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DOE OSTI2020

Materials Data on Na4Sn2C4SO16 by Materials Project

Na4Sn2C4SO16 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with three NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 59–85°. There are a spread of Na–O bond distances ranging from 2.31–2.62 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with four NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 56–85°. There are a spread of Na–O bond distances ranging from 2.37–2.59 Å. In the third Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with three NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 59–65°. There are a spread of Na–O bond distances ranging from 2.36–2.62 Å. In the fourth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.24–2.78 Å. In the fifth Na1+ site, Na1+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.34–2.57 Å. In the sixth Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with three NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 56–83°. There are a spread of Na–O bond distances ranging from 2.30–2.66 Å. In the seventh Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with three NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 83–85°. There are a spread of Na–O bond distances ranging from 2.28–2.62 Å. In the eighth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–2.69 Å. There are four inequivalent Sn3+ sites. In the first Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with two NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.08–2.15 Å. In the second Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share an edgeedge with one NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.07–2.14 Å. In the third Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with three NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.44–2.52 Å. In the fourth Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with four NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.31–2.62 Å. There are eight inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.33 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.26–1.33 Å. In the third C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.28–1.35 Å. In the fourth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.35 Å. In the fifth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.35 Å. In the sixth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.28–1.33 Å. In the seventh C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.26–1.33 Å. In the eighth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.27 Å) and two longer (1.32 Å) C–O bond length. There are two inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share an edgeedge with one NaO6 octahedra. There is two shorter (1.49 Å) and two longer (1.51 Å) S–O bond length. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share edges with four NaO6 octahedra. There are a spread of S–O bond distances ranging from 1.48–1.52 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two Na1+, one Sn3+, and one C4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one S6+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one S6+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the eleventh O2- site, O2- is bonded in an L-shaped geometry to one Na1+ and one S6+ atom. In the twelfth O2- site, O2- is bonded in an L-shaped geometry to one Na1+ and one S6+ atom. In the thirteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Na1+, one Sn3+, and one C4+ atom. In the fourteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Na1+, one Sn3+, and one C4+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the sixteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the seventeenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the eighteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the nineteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Na1+, one Sn3+, and one C4+ atom. In the twentieth O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the twenty-first O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one S6+ atom. In the twenty-second O2- site, O2- is bonded to three Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids. In the twenty-third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sn3+ and one C4+ atom. In the twenty-fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the twenty-fifth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the twenty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one S6+ atom. In the twenty-seventh O2- site, O2- is bonded to three Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids. In the twenty-eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the twenty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the thirtieth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the thirty-first O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the thirty-second O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2SnCSO7 by Materials Project

Na2SnCSO7 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.30–2.85 Å. Sn2+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Sn–O bond distances ranging from 2.26–2.67 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.26–1.33 Å. S6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of S–O bond distances ranging from 1.48–1.51 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Na1+ and one C4+ atom. In the second O2- site, O2- is bonded to two equivalent Na1+, one Sn2+, and one C4+ atom to form distorted edge-sharing ONa2SnC trigonal pyramids. In the third O2- site, O2- is bonded to two equivalent Na1+, one Sn2+, and one C4+ atom to form distorted edge-sharing ONa2SnC trigonal pyramids. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn2+, and one S6+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Na1+, one Sn2+, and one S6+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Na1+ and one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na6Sn2C4SO16 by Materials Project

Na6Sn2C4SO16 crystallizes in the cubic Fd-3 space group. The structure is three-dimensional. Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with eight equivalent NaO6 octahedra, edges with two equivalent SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 61–80°. There are a spread of Na–O bond distances ranging from 2.45–2.49 Å. Sn2+ is bonded to six equivalent O2- atoms to form SnO6 octahedra that share edges with six equivalent NaO6 octahedra. All Sn–O bond lengths are 2.51 Å. C4+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All C–O bond lengths are 1.30 Å. S6+ is bonded to four equivalent O2- atoms to form SO4 tetrahedra that share edges with six equivalent NaO6 octahedra. All S–O bond lengths are 1.50 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na1+, one Sn2+, and one C4+ atom. In the second O2- site, O2- is bonded to three equivalent Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na4Sn2C4SO16 by Materials Project

Na4Sn2C4SO16 crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with four equivalent NaO6 octahedra, edges with two equivalent SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 59–82°. There are a spread of Na–O bond distances ranging from 2.33–2.48 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with four equivalent NaO6 octahedra, edges with two equivalent SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 59–82°. There are a spread of Na–O bond distances ranging from 2.31–2.63 Å. Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with four NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.26–2.31 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.30 Å) and one longer (1.31 Å) C–O bond length. S6+ is bonded to four equivalent O2- atoms to form SO4 tetrahedra that share edges with four NaO6 octahedra. All S–O bond lengths are 1.50 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one S6+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na4Sn2C4SO16 by Materials Project

