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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on KSnF3 by Materials Project

KSnF3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 5-coordinate geometry to five F1- atoms. There are a spread of K–F bond distances ranging from 2.70–2.77 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of K–F bond distances ranging from 2.73–3.02 Å. In the third K1+ site, K1+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of K–F bond distances ranging from 2.69–2.96 Å. In the fourth K1+ site, K1+ is bonded in a 7-coordinate geometry to seven F1- atoms. There are a spread of K–F bond distances ranging from 2.66–3.09 Å. There are four inequivalent Sn2+ sites. In the first Sn2+ site, Sn2+ is bonded in a distorted rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.08–2.31 Å. In the second Sn2+ site, Sn2+ is bonded in a distorted rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.08–2.28 Å. In the third Sn2+ site, Sn2+ is bonded in a distorted rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.08–2.51 Å. In the fourth Sn2+ site, Sn2+ is bonded in a rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.07–2.53 Å. There are twelve inequivalent F1- sites. In the first F1- site, F1- is bonded to two K1+ and two Sn2+ atoms to form distorted FK2Sn2 tetrahedra that share corners with three FK2Sn2 tetrahedra, a cornercorner with one FK2Sn2 trigonal pyramid, and an edgeedge with one FK3Sn tetrahedra. In the second F1- site, F1- is bonded to two K1+ and two Sn2+ atoms to form distorted corner-sharing FK2Sn2 tetrahedra. In the third F1- site, F1- is bonded in a 1-coordinate geometry to three K1+ and one Sn2+ atom. In the fourth F1- site, F1- is bonded in a 3-coordinate geometry to two equivalent K1+ and one Sn2+ atom. In the fifth F1- site, F1- is bonded in a 4-coordinate geometry to three K1+ and one Sn2+ atom. In the sixth F1- site, F1- is bonded in a 3-coordinate geometry to two equivalent K1+ and one Sn2+ atom. In the seventh F1- site, F1- is bonded in a 1-coordinate geometry to three K1+ and one Sn2+ atom. In the eighth F1- site, F1- is bonded in a 4-coordinate geometry to three K1+ and one Sn2+ atom. In the ninth F1- site, F1- is bonded to two K1+ and two Sn2+ atoms to form distorted FK2Sn2 trigonal pyramids that share corners with two FK2Sn2 tetrahedra and an edgeedge with one FK3Sn tetrahedra. In the tenth F1- site, F1- is bonded in a distorted trigonal planar geometry to one K1+ and two Sn2+ atoms. In the eleventh F1- site, F1- is bonded in a 3-coordinate geometry to two K1+ and one Sn2+ atom. In the twelfth F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form a mixture of distorted edge and corner-sharing FK3Sn tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KSn2F5 by Materials Project

