KMg3AlSi3O11F crystallizes in the triclinic P1 space group. K(1) is bonded in a 12-coordinate geometry to two equivalent O(10), two equivalent O(3), two equivalent O(4), two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(11), one O(2), one O(5), one O(6), and one F(1) atom to form MgO5F octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(2)O5F octahedra, and edges with three equivalent Mg(3)O5F octahedra. In the second Mg site, Mg(2) is bonded to one O(1), one O(11), one O(2), one O(5), one O(6), and one F(1) atom to form MgO5F octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(1)O5F octahedra, and edges with three equivalent Mg(3)O5F octahedra. In the third Mg site, Mg(3) is bonded to one O(1), one O(11), one O(2), one O(5), one O(6), and one F(1) atom to form MgO5F octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(1)O5F octahedra, and edges with three equivalent Mg(2)O5F octahedra. Al(1) is bonded to one O(1), one O(7), one O(8), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mg(2)O5F octahedra,  a cornercorner with one Mg(3)O5F octahedra, and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 61-62°. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mg(2)O5F octahedra,  a cornercorner with one Mg(3)O5F octahedra, and corners with three equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-59°. In the second Si site, Si(2) is bonded to one O(10), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mg(2)O5F octahedra,  a cornercorner with one Mg(3)O5F octahedra, and corners with three equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-58°. In the third Si site, Si(3) is bonded to one O(10), one O(3), one O(4), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mg(2)O5F octahedra,  a cornercorner with one Mg(3)O5F octahedra, and corners with three equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-58°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted tetrahedral geometry to one Mg(1), one Mg(2), one Mg(3), and one Al(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one Mg(3) atom. F(1) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one Mg(3) atom.
KMg3AlSi3O11F crystallizes in the triclinic P1 space group. K(1) is bonded in a 12-coordinate geometry to two equivalent O(10), two equivalent O(3), two equivalent O(4), two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms. There is one shorter (3.34 Å) and one longer (3.36 Å) K(1)-O(10) bond length. There is one shorter (3.33 Å) and one longer (3.36 Å) K(1)-O(3) bond length. There is one shorter (3.32 Å) and one longer (3.37 Å) K(1)-O(4) bond length. There is one shorter (2.99 Å) and one longer (3.03 Å) K(1)-O(7) bond length. There is one shorter (3.00 Å) and one longer (3.08 Å) K(1)-O(8) bond length. There is one shorter (3.02 Å) and one longer (3.03 Å) K(1)-O(9) bond length. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(11), one O(2), one O(5), one O(6), and one F(1) atom to form MgO5F octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(2)O5F octahedra, and edges with three equivalent Mg(3)O5F octahedra. The Mg(1)-O(1) bond length is 2.05 Å. The Mg(1)-O(11) bond length is 2.03 Å. The Mg(1)-O(2) bond length is 2.15 Å. The Mg(1)-O(5) bond length is 2.11 Å. The Mg(1)-O(6) bond length is 2.16 Å. The Mg(1)-F(1) bond length is 2.02 Å. In the second Mg site, Mg(2) is bonded to one O(1), one O(11), one O(2), one O(5), one O(6), and one F(1) atom to form MgO5F octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(1)O5F octahedra, and edges with three equivalent Mg(3)O5F octahedra. The Mg(2)-O(1) bond length is 2.05 Å. The Mg(2)-O(11) bond length is 2.06 Å. The Mg(2)-O(2) bond length is 2.12 Å. The Mg(2)-O(5) bond length is 2.15 Å. The Mg(2)-O(6) bond length is 2.12 Å. The Mg(2)-F(1) bond length is 2.07 Å. In the third Mg site, Mg(3) is bonded to one O(1), one O(11), one O(2), one O(5), one O(6), and one F(1) atom to form MgO5F octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(1)O5F octahedra, and edges with three equivalent Mg(2)O5F octahedra. The Mg(3)-O(1) bond length is 2.05 Å. The Mg(3)-O(11) bond length is 2.04 Å. The Mg(3)-O(2) bond length is 2.08 Å. The Mg(3)-O(5) bond length is 2.13 Å. The Mg(3)-O(6) bond length is 2.10 Å. The Mg(3)-F(1) bond length is 2.09 Å. Al(1) is bonded to one O(1), one O(7), one O(8), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mg(2)O5F octahedra,  a cornercorner with one Mg(3)O5F octahedra, and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 61-62°. The Al(1)-O(1) bond length is 1.78 Å. The Al(1)-O(7) bond length is 1.74 Å. The Al(1)-O(8) bond length is 1.73 Å. The Al(1)-O(9) bond length is 1.73 Å. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mg(2)O5F octahedra,  a cornercorner with one Mg(3)O5F octahedra, and corners with three equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-59°. The Si(1)-O(2) bond length is 1.67 Å. The Si(1)-O(7) bond length is 1.62 Å. The Si(1)-O(8) bond length is 1.62 Å. The Si(1)-O(9) bond length is 1.62 Å. In the second Si site, Si(2) is bonded to one O(10), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mg(2)O5F octahedra,  a cornercorner with one Mg(3)O5F octahedra, and corners with three equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-58°. The Si(2)-O(10) bond length is 1.66 Å. The Si(2)-O(3) bond length is 1.67 Å. The Si(2)-O(4) bond length is 1.66 Å. The Si(2)-O(5) bond length is 1.62 Å. In the third Si site, Si(3) is bonded to one O(10), one O(3), one O(4), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mg(2)O5F octahedra,  a cornercorner with one Mg(3)O5F octahedra, and corners with three equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-58°. The Si(3)-O(10) bond length is 1.66 Å. The Si(3)-O(3) bond length is 1.67 Å. The Si(3)-O(4) bond length is 1.67 Å. The Si(3)-O(6) bond length is 1.62 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted tetrahedral geometry to one Mg(1), one Mg(2), one Mg(3), and one Al(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one Mg(3) atom. F(1) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one Mg(3) atom.