Ba8Eu(BN2)6 crystallizes in the cubic Pm-3m space group. Ba(1) is bonded to three equivalent N(1) and three equivalent N(2) atoms to form distorted BaN6 octahedra that share corners with six equivalent Ba(1)N6 octahedra, edges with six equivalent Ba(1)N6 octahedra, and  a faceface with one Eu(1)N6 octahedra. The corner-sharing octahedral tilt angles range from 21-31°. Eu(1) is bonded to six equivalent N(2) atoms to form EuN6 octahedra that share faces with eight equivalent Ba(1)N6 octahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded in a linear geometry to two equivalent N(2) atoms. In the second B site, B(2) is bonded in a linear geometry to two equivalent N(1) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted single-bond geometry to four equivalent Ba(1) and one B(2) atom. In the second N site, N(2) is bonded in a distorted single-bond geometry to four equivalent Ba(1), one Eu(1), and one B(1) atom.
Ba8Eu(BN2)6 crystallizes in the cubic Pm-3m space group. Ba(1) is bonded to three equivalent N(1) and three equivalent N(2) atoms to form distorted BaN6 octahedra that share corners with six equivalent Ba(1)N6 octahedra, edges with six equivalent Ba(1)N6 octahedra, and  a faceface with one Eu(1)N6 octahedra. The corner-sharing octahedral tilt angles range from 21-31°. All Ba(1)-N(1) bond lengths are 2.81 Å. All Ba(1)-N(2) bond lengths are 3.02 Å. Eu(1) is bonded to six equivalent N(2) atoms to form EuN6 octahedra that share faces with eight equivalent Ba(1)N6 octahedra. All Eu(1)-N(2) bond lengths are 2.65 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a linear geometry to two equivalent N(2) atoms. Both B(1)-N(2) bond lengths are 1.36 Å. In the second B site, B(2) is bonded in a linear geometry to two equivalent N(1) atoms. Both B(2)-N(1) bond lengths are 1.35 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted single-bond geometry to four equivalent Ba(1) and one B(2) atom. In the second N site, N(2) is bonded in a distorted single-bond geometry to four equivalent Ba(1), one Eu(1), and one B(1) atom.