Eu2PCl is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent P(1) and four equivalent Cl(1) atoms to form EuP2Cl4 octahedra that share corners with six equivalent Eu(1)P2Cl4 octahedra, edges with four equivalent Eu(1)P2Cl4 octahedra, and edges with eight equivalent Eu(2)P4Cl2 octahedra. The corner-sharing octahedra are not tilted. In the second Eu site, Eu(2) is bonded to four equivalent P(1) and two equivalent Cl(1) atoms to form EuP4Cl2 octahedra that share corners with six equivalent Eu(2)P4Cl2 octahedra, edges with four equivalent Eu(2)P4Cl2 octahedra, and edges with eight equivalent Eu(1)P2Cl4 octahedra. The corner-sharing octahedra are not tilted. P(1) is bonded to two equivalent Eu(1) and four equivalent Eu(2) atoms to form PEu6 octahedra that share corners with six equivalent P(1)Eu6 octahedra, edges with four equivalent P(1)Eu6 octahedra, and edges with eight equivalent Cl(1)Eu6 octahedra. The corner-sharing octahedra are not tilted. Cl(1) is bonded to two equivalent Eu(2) and four equivalent Eu(1) atoms to form ClEu6 octahedra that share corners with six equivalent Cl(1)Eu6 octahedra, edges with four equivalent Cl(1)Eu6 octahedra, and edges with eight equivalent P(1)Eu6 octahedra. The corner-sharing octahedra are not tilted.
Eu2PCl is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent P(1) and four equivalent Cl(1) atoms to form EuP2Cl4 octahedra that share corners with six equivalent Eu(1)P2Cl4 octahedra, edges with four equivalent Eu(1)P2Cl4 octahedra, and edges with eight equivalent Eu(2)P4Cl2 octahedra. The corner-sharing octahedra are not tilted. Both Eu(1)-P(1) bond lengths are 2.96 Å. All Eu(1)-Cl(1) bond lengths are 2.99 Å. In the second Eu site, Eu(2) is bonded to four equivalent P(1) and two equivalent Cl(1) atoms to form EuP4Cl2 octahedra that share corners with six equivalent Eu(2)P4Cl2 octahedra, edges with four equivalent Eu(2)P4Cl2 octahedra, and edges with eight equivalent Eu(1)P2Cl4 octahedra. The corner-sharing octahedra are not tilted. All Eu(2)-P(1) bond lengths are 2.99 Å. Both Eu(2)-Cl(1) bond lengths are 2.96 Å. P(1) is bonded to two equivalent Eu(1) and four equivalent Eu(2) atoms to form PEu6 octahedra that share corners with six equivalent P(1)Eu6 octahedra, edges with four equivalent P(1)Eu6 octahedra, and edges with eight equivalent Cl(1)Eu6 octahedra. The corner-sharing octahedra are not tilted. Cl(1) is bonded to two equivalent Eu(2) and four equivalent Eu(1) atoms to form ClEu6 octahedra that share corners with six equivalent Cl(1)Eu6 octahedra, edges with four equivalent Cl(1)Eu6 octahedra, and edges with eight equivalent P(1)Eu6 octahedra. The corner-sharing octahedra are not tilted.