K4BeP2 crystallizes in the trigonal R-3m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to three equivalent Be(1) and three equivalent P(1) atoms. In the second K site, K(2) is bonded to four equivalent P(1) atoms to form a mixture of corner and edge-sharing KP4 tetrahedra. Be(1) is bonded in a linear geometry to six equivalent K(1) and two equivalent P(1) atoms. P(1) is bonded in a distorted single-bond geometry to three equivalent K(1), four equivalent K(2), and one Be(1) atom.
K4BeP2 crystallizes in the trigonal R-3m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to three equivalent Be(1) and three equivalent P(1) atoms. All K(1)-Be(1) bond lengths are 3.40 Å. All K(1)-P(1) bond lengths are 3.34 Å. In the second K site, K(2) is bonded to four equivalent P(1) atoms to form a mixture of corner and edge-sharing KP4 tetrahedra. There is one shorter (3.26 Å) and three longer (3.42 Å) K(2)-P(1) bond lengths. Be(1) is bonded in a linear geometry to six equivalent K(1) and two equivalent P(1) atoms. Both Be(1)-P(1) bond lengths are 1.99 Å. P(1) is bonded in a distorted single-bond geometry to three equivalent K(1), four equivalent K(2), and one Be(1) atom.