(NaBa2Ce2Ti2FeSi8O27)2H2 crystallizes in the monoclinic C2 space group. The structure consists of two 1333-74-0 atoms inside a NaBa2Ce2Ti2FeSi8O27 framework. In the NaBa2Ce2Ti2FeSi8O27 framework, Na(1) is bonded to two equivalent O(11), two equivalent O(13), and two equivalent O(15) atoms to form distorted NaO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. Ba(1) is bonded in a 10-coordinate geometry to one O(10), one O(12), one O(3), one O(4), one O(7), one O(8), two equivalent O(1), and two equivalent O(9) atoms. Ce(1) is bonded in a 8-coordinate geometry to one O(11), one O(14), one O(15), one O(2), one O(5), one O(6), and two equivalent O(13) atoms. Ti(1) is bonded to one O(1), one O(12), one O(14), one O(2), one O(3), and one O(9) atom to form TiO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  an edgeedge with one Ti(1)O6 octahedra. Fe(1) is bonded to one O(6), two equivalent O(15), and two equivalent O(5) atoms to form FeO5 trigonal bipyramids that share corners with two equivalent Si(3)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Na(1)O6 octahedra. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(2), one O(4), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)O6 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-73°. In the second Si site, Si(2) is bonded to one O(10), one O(13), one O(4), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)O6 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-46°. In the third Si site, Si(3) is bonded to one O(1), one O(15), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)O6 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  a cornercorner with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 49-70°. In the fourth Si site, Si(4) is bonded to one O(10), one O(14), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and  a cornercorner with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 51°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one Ti(1), and one Si(3) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Ce(1), one Ti(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to two equivalent Ba(1) and two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ba(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Ce(1), one Fe(1), and one Si(4) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to two equivalent Ce(1) and one Fe(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Ba(1), one Si(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Si(3), and one Si(4) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one Ti(1), and one Si(2) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Si(2), and one Si(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Ce(1), and one Si(1) atom. In the twelfth O site, O(12) is bonded in a distorted L-shaped geometry to two equivalent Ba(1) and two equivalent Ti(1) atoms. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Ce(1), and one Si(2) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Ce(1), one Ti(1), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Na(1), one Ce(1), one Fe(1), and one Si(3) atom.
(NaBa2Ce2Ti2FeSi8O27)2H2 crystallizes in the monoclinic C2 space group. The structure consists of two 1333-74-0 atoms inside a NaBa2Ce2Ti2FeSi8O27 framework. In the NaBa2Ce2Ti2FeSi8O27 framework, Na(1) is bonded to two equivalent O(11), two equivalent O(13), and two equivalent O(15) atoms to form distorted NaO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. Both Na(1)-O(11) bond lengths are 2.30 Å. Both Na(1)-O(13) bond lengths are 2.82 Å. Both Na(1)-O(15) bond lengths are 2.43 Å. Ba(1) is bonded in a 10-coordinate geometry to one O(10), one O(12), one O(3), one O(4), one O(7), one O(8), two equivalent O(1), and two equivalent O(9) atoms. The Ba(1)-O(10) bond length is 2.89 Å. The Ba(1)-O(12) bond length is 2.93 Å. The Ba(1)-O(3) bond length is 2.85 Å. The Ba(1)-O(4) bond length is 3.04 Å. The Ba(1)-O(7) bond length is 3.10 Å. The Ba(1)-O(8) bond length is 2.81 Å. There is one shorter (2.77 Å) and one longer (3.18 Å) Ba(1)-O(1) bond length. There is one shorter (2.92 Å) and one longer (2.98 Å) Ba(1)-O(9) bond length. Ce(1) is bonded in a 8-coordinate geometry to one O(11), one O(14), one O(15), one O(2), one O(5), one O(6), and two equivalent O(13) atoms. The Ce(1)-O(11) bond length is 2.31 Å. The Ce(1)-O(14) bond length is 2.38 Å. The Ce(1)-O(15) bond length is 2.76 Å. The Ce(1)-O(2) bond length is 2.75 Å. The Ce(1)-O(5) bond length is 2.48 Å. The Ce(1)-O(6) bond length is 2.31 Å. There is one shorter (2.45 Å) and one longer (2.60 Å) Ce(1)-O(13) bond length. Ti(1) is bonded to one O(1), one O(12), one O(14), one O(2), one O(3), and one O(9) atom to form TiO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  an edgeedge with one Ti(1)O6 octahedra. The Ti(1)-O(1) bond length is 1.95 Å. The Ti(1)-O(12) bond length is 1.93 Å. The Ti(1)-O(14) bond length is 2.14 Å. The Ti(1)-O(2) bond length is 2.00 Å. The Ti(1)-O(3) bond length is 1.92 Å. The Ti(1)-O(9) bond length is 1.97 Å. Fe(1) is bonded to one O(6), two equivalent O(15), and two equivalent O(5) atoms to form FeO5 trigonal bipyramids that share corners with two equivalent Si(3)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Na(1)O6 octahedra. The Fe(1)-O(6) bond length is 1.98 Å. Both Fe(1)-O(15) bond lengths are 2.09 Å. Both Fe(1)-O(5) bond lengths are 2.25 Å. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(2), one O(4), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)O6 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-73°. The Si(1)-O(11) bond length is 1.62 Å. The Si(1)-O(2) bond length is 1.63 Å. The Si(1)-O(4) bond length is 1.66 Å. The Si(1)-O(7) bond length is 1.67 Å. In the second Si site, Si(2) is bonded to one O(10), one O(13), one O(4), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)O6 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-46°. The Si(2)-O(10) bond length is 1.67 Å. The Si(2)-O(13) bond length is 1.63 Å. The Si(2)-O(4) bond length is 1.67 Å. The Si(2)-O(9) bond length is 1.63 Å. In the third Si site, Si(3) is bonded to one O(1), one O(15), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)O6 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  a cornercorner with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 49-70°. The Si(3)-O(1) bond length is 1.64 Å. The Si(3)-O(15) bond length is 1.61 Å. The Si(3)-O(7) bond length is 1.67 Å. The Si(3)-O(8) bond length is 1.68 Å. In the fourth Si site, Si(4) is bonded to one O(10), one O(14), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and  a cornercorner with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 51°. The Si(4)-O(10) bond length is 1.67 Å. The Si(4)-O(14) bond length is 1.64 Å. The Si(4)-O(5) bond length is 1.62 Å. The Si(4)-O(8) bond length is 1.67 Å. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one Ti(1), and one Si(3) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Ce(1), one Ti(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to two equivalent Ba(1) and two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ba(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Ce(1), one Fe(1), and one Si(4) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to two equivalent Ce(1) and one Fe(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Ba(1), one Si(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Si(3), and one Si(4) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one Ti(1), and one Si(2) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Si(2), and one Si(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Ce(1), and one Si(1) atom. In the twelfth O site, O(12) is bonded in a distorted L-shaped geometry to two equivalent Ba(1) and two equivalent Ti(1) atoms. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Ce(1), and one Si(2) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Ce(1), one Ti(1), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Na(1), one Ce(1), one Fe(1), and one Si(3) atom.