Na8Al6Si6O24ICl crystallizes in the cubic P23 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to three equivalent O(1) and one I(1) atom to form distorted NaIO3 tetrahedra that share corners with three equivalent Na(1)IO3 tetrahedra, corners with three equivalent Al(1)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to three equivalent O(2) and one Cl(1) atom to form distorted NaClO3 tetrahedra that share corners with three equivalent Na(2)ClO3 tetrahedra, corners with three equivalent Al(1)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. Al(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form AlO4 tetrahedra that share corners with two equivalent Na(2)ClO3 tetrahedra, corners with two equivalent Na(1)IO3 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Na(2)ClO3 tetrahedra, corners with two equivalent Na(1)IO3 tetrahedra, and corners with four equivalent Al(1)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(2) is bonded in a 3-coordinate geometry to one Na(2), one Al(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Si(1) atom. I(1) is bonded in a tetrahedral geometry to four equivalent Na(1) atoms. Cl(1) is bonded in a tetrahedral geometry to four equivalent Na(2) atoms.
Na8Al6Si6O24ICl crystallizes in the cubic P23 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to three equivalent O(1) and one I(1) atom to form distorted NaIO3 tetrahedra that share corners with three equivalent Na(1)IO3 tetrahedra, corners with three equivalent Al(1)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. All Na(1)-O(1) bond lengths are 2.35 Å. The Na(1)-I(1) bond length is 3.02 Å. In the second Na site, Na(2) is bonded to three equivalent O(2) and one Cl(1) atom to form distorted NaClO3 tetrahedra that share corners with three equivalent Na(2)ClO3 tetrahedra, corners with three equivalent Al(1)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. All Na(2)-O(2) bond lengths are 2.40 Å. The Na(2)-Cl(1) bond length is 2.90 Å. Al(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form AlO4 tetrahedra that share corners with two equivalent Na(2)ClO3 tetrahedra, corners with two equivalent Na(1)IO3 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. Both Al(1)-O(1) bond lengths are 1.76 Å. Both Al(1)-O(2) bond lengths are 1.76 Å. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Na(2)ClO3 tetrahedra, corners with two equivalent Na(1)IO3 tetrahedra, and corners with four equivalent Al(1)O4 tetrahedra. Both Si(1)-O(1) bond lengths are 1.64 Å. Both Si(1)-O(2) bond lengths are 1.64 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a 3-coordinate geometry to one Na(2), one Al(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Si(1) atom. I(1) is bonded in a tetrahedral geometry to four equivalent Na(1) atoms. Cl(1) is bonded in a tetrahedral geometry to four equivalent Na(2) atoms.