CuGe2P3 is Enargite-like structured and crystallizes in the trigonal P3m1 space group. Cu(1) is bonded to one P(1) and three equivalent P(3) atoms to form CuP4 trigonal pyramids that share corners with three equivalent Ge(1)P4 tetrahedra, corners with three equivalent Ge(2)P4 tetrahedra, and corners with six equivalent Cu(1)P4 trigonal pyramids. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one P(2) and three equivalent P(1) atoms to form GeP4 tetrahedra that share corners with three equivalent Ge(2)P4 tetrahedra, corners with six equivalent Ge(1)P4 tetrahedra, and corners with three equivalent Cu(1)P4 trigonal pyramids. In the second Ge site, Ge(2) is bonded to one P(3) and three equivalent P(2) atoms to form GeP4 tetrahedra that share corners with three equivalent Ge(1)P4 tetrahedra, corners with six equivalent Ge(2)P4 tetrahedra, and corners with three equivalent Cu(1)P4 trigonal pyramids. There are three inequivalent P sites. In the first P site, P(1) is bonded to one Cu(1) and three equivalent Ge(1) atoms to form PCuGe3 tetrahedra that share corners with three equivalent P(2)Ge4 tetrahedra, corners with six equivalent P(1)CuGe3 tetrahedra, and corners with three equivalent P(3)Cu3Ge trigonal pyramids. In the second P site, P(2) is bonded to one Ge(1) and three equivalent Ge(2) atoms to form PGe4 tetrahedra that share corners with three equivalent P(1)CuGe3 tetrahedra, corners with six equivalent P(2)Ge4 tetrahedra, and corners with three equivalent P(3)Cu3Ge trigonal pyramids. In the third P site, P(3) is bonded to three equivalent Cu(1) and one Ge(2) atom to form PCu3Ge trigonal pyramids that share corners with three equivalent P(1)CuGe3 tetrahedra, corners with three equivalent P(2)Ge4 tetrahedra, and corners with six equivalent P(3)Cu3Ge trigonal pyramids.
CuGe2P3 is Enargite-like structured and crystallizes in the trigonal P3m1 space group. Cu(1) is bonded to one P(1) and three equivalent P(3) atoms to form CuP4 trigonal pyramids that share corners with three equivalent Ge(1)P4 tetrahedra, corners with three equivalent Ge(2)P4 tetrahedra, and corners with six equivalent Cu(1)P4 trigonal pyramids. The Cu(1)-P(1) bond length is 2.30 Å. All Cu(1)-P(3) bond lengths are 2.27 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one P(2) and three equivalent P(1) atoms to form GeP4 tetrahedra that share corners with three equivalent Ge(2)P4 tetrahedra, corners with six equivalent Ge(1)P4 tetrahedra, and corners with three equivalent Cu(1)P4 trigonal pyramids. The Ge(1)-P(2) bond length is 2.42 Å. All Ge(1)-P(1) bond lengths are 2.42 Å. In the second Ge site, Ge(2) is bonded to one P(3) and three equivalent P(2) atoms to form GeP4 tetrahedra that share corners with three equivalent Ge(1)P4 tetrahedra, corners with six equivalent Ge(2)P4 tetrahedra, and corners with three equivalent Cu(1)P4 trigonal pyramids. The Ge(2)-P(3) bond length is 2.27 Å. All Ge(2)-P(2) bond lengths are 2.44 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one Cu(1) and three equivalent Ge(1) atoms to form PCuGe3 tetrahedra that share corners with three equivalent P(2)Ge4 tetrahedra, corners with six equivalent P(1)CuGe3 tetrahedra, and corners with three equivalent P(3)Cu3Ge trigonal pyramids. In the second P site, P(2) is bonded to one Ge(1) and three equivalent Ge(2) atoms to form PGe4 tetrahedra that share corners with three equivalent P(1)CuGe3 tetrahedra, corners with six equivalent P(2)Ge4 tetrahedra, and corners with three equivalent P(3)Cu3Ge trigonal pyramids. In the third P site, P(3) is bonded to three equivalent Cu(1) and one Ge(2) atom to form PCu3Ge trigonal pyramids that share corners with three equivalent P(1)CuGe3 tetrahedra, corners with three equivalent P(2)Ge4 tetrahedra, and corners with six equivalent P(3)Cu3Ge trigonal pyramids.