DOE OSTI2020
KLi3Ca7Ti2(Si6O19)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. K is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of K–O bond distances ranging from 3.12–3.25 Å. There are three inequivalent Li sites. In the first Li site, Li is bonded in a distorted rectangular see-saw-like geometry to four O atoms. There are a spread of Li–O bond distances ranging from 1.93–1.95 Å. In the second Li site, Li is bonded in a distorted rectangular see-saw-like geometry to four O atoms. There are a spread of Li–O bond distances ranging from 1.93–1.95 Å. In the third Li site, Li is bonded in a distorted rectangular see-saw-like geometry to four O atoms. There are a spread of Li–O bond distances ranging from 1.94–1.96 Å. There are eight inequivalent Ca sites. In the first Ca site, Ca is bonded in a 8-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.48 Å. In the second Ca site, Ca is bonded in a 8-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.32–2.47 Å. In the third Ca site, Ca is bonded to six O atoms to form CaO6 octahedra that share corners with five SiO4 tetrahedra and edges with five CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.37–2.48 Å. In the fourth Ca site, Ca is bonded to six O atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra and edges with five CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.42–2.47 Å. In the fifth Ca site, Ca is bonded to six O atoms to form distorted CaO6 octahedra that share corners with five SiO4 tetrahedra and edges with five CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.35–2.47 Å. In the sixth Ca site, Ca is bonded to six O atoms to form CaO6 octahedra that share corners with five SiO4 tetrahedra and edges with five CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.36–2.49 Å. In the seventh Ca site, Ca is bonded to six O atoms to form distorted CaO6 octahedra that share corners with five SiO4 tetrahedra and edges with five CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.35–2.47 Å. In the eighth Ca site, Ca is bonded to six O atoms to form CaO6 octahedra that share corners with six SiO4 tetrahedra and edges with five CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.42–2.48 Å. There are two inequivalent Ti sites. In the first Ti site, Ti is bonded to six O atoms to form TiO6 octahedra that share corners with six SiO4 tetrahedra. There is three shorter (1.95 Å) and three longer (1.97 Å) Ti–O bond length. In the second Ti site, Ti is bonded to six O atoms to form TiO6 octahedra that share corners with six SiO4 tetrahedra. There is three shorter (1.95 Å) and three longer (1.97 Å) Ti–O bond length. There are twelve inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with two CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–61°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with two CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 31–60°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–72°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 35–73°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 38–70°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 34–69°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the seventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–72°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the eighth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with two CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 31–60°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the ninth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with two CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–60°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the tenth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 34–70°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the eleventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 39–70°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the twelfth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra, corners with three CaO6 octahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 35–73°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. There are thirty-eight inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the second O site, O is bonded in a distorted trigonal planar geometry to one Li, one Ti, and one Si atom. In the third O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the fourth O site, O is bonded in a distorted bent 150 degrees geometry to one K and two Si atoms. In the fifth O site, O is bonded in a distorted T-shaped geometry to one Li, one Ti, and one Si atom. In the sixth O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the seventh O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the eighth O site, O is bonded in a distorted trigonal planar geometry to one Li, one Ti, and one Si atom. In the ninth O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the tenth O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the eleventh O site, O is bonded in a distorted trigonal planar geometry to one Li, one Ti, and one Si atom. In the twelfth O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the thirteenth O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the fourteenth O site, O is bonded in a distorted trigonal planar geometry to one Li, one Ti, and one Si atom. In the fifteenth O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the sixteenth O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the seventeenth O site, O is bonded in a distorted T-shaped geometry to one Li, one Ti, and one Si atom. In the eighteenth O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the nineteenth O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the twentieth O site, O is bonded in a distorted trigonal planar geometry to one Li, one Ti, and one Si atom. In the twenty-first O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the twenty-second O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the twenty-third O site, O is bonded in a distorted T-shaped geometry to one Li, one Ti, and one Si atom. In the twenty-fourth O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the twenty-fifth O site, O is bonded in a distorted bent 150 degrees geometry to one K and two Si atoms. In the twenty-sixth O site, O is bonded in a distorted trigonal planar geometry to one Li, one Ti, and one Si atom. In the twenty-seventh O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the twenty-eighth O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the twenty-ninth O site, O is bonded in a distorted T-shaped geometry to one Li, one Ti, and one Si atom. In the thirtieth O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the thirty-first O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the thirty-second O site, O is bonded in a distorted trigonal planar geometry to one Li, one Ti, and one Si atom. In the thirty-third O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the thirty-fourth O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the thirty-fifth O site, O is bonded in a distorted trigonal planar geometry to one Li, one Ti, and one Si atom. In the thirty-sixth O site, O is bonded to three Ca and one Si atom to form a mixture of distorted edge and corner-sharing OCa3Si tetrahedra. In the thirty-seventh O site, O is bonded in a trigonal non-coplanar geometry to three Ca atoms. In the thirty-eighth O site, O is bonded in a trigonal non-coplanar geometry to three Ca atoms.