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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on K2B6H2O11 by Materials Project

K2B6H2O11 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 7-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.72–3.05 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.76–3.04 Å. There are six 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 1.36–1.39 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 1.36–1.41 Å. In the third B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of B–O bond distances ranging from 1.46–1.50 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 1.36–1.40 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 1.36–1.41 Å. In the sixth B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.48 Å) and one longer (1.49 Å) B–O bond length. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and two B3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two K1+ and two B3+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to two K1+, one B3+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+ and two B3+ atoms. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two K1+ and two B3+ atoms. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+, one B3+, and one H1+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and two B3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+ and two B3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2B10H13O2 by Materials Project

K2B10H13O2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a 7-coordinate geometry to six H and one O atom. There are a spread of K–H bond distances ranging from 2.73–2.92 Å. The K–O bond length is 2.86 Å. In the second K site, K is bonded in a 11-coordinate geometry to nine H and two O atoms. There are a spread of K–H bond distances ranging from 2.74–3.06 Å. There are one shorter (3.04 Å) and one longer (3.25 Å) K–O bond lengths. There are ten inequivalent B sites. In the first B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.20 Å. In the second B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.21 Å. In the third B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.21 Å. In the fourth B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.21 Å. In the fifth B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.21 Å. In the sixth B site, B is bonded in a distorted single-bond geometry to one B and one H atom. The B–B bond length is 1.73 Å. The B–H bond length is 1.21 Å. In the seventh B site, B is bonded in a single-bond geometry to one B and one H atom. The B–B bond length is 1.73 Å. The B–H bond length is 1.22 Å. In the eighth B site, B is bonded in a distorted single-bond geometry to one B and one H atom. The B–B bond length is 1.72 Å. The B–H bond length is 1.20 Å. In the ninth B site, B is bonded in a distorted single-bond geometry to one B and one H atom. The B–B bond length is 1.72 Å. The B–H bond length is 1.21 Å. In the tenth B site, B is bonded in a 5-coordinate geometry to five B atoms. The B–B bond length is 1.69 Å. There are thirteen inequivalent H sites. In the first H site, H is bonded in a distorted single-bond geometry to two equivalent K and one B atom. In the second H site, H is bonded in a distorted water-like geometry to one K and one B atom. In the third H site, H is bonded in a distorted single-bond geometry to two equivalent K and one B atom. In the fourth H site, H is bonded in a single-bond geometry to one K and one B atom. In the fifth H site, H is bonded in a distorted single-bond geometry to two K and one B atom. In the sixth H site, H is bonded in a distorted single-bond geometry to two K and one B atom. In the seventh H site, H is bonded in a distorted single-bond geometry to one K and one B atom. In the eighth H site, H is bonded in a distorted single-bond geometry to two equivalent K and one B atom. In the ninth H site, H is bonded in a single-bond geometry to one K and one B atom. In the tenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the eleventh H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the twelfth H site, H is bonded in a single-bond geometry to one K and one O atom. The H–O bond length is 0.97 Å. In the thirteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. There are two inequivalent O sites. In the first O site, O is bonded in a water-like geometry to two K and two H atoms. In the second O site, O is bonded in a water-like geometry to one K and two H atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2B10H9O by Materials Project

