EuP3 crystallizes in the monoclinic C2/m space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 7-coordinate geometry to one P(1), one P(2), two equivalent P(4), and four equivalent P(3) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one P(1), four equivalent P(3), and four equivalent P(4) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 5-coordinate geometry to one Eu(1), one Eu(2), one P(2), and two equivalent P(3) atoms. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one Eu(1), one P(1), and two equivalent P(4) atoms. In the third P site, P(3) is bonded in a 6-coordinate geometry to two equivalent Eu(1), two equivalent Eu(2), one P(1), and one P(3) atom. In the fourth P site, P(4) is bonded in a 5-coordinate geometry to one Eu(1), two equivalent Eu(2), one P(2), and one P(4) atom.
EuP3 crystallizes in the monoclinic C2/m space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 7-coordinate geometry to one P(1), one P(2), two equivalent P(4), and four equivalent P(3) atoms. The Eu(1)-P(1) bond length is 3.32 Å. The Eu(1)-P(2) bond length is 3.16 Å. Both Eu(1)-P(4) bond lengths are 2.99 Å. There are two shorter (3.09 Å) and two longer (3.17 Å) Eu(1)-P(3) bond lengths. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one P(1), four equivalent P(3), and four equivalent P(4) atoms. The Eu(2)-P(1) bond length is 3.06 Å. There are two shorter (2.98 Å) and two longer (3.44 Å) Eu(2)-P(3) bond lengths. There are two shorter (3.10 Å) and two longer (3.21 Å) Eu(2)-P(4) bond lengths. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 5-coordinate geometry to one Eu(1), one Eu(2), one P(2), and two equivalent P(3) atoms. The P(1)-P(2) bond length is 2.24 Å. Both P(1)-P(3) bond lengths are 2.18 Å. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one Eu(1), one P(1), and two equivalent P(4) atoms. Both P(2)-P(4) bond lengths are 2.20 Å. In the third P site, P(3) is bonded in a 6-coordinate geometry to two equivalent Eu(1), two equivalent Eu(2), one P(1), and one P(3) atom. The P(3)-P(3) bond length is 2.19 Å. In the fourth P site, P(4) is bonded in a 5-coordinate geometry to one Eu(1), two equivalent Eu(2), one P(2), and one P(4) atom. The P(4)-P(4) bond length is 2.23 Å.