Re3P4 crystallizes in the monoclinic C2/m space group. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 6-coordinate geometry to three equivalent P(1) and three equivalent P(2) atoms. In the second Re site, Re(2) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form edge-sharing ReP6 octahedra. There are two inequivalent P sites. In the first P site, P(2) is bonded in a 5-coordinate geometry to two equivalent Re(2) and three equivalent Re(1) atoms. In the second P site, P(1) is bonded in a 5-coordinate geometry to one Re(2), three equivalent Re(1), and one P(1) atom.
Re3P4 crystallizes in the monoclinic C2/m space group. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 6-coordinate geometry to three equivalent P(1) and three equivalent P(2) atoms. There are two shorter (2.38 Å) and one longer (2.54 Å) Re(1)-P(1) bond length. There is one shorter (2.42 Å) and two longer (2.49 Å) Re(1)-P(2) bond lengths. In the second Re site, Re(2) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form edge-sharing ReP6 octahedra. Both Re(2)-P(1) bond lengths are 2.41 Å. All Re(2)-P(2) bond lengths are 2.41 Å. There are two inequivalent P sites. In the first P site, P(2) is bonded in a 5-coordinate geometry to two equivalent Re(2) and three equivalent Re(1) atoms. In the second P site, P(1) is bonded in a 5-coordinate geometry to one Re(2), three equivalent Re(1), and one P(1) atom. The P(1)-P(1) bond length is 2.51 Å.