Na4Sn2C4SO16 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are sixteen inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–2.75 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with two NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 85–89°. There are a spread of Na–O bond distances ranging from 2.29–2.65 Å. In the third Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.30–2.86 Å. In the fourth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.34–2.79 Å. In the fifth Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with three NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 58–89°. There are a spread of Na–O bond distances ranging from 2.39–2.63 Å. In the sixth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.38–2.60 Å. In the seventh Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.33–2.76 Å. In the eighth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.37–2.70 Å. In the ninth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.26–2.66 Å. In the tenth Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with two NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 64–81°. There are a spread of Na–O bond distances ranging from 2.40–2.54 Å. In the eleventh Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with three NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 81–88°. There are a spread of Na–O bond distances ranging from 2.29–2.77 Å. In the twelfth Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with two NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 55–84°. There are a spread of Na–O bond distances ranging from 2.39–2.63 Å. In the thirteenth Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with two NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 58–62°. There are a spread of Na–O bond distances ranging from 2.39–2.66 Å. In the fourteenth Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with four NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 55–88°. There are a spread of Na–O bond distances ranging from 2.41–2.56 Å. In the fifteenth Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with four NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 62–85°. There are a spread of Na–O bond distances ranging from 2.43–2.61 Å. In the sixteenth Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with two NaO6 octahedra, edges with two SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 79–83°. There are a spread of Na–O bond distances ranging from 2.28–2.61 Å. There are eight inequivalent Sn3+ sites. In the first Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with three NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.42–2.54 Å. In the second Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share an edgeedge with one NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.06–2.14 Å. In the third Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with three NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.35–2.56 Å. In the fourth Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with two NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.36–2.63 Å. In the fifth Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with two NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.07–2.15 Å. In the sixth Sn3+ site, Sn3+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Sn–O bond distances ranging from 2.06–2.14 Å. In the seventh Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with five NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.38–2.60 Å. In the eighth Sn3+ site, Sn3+ is bonded to six O2- atoms to form SnO6 octahedra that share edges with two NaO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.08–2.13 Å. There are sixteen inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.36 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.26–1.33 Å. In the third C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.26 Å) and two longer (1.32 Å) C–O bond length. In the fourth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.27 Å) and two longer (1.32 Å) C–O bond length. In the fifth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.32 Å. In the sixth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.28 Å) and one longer (1.35 Å) C–O bond length. In the seventh C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.35 Å. In the eighth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.26–1.33 Å. In the ninth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.32 Å. In the tenth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.35 Å. In the eleventh C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.28 Å) and one longer (1.35 Å) C–O bond length. In the twelfth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.36 Å. In the thirteenth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.26–1.33 Å. In the fourteenth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.27 Å) and two longer (1.31 Å) C–O bond length. In the fifteenth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.28 Å) and one longer (1.34 Å) C–O bond length. In the sixteenth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.28 Å) and one longer (1.34 Å) C–O bond length. There are four inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share an edgeedge with one NaO6 octahedra. There are a spread of S–O bond distances ranging from 1.48–1.54 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share edges with three NaO6 octahedra. There is two shorter (1.49 Å) and two longer (1.50 Å) S–O bond length. In the third S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share edges with two NaO6 octahedra. All S–O bond lengths are 1.50 Å. In the fourth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share edges with three NaO6 octahedra. There is two shorter (1.49 Å) and two longer (1.50 Å) S–O bond length. There are sixty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the second O2- site, O2- is bonded in an L-shaped geometry to one Na1+ and one S6+ atom. In the third O2- site, O2- is bonded in a distorted T-shaped geometry to two Na1+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one Na1+, one Sn3+, and one C4+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the seventh O2- site, O2- is bonded in a distorted L-shaped geometry to one Na1+ and one S6+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the fourteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Sn3+, and one C4+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the sixteenth O2- site, O2- is bonded to three Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids. In the seventeenth O2- site, O2- is bonded to three Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids. In the eighteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the nineteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the twentieth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, and one C4+ atom. In the twenty-first O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the twenty-second O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the twenty-third O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sn3+, and one C4+ atom. In the twenty-fourth O2- site, O2- is bonded to three Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids. In the twenty-fifth O2- site, O2- is bonded to three Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids. In the twenty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Sn3+, an

36 MATERIALS SCIENCE↗