lengths are 3.08 Å. All Er(1)-Fe(3) bond lengths are 3.25 Å. Both Er(1)-N(1) bond lengths are 2.36 Å. V(1) is bonded in a 14-coordinate geometry to one Er(1), one V(1), two equivalent Fe(1), two equivalent Fe(2), four equivalent Fe(3), and four equivalent Fe(4) atoms. The V(1)-V(1) bond length is 2.44 Å. Both V(1)-Fe(1) bond lengths are 2.66 Å. Both V(1)-Fe(2) bond lengths are 2.62 Å. All V(1)-Fe(3) bond lengths are 2.61 Å. All V(1)-Fe(4) bond lengths are 2.91 Å. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a single-bond geometry to two equivalent V(1), two equivalent Fe(4), four equivalent Fe(3), and one N(1) atom. Both Fe(1)-Fe(4) bond lengths are 2.62 Å. All Fe(1)-Fe(3) bond lengths are 2.45 Å. The Fe(1)-N(1) bond length is 1.93 Å. In the second Fe site, Fe(2) is bonded in a single-bond geometry to two equivalent V(1), two equivalent Fe(4), four equivalent Fe(3), and one N(1) atom. Both Fe(2)-Fe(4) bond lengths are 2.66 Å. All Fe(2)-Fe(3) bond lengths are 2.46 Å. The Fe(2)-N(1) bond length is 1.91 Å. In the third Fe site, Fe(3) is bonded to two equivalent Er(1), two equivalent V(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(3), and two equivalent Fe(4) atoms to form distorted FeEr2V2Fe8 cuboctahedra that share corners with ten equivalent Fe(3)Er2V2Fe8 cuboctahedra, corners with two equivalent N(1)Er2Fe4 octahedra, edges with four equivalent Fe(3)Er2V2Fe8 cuboctahedra, faces with six equivalent Fe(3)Er2V2Fe8 cuboctahedra, and faces with two equivalent N(1)Er2Fe4 octahedra. The corner-sharing octahedral tilt angles are 69°. Both Fe(3)-Fe(3) bond lengths are 2.36 Å. Both Fe(3)-Fe(4) bond lengths are 2.62 Å. In the fourth Fe site, Fe(4) is bonded in a 14-coordinate geometry to one Er(1), four equivalent V(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(2), and four equivalent Fe(3) atoms. The Fe(4)-Fe(4) bond length is 2.41 Å. N(1) is bonded to two equivalent Er(1), two equivalent Fe(1), and two equivalent Fe(2) atoms to form NEr2Fe4 octahedra that share corners with eight equivalent Fe(3)Er2V2Fe8 cuboctahedra, corners with two equivalent N(1)Er2Fe4 octahedra, and faces with eight equivalent Fe(3)Er2V2Fe8 cuboctahedra. The corner-sharing octahedra are not tilted.