CaMgLaAl2Si3HO13 crystallizes in the monoclinic P2_1/m space group. Ca(1) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(3) atoms. Mg(1) is bonded to one O(4), one O(8), two equivalent O(1), and two equivalent O(2) atoms to form MgO6 octahedra that share  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and edges with two equivalent Al(1)O6 octahedra. La(1) is bonded in a 11-coordinate geometry to one O(10), one O(7), two equivalent O(3), three equivalent O(8), and four equivalent O(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form AlO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. In the second Al site, Al(2) is bonded to two equivalent O(10), two equivalent O(3), and two equivalent O(6) atoms to form AlO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and edges with two equivalent Al(2)O6 octahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(7), one O(9), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the second Si site, Si(2) is bonded to one O(8), one O(9), and two equivalent O(3) atoms to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-55°. In the third Si site, Si(3) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and corners with two equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-56°. H(1) is bonded in a single-bond geometry to one O(10) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Mg(1), one Al(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OCaMgAlSi tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent La(1), and one Si(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one La(1), one Al(2), and one Si(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Mg(1) and two equivalent Al(1) atoms. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), two equivalent Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Al(2) and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Ca(1), one La(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Mg(1), three equivalent La(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one La(1), two equivalent Al(2), and one H(1) atom.
CaMgLaAl2Si3HO13 crystallizes in the monoclinic P2_1/m space group. Ca(1) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(3) atoms. The Ca(1)-O(5) bond length is 2.56 Å. The Ca(1)-O(7) bond length is 2.38 Å. Both Ca(1)-O(1) bond lengths are 2.40 Å. Both Ca(1)-O(3) bond lengths are 2.36 Å. Mg(1) is bonded to one O(4), one O(8), two equivalent O(1), and two equivalent O(2) atoms to form MgO6 octahedra that share  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and edges with two equivalent Al(1)O6 octahedra. The Mg(1)-O(4) bond length is 2.02 Å. The Mg(1)-O(8) bond length is 2.01 Å. Both Mg(1)-O(1) bond lengths are 2.21 Å. Both Mg(1)-O(2) bond lengths are 2.17 Å. La(1) is bonded in a 11-coordinate geometry to one O(10), one O(7), two equivalent O(3), three equivalent O(8), and four equivalent O(2) atoms. The La(1)-O(10) bond length is 2.68 Å. The La(1)-O(7) bond length is 2.34 Å. Both La(1)-O(3) bond lengths are 2.77 Å. There are two shorter (3.01 Å) and one longer (3.13 Å) La(1)-O(8) bond length. There are two shorter (2.53 Å) and two longer (2.69 Å) La(1)-O(2) bond lengths. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form AlO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. Both Al(1)-O(1) bond lengths are 2.00 Å. Both Al(1)-O(4) bond lengths are 1.85 Å. Both Al(1)-O(5) bond lengths are 2.00 Å. In the second Al site, Al(2) is bonded to two equivalent O(10), two equivalent O(3), and two equivalent O(6) atoms to form AlO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and edges with two equivalent Al(2)O6 octahedra. Both Al(2)-O(10) bond lengths are 1.92 Å. Both Al(2)-O(3) bond lengths are 1.88 Å. Both Al(2)-O(6) bond lengths are 1.93 Å. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(7), one O(9), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-56°. The Si(1)-O(7) bond length is 1.61 Å. The Si(1)-O(9) bond length is 1.66 Å. Both Si(1)-O(1) bond lengths are 1.65 Å. In the second Si site, Si(2) is bonded to one O(8), one O(9), and two equivalent O(3) atoms to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-55°. The Si(2)-O(8) bond length is 1.61 Å. The Si(2)-O(9) bond length is 1.65 Å. Both Si(2)-O(3) bond lengths are 1.65 Å. In the third Si site, Si(3) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and corners with two equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-56°. The Si(3)-O(5) bond length is 1.67 Å. The Si(3)-O(6) bond length is 1.67 Å. Both Si(3)-O(2) bond lengths are 1.64 Å. H(1) is bonded in a single-bond geometry to one O(10) atom. The H(1)-O(10) bond length is 1.00 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Mg(1), one Al(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OCaMgAlSi tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent La(1), and one Si(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one La(1), one Al(2), and one Si(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Mg(1) and two equivalent Al(1) atoms. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), two equivalent Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Al(2) and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Ca(1), one La(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Mg(1), three equivalent La(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one La(1), two equivalent Al(2), and one H(1) atom.