Eu5Bi3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to six equivalent Bi(1) atoms. In the second Eu site, Eu(2) is bonded in a 5-coordinate geometry to five equivalent Bi(1) atoms. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1) and five equivalent Eu(2) atoms.
Eu5Bi3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to six equivalent Bi(1) atoms. All Eu(1)-Bi(1) bond lengths are 3.47 Å. In the second Eu site, Eu(2) is bonded in a 5-coordinate geometry to five equivalent Bi(1) atoms. There are a spread of Eu(2)-Bi(1) bond distances ranging from 3.27-3.83 Å. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1) and five equivalent Eu(2) atoms.