Na4CdZn(SiO3)4 crystallizes in the monoclinic C2 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and one O(6) atom. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(6) atom. Cd(1) is bonded to two equivalent O(2) and two equivalent O(6) atoms to form CdO4 tetrahedra that share corners with four equivalent Si(2)O4 tetrahedra. Zn(1) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form ZnO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Cd(1)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(2), one Cd(1), and one Si(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Si(1), and one Si(2) atom to form distorted ONa2Si2 trigonal pyramids that share  a cornercorner with one O(5)Na2ZnSi trigonal pyramid, corners with three equivalent O(6)Na2CdSi trigonal pyramids, and  an edgeedge with one O(5)Na2ZnSi trigonal pyramid. In the fifth O site, O(5) is bonded to one Na(1), one Na(2), one Zn(1), and one Si(1) atom to form distorted ONa2ZnSi trigonal pyramids that share  a cornercorner with one O(4)Na2Si2 trigonal pyramid,  a cornercorner with one O(5)Na2ZnSi trigonal pyramid, corners with two equivalent O(6)Na2CdSi trigonal pyramids, and  an edgeedge with one O(4)Na2Si2 trigonal pyramid. In the sixth O site, O(6) is bonded to one Na(1), one Na(2), one Cd(1), and one Si(2) atom to form distorted ONa2CdSi trigonal pyramids that share  a cornercorner with one O(6)Na2CdSi trigonal pyramid, corners with two equivalent O(5)Na2ZnSi trigonal pyramids, and corners with three equivalent O(4)Na2Si2 trigonal pyramids.
Na4CdZn(SiO3)4 crystallizes in the monoclinic C2 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and one O(6) atom. The Na(1)-O(1) bond length is 2.28 Å. The Na(1)-O(3) bond length is 2.57 Å. The Na(1)-O(4) bond length is 2.55 Å. The Na(1)-O(5) bond length is 2.40 Å. The Na(1)-O(6) bond length is 2.31 Å. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Na(2)-O(2) bond length is 2.35 Å. The Na(2)-O(3) bond length is 2.53 Å. The Na(2)-O(4) bond length is 2.56 Å. The Na(2)-O(5) bond length is 2.42 Å. The Na(2)-O(6) bond length is 2.38 Å. Cd(1) is bonded to two equivalent O(2) and two equivalent O(6) atoms to form CdO4 tetrahedra that share corners with four equivalent Si(2)O4 tetrahedra. Both Cd(1)-O(2) bond lengths are 2.18 Å. Both Cd(1)-O(6) bond lengths are 2.19 Å. Zn(1) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form ZnO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. Both Zn(1)-O(1) bond lengths are 1.96 Å. Both Zn(1)-O(5) bond lengths are 1.99 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. The Si(1)-O(1) bond length is 1.62 Å. The Si(1)-O(3) bond length is 1.69 Å. The Si(1)-O(4) bond length is 1.69 Å. The Si(1)-O(5) bond length is 1.62 Å. In the second Si site, Si(2) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Cd(1)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. The Si(2)-O(2) bond length is 1.62 Å. The Si(2)-O(3) bond length is 1.69 Å. The Si(2)-O(4) bond length is 1.68 Å. The Si(2)-O(6) bond length is 1.63 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(2), one Cd(1), and one Si(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Si(1), and one Si(2) atom to form distorted ONa2Si2 trigonal pyramids that share  a cornercorner with one O(5)Na2ZnSi trigonal pyramid, corners with three equivalent O(6)Na2CdSi trigonal pyramids, and  an edgeedge with one O(5)Na2ZnSi trigonal pyramid. In the fifth O site, O(5) is bonded to one Na(1), one Na(2), one Zn(1), and one Si(1) atom to form distorted ONa2ZnSi trigonal pyramids that share  a cornercorner with one O(4)Na2Si2 trigonal pyramid,  a cornercorner with one O(5)Na2ZnSi trigonal pyramid, corners with two equivalent O(6)Na2CdSi trigonal pyramids, and  an edgeedge with one O(4)Na2Si2 trigonal pyramid. In the sixth O site, O(6) is bonded to one Na(1), one Na(2), one Cd(1), and one Si(2) atom to form distorted ONa2CdSi trigonal pyramids that share  a cornercorner with one O(6)Na2CdSi trigonal pyramid, corners with two equivalent O(5)Na2ZnSi trigonal pyramids, and corners with three equivalent O(4)Na2Si2 trigonal pyramids.