Be3Fe4Si3SO12 crystallizes in the cubic P-43n space group. Be(1) is bonded to four equivalent O(1) atoms to form BeO4 tetrahedra that share corners with four equivalent Fe(1)SO3 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Fe(1) is bonded to one S(1) and three equivalent O(1) atoms to form distorted FeSO3 tetrahedra that share corners with three equivalent Be(1)O4 tetrahedra, corners with three equivalent Fe(1)SO3 tetrahedra, and corners with three 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 Be(1)O4 tetrahedra and corners with four equivalent Fe(1)SO3 tetrahedra. S(1) is bonded in a tetrahedral geometry to four equivalent Fe(1) atoms. O(1) is bonded in a trigonal planar geometry to one Be(1), one Fe(1), and one Si(1) atom.
Be3Fe4Si3SO12 crystallizes in the cubic P-43n space group. Be(1) is bonded to four equivalent O(1) atoms to form BeO4 tetrahedra that share corners with four equivalent Fe(1)SO3 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. All Be(1)-O(1) bond lengths are 1.64 Å. Fe(1) is bonded to one S(1) and three equivalent O(1) atoms to form distorted FeSO3 tetrahedra that share corners with three equivalent Be(1)O4 tetrahedra, corners with three equivalent Fe(1)SO3 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. The Fe(1)-S(1) bond length is 2.39 Å. All Fe(1)-O(1) bond lengths are 2.05 Å. Si(1) is bonded to four equivalent O(1) atoms to form SiO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra and corners with four equivalent Fe(1)SO3 tetrahedra. All Si(1)-O(1) bond lengths are 1.65 Å. S(1) is bonded in a tetrahedral geometry to four equivalent Fe(1) atoms. O(1) is bonded in a trigonal planar geometry to one Be(1), one Fe(1), and one Si(1) atom.