CrZnP2O7 crystallizes in the triclinic P-1 space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(10), one O(14), one O(2), one O(4), and one O(6) atom to form distorted CrO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and edges with two equivalent Zn(2)O6 octahedra. In the second Cr site, Cr(2) is bonded to one O(1), one O(13), one O(3), one O(5), and one O(9) atom to form distorted CrO5 trigonal bipyramids that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with two equivalent Zn(1)O6 octahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(13), one O(5), one O(9), and two equivalent O(7) atoms to form distorted ZnO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with four equivalent P(3)O4 tetrahedra,  an edgeedge with one Zn(1)O6 octahedra, and edges with two equivalent Cr(2)O5 trigonal bipyramids. In the second Zn site, Zn(2) is bonded to one O(10), one O(14), one O(2), one O(6), and two equivalent O(8) atoms to form distorted ZnO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with four equivalent P(4)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra, and edges with two equivalent Cr(1)O5 trigonal bipyramids. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O6 octahedra,  a cornercorner with one Zn(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Cr(1)O5 trigonal bipyramid, and corners with two equivalent Cr(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 48-51°. In the second P site, P(2) is bonded to one O(1), one O(12), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O6 octahedra,  a cornercorner with one Zn(2)O6 octahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Cr(2)O5 trigonal bipyramid, and corners with two equivalent Cr(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 48-51°. In the third P site, P(3) is bonded to one O(11), one O(13), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with four equivalent Zn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent Cr(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 30-53°. In the fourth P site, P(4) is bonded to one O(10), one O(12), one O(14), and one O(8) atom to form PO4 tetrahedra that share corners with four equivalent Zn(2)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Cr(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 30-53°. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(2), one Zn(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cr(1), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Cr(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Cr(2), one Zn(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Cr(1), one Zn(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Zn(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to two equivalent Zn(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(1), and one P(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Cr(1), one Zn(2), and one P(4) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Cr(2), one Zn(1), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Cr(1), one Zn(2), and one P(4) atom.
CrZnP2O7 crystallizes in the triclinic P-1 space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(10), one O(14), one O(2), one O(4), and one O(6) atom to form distorted CrO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and edges with two equivalent Zn(2)O6 octahedra. The Cr(1)-O(10) bond length is 2.56 Å. The Cr(1)-O(14) bond length is 2.09 Å. The Cr(1)-O(2) bond length is 2.07 Å. The Cr(1)-O(4) bond length is 2.04 Å. The Cr(1)-O(6) bond length is 2.10 Å. In the second Cr site, Cr(2) is bonded to one O(1), one O(13), one O(3), one O(5), and one O(9) atom to form distorted CrO5 trigonal bipyramids that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with two equivalent Zn(1)O6 octahedra. The Cr(2)-O(1) bond length is 2.07 Å. The Cr(2)-O(13) bond length is 2.09 Å. The Cr(2)-O(3) bond length is 2.04 Å. The Cr(2)-O(5) bond length is 2.10 Å. The Cr(2)-O(9) bond length is 2.55 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(13), one O(5), one O(9), and two equivalent O(7) atoms to form distorted ZnO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with four equivalent P(3)O4 tetrahedra,  an edgeedge with one Zn(1)O6 octahedra, and edges with two equivalent Cr(2)O5 trigonal bipyramids. The Zn(1)-O(1) bond length is 2.32 Å. The Zn(1)-O(13) bond length is 2.14 Å. The Zn(1)-O(5) bond length is 2.13 Å. The Zn(1)-O(9) bond length is 2.06 Å. There is one shorter (2.09 Å) and one longer (2.19 Å) Zn(1)-O(7) bond length. In the second Zn site, Zn(2) is bonded to one O(10), one O(14), one O(2), one O(6), and two equivalent O(8) atoms to form distorted ZnO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with four equivalent P(4)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra, and edges with two equivalent Cr(1)O5 trigonal bipyramids. The Zn(2)-O(10) bond length is 2.05 Å. The Zn(2)-O(14) bond length is 2.14 Å. The Zn(2)-O(2) bond length is 2.33 Å. The Zn(2)-O(6) bond length is 2.13 Å. There is one shorter (2.09 Å) and one longer (2.19 Å) Zn(2)-O(8) bond length. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O6 octahedra,  a cornercorner with one Zn(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Cr(1)O5 trigonal bipyramid, and corners with two equivalent Cr(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 48-51°. The P(1)-O(11) bond length is 1.61 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.51 Å. The P(1)-O(5) bond length is 1.55 Å. In the second P site, P(2) is bonded to one O(1), one O(12), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O6 octahedra,  a cornercorner with one Zn(2)O6 octahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Cr(2)O5 trigonal bipyramid, and corners with two equivalent Cr(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 48-51°. The P(2)-O(1) bond length is 1.54 Å. The P(2)-O(12) bond length is 1.61 Å. The P(2)-O(4) bond length is 1.51 Å. The P(2)-O(6) bond length is 1.55 Å. In the third P site, P(3) is bonded to one O(11), one O(13), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with four equivalent Zn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent Cr(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 30-53°. The P(3)-O(11) bond length is 1.60 Å. The P(3)-O(13) bond length is 1.55 Å. The P(3)-O(7) bond length is 1.54 Å. The P(3)-O(9) bond length is 1.52 Å. In the fourth P site, P(4) is bonded to one O(10), one O(12), one O(14), and one O(8) atom to form PO4 tetrahedra that share corners with four equivalent Zn(2)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Cr(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 30-53°. The P(4)-O(10) bond length is 1.52 Å. The P(4)-O(12) bond length is 1.60 Å. The P(4)-O(14) bond length is 1.55 Å. The P(4)-O(8) bond length is 1.54 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(2), one Zn(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cr(1), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Cr(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Cr(2), one Zn(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Cr(1), one Zn(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Zn(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to two equivalent Zn(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(1), and one P(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Cr(1), one Zn(2), and one P(4) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Cr(2), one Zn(1), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Cr(1), one Zn(2), and one P(4) atom.