Na4Ca4Be4AlSi7(O6F)4 crystallizes in the tetragonal I-4 space group. Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), one O(5), two equivalent O(6), and two equivalent F(1) atoms. Ca(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(5), two equivalent O(1), two equivalent O(3), and one F(1) atom. Be(1) is bonded to one O(3), one O(4), one O(5), and one F(1) atom to form BeO3F tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. Al(1) is bonded to four equivalent O(2) atoms to form AlO4 tetrahedra that share corners with four equivalent Si(2)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(3) is bonded to four equivalent O(4) atoms to form SiO4 tetrahedra that share corners with four equivalent Be(1)O3F tetrahedra. In the second Si site, Si(1) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form SiO4 tetrahedra that share corners with two equivalent Be(1)O3F tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. In the third Si site, Si(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Be(1)O3F tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra, and  a cornercorner with one Si(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Be(1), and one Si(2) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Ca(1), and one Si(2) atom. In the third O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Al(1), and one Si(2) atom. In the fourth O site, O(6) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(1), one Si(1), and one Si(2) atom. In the fifth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Be(1), and one Si(1) atom. In the sixth O site, O(4) is bonded in a 2-coordinate geometry to one Na(1), one Ca(1), one Be(1), and one Si(3) atom. F(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Ca(1), and one Be(1) atom.
Na4Ca4Be4AlSi7(O6F)4 crystallizes in the tetragonal I-4 space group. Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), one O(5), two equivalent O(6), and two equivalent F(1) atoms. The Na(1)-O(1) bond length is 2.56 Å. The Na(1)-O(2) bond length is 2.39 Å. The Na(1)-O(4) bond length is 2.77 Å. The Na(1)-O(5) bond length is 2.34 Å. There is one shorter (2.55 Å) and one longer (2.88 Å) Na(1)-O(6) bond length. There is one shorter (2.40 Å) and one longer (2.68 Å) Na(1)-F(1) bond length. Ca(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(5), two equivalent O(1), two equivalent O(3), and one F(1) atom. The Ca(1)-O(2) bond length is 2.74 Å. The Ca(1)-O(4) bond length is 2.45 Å. The Ca(1)-O(5) bond length is 2.42 Å. There is one shorter (2.39 Å) and one longer (2.48 Å) Ca(1)-O(1) bond length. There is one shorter (2.43 Å) and one longer (2.73 Å) Ca(1)-O(3) bond length. The Ca(1)-F(1) bond length is 2.55 Å. Be(1) is bonded to one O(3), one O(4), one O(5), and one F(1) atom to form BeO3F tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The Be(1)-O(3) bond length is 1.66 Å. The Be(1)-O(4) bond length is 1.66 Å. The Be(1)-O(5) bond length is 1.60 Å. The Be(1)-F(1) bond length is 1.59 Å. Al(1) is bonded to four equivalent O(2) atoms to form AlO4 tetrahedra that share corners with four equivalent Si(2)O4 tetrahedra. All Al(1)-O(2) bond lengths are 1.77 Å. There are three inequivalent Si sites. In the first Si site, Si(3) is bonded to four equivalent O(4) atoms to form SiO4 tetrahedra that share corners with four equivalent Be(1)O3F tetrahedra. All Si(3)-O(4) bond lengths are 1.65 Å. In the second Si site, Si(1) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form SiO4 tetrahedra that share corners with two equivalent Be(1)O3F tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. Both Si(1)-O(3) bond lengths are 1.64 Å. Both Si(1)-O(6) bond lengths are 1.66 Å. In the third Si site, Si(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Be(1)O3F tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The Si(2)-O(1) bond length is 1.62 Å. The Si(2)-O(2) bond length is 1.66 Å. The Si(2)-O(5) bond length is 1.63 Å. The Si(2)-O(6) bond length is 1.68 Å. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Be(1), and one Si(2) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Ca(1), and one Si(2) atom. In the third O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Al(1), and one Si(2) atom. In the fourth O site, O(6) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(1), one Si(1), and one Si(2) atom. In the fifth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Be(1), and one Si(1) atom. In the sixth O site, O(4) is bonded in a 2-coordinate geometry to one Na(1), one Ca(1), one Be(1), and one Si(3) atom. F(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Ca(1), and one Be(1) atom.