KSn2F5 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of one KSn2F5 sheet oriented in the (0, 1, 0) direction. there are six inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a body-centered cubic geometry to eight F1- atoms. There are a spread of K–F bond distances ranging from 2.67–2.88 Å. In the second K1+ site, K1+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of K–F bond distances ranging from 2.71–3.01 Å. In the third K1+ site, K1+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of K–F bond distances ranging from 2.65–3.07 Å. In the fourth K1+ site, K1+ is bonded in a body-centered cubic geometry to eight F1- atoms. There are a spread of K–F bond distances ranging from 2.68–2.88 Å. In the fifth K1+ site, K1+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of K–F bond distances ranging from 2.71–3.11 Å. In the sixth K1+ site, K1+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of K–F bond distances ranging from 2.69–3.12 Å. There are twelve inequivalent Sn2+ sites. In the first Sn2+ site, Sn2+ is bonded in a rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.04–2.39 Å. In the second Sn2+ site, Sn2+ is bonded in a rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.04–2.32 Å. In the third Sn2+ site, Sn2+ is bonded in a 5-coordinate geometry to five F1- atoms. There are a spread of Sn–F bond distances ranging from 2.05–2.72 Å. In the fourth Sn2+ site, Sn2+ is bonded in a rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.06–2.32 Å. In the fifth Sn2+ site, Sn2+ is bonded in a 4-coordinate geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.05–2.46 Å. In the sixth Sn2+ site, Sn2+ is bonded to five F1- atoms to form distorted corner-sharing SnF5 square pyramids. There are a spread of Sn–F bond distances ranging from 2.05–2.58 Å. In the seventh Sn2+ site, Sn2+ is bonded in a distorted rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.04–2.61 Å. In the eighth Sn2+ site, Sn2+ is bonded in a distorted square pyramidal geometry to five F1- atoms. There are a spread of Sn–F bond distances ranging from 2.04–2.53 Å. In the ninth Sn2+ site, Sn2+ is bonded in a distorted rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.04–2.62 Å. In the tenth Sn2+ site, Sn2+ is bonded to five F1- atoms to form distorted corner-sharing SnF5 square pyramids. There are a spread of Sn–F bond distances ranging from 2.05–2.57 Å. In the eleventh Sn2+ site, Sn2+ is bonded in a 5-coordinate geometry to five F1- atoms. There are a spread of Sn–F bond distances ranging from 2.06–2.74 Å. In the twelfth Sn2+ site, Sn2+ is bonded in a distorted square pyramidal geometry to five F1- atoms. There are a spread of Sn–F bond distances ranging from 2.05–2.52 Å. There are thirty inequivalent F1- sites. In the first F1- site, F1- is bonded in a 1-coordinate geometry to one K1+ and three Sn2+ atoms. In the second F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form a mixture of distorted edge and corner-sharing FK3Sn tetrahedra. In the third F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form distorted FK3Sn tetrahedra that share corners with eight FK3Sn tetrahedra, a cornercorner with one FKSn3 trigonal pyramid, edges with three FK3Sn tetrahedra, and an edgeedge with one FKSn3 trigonal pyramid. In the fourth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the fifth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the sixth F1- site, F1- is bonded to one K1+ and three Sn2+ atoms to form distorted FKSn3 trigonal pyramids that share corners with two FK3Sn tetrahedra, a cornercorner with one FKSn3 trigonal pyramid, and edges with three FK3Sn tetrahedra. In the seventh F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form distorted FK3Sn tetrahedra that share corners with eight FK3Sn tetrahedra, a cornercorner with one FKSn3 trigonal pyramid, edges with three FK3Sn tetrahedra, and an edgeedge with one FKSn3 trigonal pyramid. In the eighth F1- site, F1- is bonded in a 3-coordinate geometry to one K1+ and two Sn2+ atoms. In the ninth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the tenth F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form a mixture of distorted edge and corner-sharing FK3Sn tetrahedra. In the eleventh F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form distorted FK3Sn tetrahedra that share corners with seven FK3Sn tetrahedra, a cornercorner with one FKSn3 trigonal pyramid, edges with three FK3Sn tetrahedra, and an edgeedge with one FKSn3 trigonal pyramid. In the twelfth F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form a mixture of distorted edge and corner-sharing FK3Sn tetrahedra. In the thirteenth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the fourteenth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the fifteenth F1- site, F1- is bonded in a 4-coordinate geometry to one K1+ and three Sn2+ atoms. In the sixteenth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and three Sn2+ atoms. In the seventeenth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Sn2+ atoms. In the eighteenth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the nineteenth F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form a mixture of distorted edge and corner-sharing FK3Sn tetrahedra. In the twentieth F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form distorted FK3Sn tetrahedra that share corners with nine FK3Sn tetrahedra, a cornercorner with one FKSn3 trigonal pyramid, edges with two FK3Sn tetrahedra, and an edgeedge with one FKSn3 trigonal pyramid. In the twenty-first F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form a mixture of distorted edge and corner-sharing FK3Sn tetrahedra. In the twenty-second F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the twenty-third F1- site, F1- is bonded in a 4-coordinate geometry to three K1+ and one Sn2+ atom. In the twenty-fourth F1- site, F1- is bonded in a 4-coordinate geometry to one K1+ and three Sn2+ atoms. In the twenty-fifth F1- site, F1- is bonded to one K1+ and three Sn2+ atoms to form distorted FKSn3 trigonal pyramids that share corners with three FK3Sn tetrahedra, a cornercorner with one FKSn3 trigonal pyramid, and edges with two FK3Sn tetrahedra. In the twenty-sixth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the twenty-seventh F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one K1+ and two Sn2+ atoms. In the twenty-eighth F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form distorted FK3Sn tetrahedra that share corners with eight FK3Sn tetrahedra, a cornercorner with one FKSn3 trigonal pyramid, edges with two FK3Sn tetrahedra, and an edgeedge with one FKSn3 trigonal pyramid. In the twenty-ninth F1- site, F1- is bonded to three K1+ and one Sn2+ atom to form a mixture of distorted edge and corner-sharing FK3Sn tetrahedra. In the thirtieth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Sn2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2SnF6 by Materials Project

K2SnF6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent F1- atoms to form KF12 cuboctahedra that share corners with twelve equivalent KF12 cuboctahedra, faces with six equivalent KF12 cuboctahedra, and faces with four equivalent SnF6 octahedra. All K–F bond lengths are 3.05 Å. Sn4+ is bonded to six equivalent F1- atoms to form SnF6 octahedra that share faces with eight equivalent KF12 cuboctahedra. All Sn–F bond lengths are 2.00 Å. F1- is bonded in a distorted single-bond geometry to four equivalent K1+ and one Sn4+ atom.

36 MATERIALS SCIENCE↗