DOE OSTI2020
K3Na9Sr4(BO2)20 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 2-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.57–3.24 Å. In the second K1+ site, K1+ is bonded in a 2-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.57–3.25 Å. In the third K1+ site, K1+ is bonded in a 2-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.58–3.25 Å. There are nine inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 pentagonal pyramids that share an edgeedge with one NaO6 octahedra and an edgeedge with one BO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.30–2.66 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share an edgeedge with one NaO6 octahedra and an edgeedge with one BO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.30–2.65 Å. In the third Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share an edgeedge with one NaO6 pentagonal pyramid and an edgeedge with one BO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.29–2.65 Å. In the fourth Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share an edgeedge with one NaO6 octahedra and an edgeedge with one BO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.30–2.66 Å. In the fifth 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 2.39–2.82 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 2.38–2.79 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 2.38–2.80 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 2.39–2.79 Å. In the ninth Na1+ site, Na1+ is bonded in a 2-coordinate geometry to two O2- atoms. There are one shorter (2.35 Å) and one longer (2.54 Å) Na–O bond lengths. There are four inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.48–2.77 Å. In the second Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.78 Å. In the third Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–2.79 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.79 Å. There are twenty inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.33–1.42 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.33–1.42 Å. In the third B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.33–1.42 Å. In the fourth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.33–1.42 Å. In the fifth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.44 Å. In the sixth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.44 Å. In the seventh B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.44 Å. In the eighth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.44 Å. In the ninth B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share an edgeedge with one NaO6 pentagonal pyramid. There are a spread of B–O bond distances ranging from 1.48–1.50 Å. In the tenth B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share an edgeedge with one NaO6 octahedra. There are a spread of B–O bond distances ranging from 1.46–1.51 Å. In the eleventh B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share an edgeedge with one NaO6 octahedra. There are a spread of B–O bond distances ranging from 1.46–1.51 Å. In the twelfth B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share an edgeedge with one NaO6 octahedra. There are a spread of B–O bond distances ranging from 1.47–1.51 Å. In the thirteenth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.43 Å. In the fourteenth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.33–1.43 Å. In the fifteenth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.33–1.43 Å. In the sixteenth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.33–1.43 Å. In the seventeenth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.42 Å. In the eighteenth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.33–1.42 Å. In the nineteenth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.42 Å. In the twentieth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.42 Å. There are forty inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two B3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two B3+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two B3+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and two B3+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Sr2+, and two B3+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+, one Sr2+, and two B3+ atoms. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Sr2+, and two B3+ atoms. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+, one Sr2+, and two B3+ atoms. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to two Na1+, two Sr2+, and one B3+ atom. In the tenth O2- site, O2- is bonded in a distorted single-bond geometry to two Na1+, two Sr2+, and one B3+ atom. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two Na1+, two Sr2+, and one B3+ atom. In the twelfth O2- site, O2- is bonded in a distorted single-bond geometry to two Na1+, two Sr2+, and one B3+ atom. In the thirteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Na1+, one Sr2+, and two B3+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Na1+, one Sr2+, and two B3+ atoms. In the fifteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Na1+, one Sr2+, and two B3+ atoms. In the sixteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Na1+, one Sr2+, and two B3+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Na1+, and two B3+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+ and two B3+ atoms. In the nineteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+ and two B3+ atoms. In the twentieth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and two B3+ atoms. In the twenty-first O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two Na1+, one Sr2+, and one B3+ atom. In the twenty-second O2- site, O2- is bonded in a distorted single-bond geometry to two K1+, one Na1+, one Sr2+, and one B3+ atom. In the twenty-third O2- site, O2- is bonded in a distorted single-bond geometry to one K1+, one Na1+, one Sr2+, and one B3+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+, one Na1+, one Sr2+, and one B3+ atom. In the twenty-fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Sr2+, and two B3+ atoms. In the twenty-sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Sr2+, and two B3+ atoms. In the twenty-seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+ and two B3+ atoms. In the twenty-eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Sr2+, and two B3+ atoms. In the twenty-ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Na1+ and two B3+ atoms. In the thirtieth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Na1+ and two B3+ atoms. In the thirty-first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Na1+ and two B3+ atoms. In the thirty-second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Na1+ and two B3+ atoms. In the thirty-third O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sr2+, and one B3+ atom. In the thirty-fourth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two Na1+, one Sr2+, and one B3+ atom. In the thirty-fifth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two Na1+, one Sr2+, and one B3+ atom. In the thirty-sixth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two Na1+, one Sr2+, and one B3+ atom. In the thirty-seventh O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two Na1+, one Sr2+, and one B3+ atom. In the thirty-eighth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two Na1+, one Sr2+, and one B3+ atom. In the thirty-ninth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Sr2+, and one B3+ atom. In the fortieth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two Na1+, one Sr2+, and one B3+ atom.