Eu2Pd6B crystallizes in the tetragonal P4/mmm space group. Eu(1) is bonded to four equivalent Pd(1), four equivalent Pd(2), and four equivalent Pd(3) atoms to form EuPd12 cuboctahedra that share corners with twelve equivalent Eu(1)Pd12 cuboctahedra, faces with six equivalent Eu(1)Pd12 cuboctahedra, and faces with four equivalent B(1)Pd6 octahedra. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded to four equivalent Eu(1) and two equivalent B(1) atoms to form a mixture of distorted face, corner, and edge-sharing PdEu4B2 octahedra. The corner-sharing octahedra are not tilted. In the second Pd site, Pd(2) is bonded in a distorted square co-planar geometry to four equivalent Eu(1) atoms. In the third Pd site, Pd(3) is bonded in a 1-coordinate geometry to four equivalent Eu(1) and one B(1) atom. B(1) is bonded to two equivalent Pd(3) and four equivalent Pd(1) atoms to form BPd6 octahedra that share corners with four equivalent B(1)Pd6 octahedra and faces with eight equivalent Eu(1)Pd12 cuboctahedra. The corner-sharing octahedra are not tilted.
Eu2Pd6B crystallizes in the tetragonal P4/mmm space group. Eu(1) is bonded to four equivalent Pd(1), four equivalent Pd(2), and four equivalent Pd(3) atoms to form EuPd12 cuboctahedra that share corners with twelve equivalent Eu(1)Pd12 cuboctahedra, faces with six equivalent Eu(1)Pd12 cuboctahedra, and faces with four equivalent B(1)Pd6 octahedra. All Eu(1)-Pd(1) bond lengths are 3.03 Å. All Eu(1)-Pd(2) bond lengths are 2.92 Å. All Eu(1)-Pd(3) bond lengths are 3.04 Å. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded to four equivalent Eu(1) and two equivalent B(1) atoms to form a mixture of distorted face, corner, and edge-sharing PdEu4B2 octahedra. The corner-sharing octahedra are not tilted. Both Pd(1)-B(1) bond lengths are 2.15 Å. In the second Pd site, Pd(2) is bonded in a distorted square co-planar geometry to four equivalent Eu(1) atoms. In the third Pd site, Pd(3) is bonded in a 1-coordinate geometry to four equivalent Eu(1) and one B(1) atom. The Pd(3)-B(1) bond length is 2.12 Å. B(1) is bonded to two equivalent Pd(3) and four equivalent Pd(1) atoms to form BPd6 octahedra that share corners with four equivalent B(1)Pd6 octahedra and faces with eight equivalent Eu(1)Pd12 cuboctahedra. The corner-sharing octahedra are not tilted.