Rb2NiP2 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to two equivalent Ni(1) and six equivalent P(1) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to six equivalent P(1) atoms. Ni(1) is bonded in a 4-coordinate geometry to two equivalent Rb(1) and four equivalent P(1) atoms. P(1) is bonded in a 9-coordinate geometry to three equivalent Rb(1), three equivalent Rb(2), two equivalent Ni(1), and one P(1) atom.
Rb2NiP2 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to two equivalent Ni(1) and six equivalent P(1) atoms. Both Rb(1)-Ni(1) bond lengths are 3.31 Å. There are four shorter (3.48 Å) and two longer (3.52 Å) Rb(1)-P(1) bond lengths. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to six equivalent P(1) atoms. There are two shorter (3.41 Å) and four longer (3.65 Å) Rb(2)-P(1) bond lengths. Ni(1) is bonded in a 4-coordinate geometry to two equivalent Rb(1) and four equivalent P(1) atoms. All Ni(1)-P(1) bond lengths are 2.24 Å. P(1) is bonded in a 9-coordinate geometry to three equivalent Rb(1), three equivalent Rb(2), two equivalent Ni(1), and one P(1) atom. The P(1)-P(1) bond length is 2.17 Å.