Ag4Al3Si3O12I crystallizes in the cubic P-43n space group. Ag(1) is bonded to three equivalent O(1) and one I(1) atom to form AgIO3 tetrahedra that share corners with three equivalent Ag(1)IO3 tetrahedra, corners with three equivalent Al(1)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. Al(1) is bonded to four equivalent O(1) atoms to form AlO4 tetrahedra that share corners with four equivalent Ag(1)IO3 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to four equivalent O(1) atoms to form SiO4 tetrahedra that share corners with four equivalent Ag(1)IO3 tetrahedra and corners with four equivalent Al(1)O4 tetrahedra. O(1) is bonded in a 3-coordinate geometry to one Ag(1), one Al(1), and one Si(1) atom. I(1) is bonded in a tetrahedral geometry to four equivalent Ag(1) atoms.
Ag4Al3Si3O12I crystallizes in the cubic P-43n space group. Ag(1) is bonded to three equivalent O(1) and one I(1) atom to form AgIO3 tetrahedra that share corners with three equivalent Ag(1)IO3 tetrahedra, corners with three equivalent Al(1)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. All Ag(1)-O(1) bond lengths are 2.46 Å. The Ag(1)-I(1) bond length is 2.75 Å. Al(1) is bonded to four equivalent O(1) atoms to form AlO4 tetrahedra that share corners with four equivalent Ag(1)IO3 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. All Al(1)-O(1) bond lengths are 1.76 Å. Si(1) is bonded to four equivalent O(1) atoms to form SiO4 tetrahedra that share corners with four equivalent Ag(1)IO3 tetrahedra and corners with four equivalent Al(1)O4 tetrahedra. All Si(1)-O(1) bond lengths are 1.64 Å. O(1) is bonded in a 3-coordinate geometry to one Ag(1), one Al(1), and one Si(1) atom. I(1) is bonded in a tetrahedral geometry to four equivalent Ag(1) atoms.