K2B4H4OB5H4BH crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four boranediylradical molecules, two B5H4 clusters, and two K2B4H4O clusters. In each B5H4 cluster, there are five inequivalent B sites. In the first B site, B is bonded in a distorted single-bond geometry to one B and one H atom. The B–B bond length is 1.76 Å. The B–H bond length is 1.20 Å. In the second B site, B is bonded in a distorted single-bond geometry to one B and one H atom. The B–B bond length is 1.74 Å. The B–H bond length is 1.20 Å. In the third B site, B is bonded in a distorted single-bond geometry to one B and one H atom. The B–B bond length is 1.75 Å. The B–H bond length is 1.20 Å. In the fourth B site, B is bonded in a distorted single-bond geometry to one B and one H atom. The B–B bond length is 1.75 Å. The B–H bond length is 1.20 Å. In the fifth B site, B is bonded in a 5-coordinate geometry to five B atoms. The B–B bond length is 1.65 Å. There are four inequivalent H sites. In the first H site, H is bonded in a distorted single-bond geometry to one B atom. In the second H site, H is bonded in a distorted single-bond geometry to one B atom. In the third H site, H is bonded in a single-bond geometry to one B atom. In the fourth H site, H is bonded in a single-bond geometry to one B atom. In each K2B4H4O cluster, there are two inequivalent K sites. In the first K site, K is bonded in a 1-coordinate geometry to one O atom. The K–O bond length is 2.66 Å. In the second K site, K is bonded in a 1-coordinate geometry to five H and one O atom. There are a spread of K–H bond distances ranging from 2.67–2.96 Å. The K–O bond length is 2.62 Å. There are four inequivalent B sites. In the first B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.20 Å. In the second B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.20 Å. In the third B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.21 Å. In the fourth B site, B is bonded in a distorted single-bond geometry to one H atom. The B–H bond length is 1.21 Å. There are four inequivalent H sites. In the first H site, H is bonded in a distorted single-bond geometry to one K and one B atom. In the second H site, H is bonded in a distorted single-bond geometry to two equivalent K and one B atom. In the third H site, H is bonded in a distorted single-bond geometry to one K and one B atom. In the fourth H site, H is bonded in a single-bond geometry to one K and one B atom. O is bonded in a bent 120 degrees geometry to two K atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KB5(H2O3)4 by Materials Project

KB5H8O12 crystallizes in the orthorhombic Aea2 space group. The structure is two-dimensional and consists of two KB5H8O12 sheets oriented in the (0, 1, 0) direction. K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.86–3.03 Å. There are three inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.48 Å) and two longer (1.49 Å) B–O bond length. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.37 Å) and one longer (1.39 Å) B–O bond length. In the third B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.37 Å) and one longer (1.39 Å) B–O bond length. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the second O2- site, O2- is bonded in a distorted water-like geometry to one B3+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one B3+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one K1+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2B5H5O11 by Materials Project

K2B5H5O11 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to one H1+ and eight O2- atoms. The K–H bond length is 2.75 Å. There are a spread of K–O bond distances ranging from 2.73–2.92 Å. In the second K1+ site, K1+ is bonded in a 10-coordinate geometry to two H1+ and eight O2- atoms. There are one shorter (2.83 Å) and one longer (3.07 Å) K–H bond lengths. There are a spread of K–O bond distances ranging from 2.66–2.97 Å. There are five inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.47–1.50 Å. In the second B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.46–1.50 Å. In the third B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.37 Å) and two longer (1.38 Å) B–O bond length. 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 1.36–1.40 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 1.36–1.42 Å. There are five inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two K1+ and two B3+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and two B3+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and two B3+ atoms. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+ and two B3+ atoms. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+ and two B3+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two K1+, one B3+, and one H1+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and two B3+ atoms. In the tenth O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms. In the eleventh O2- site, O2- is bonded in a water-like geometry to one K1+ and two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KB3(H3O4)2 by Materials Project

(KB3H5O7)2H2O2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional and consists of eight water molecules and one KB3H5O7 framework. In the KB3H5O7 framework, there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 2-coordinate geometry to two equivalent H1+ and six O2- atoms. Both K–H bond lengths are 3.08 Å. There are a spread of K–O bond distances ranging from 2.69–3.22 Å. In the second K1+ site, K1+ is bonded in a 2-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.65–3.10 Å. There are three inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.28 Å) B–O bond length. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.29 Å) and two longer (1.44 Å) B–O bond length. In the third B3+ site, B3+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.29 Å) B–O bond length. There are five inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.17 Å) and one longer (1.25 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.54 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a single-bond geometry to one H1+ atom. The H–H bond length is 0.75 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one H1+ atom. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one K1+ and two B3+ atoms. In the second O2- site, O2- is bonded in a trigonal non-coplanar geometry to one K1+ and three H1+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one B3+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one B3+, and one H1+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to one B3+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one B3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2B4H8O11 by Materials Project

K2B4O11H8 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.83–3.29 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to one H1+ and seven O2- atoms. The K–H bond length is 2.71 Å. There are a spread of K–O bond distances ranging from 2.70–2.98 Å. There are four inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.45–1.51 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 1.37–1.39 Å. In the third B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.46–1.51 Å. In the fourth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.38 Å) and one longer (1.39 Å) B–O bond length. There are eight inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.62 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.73 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 0.99 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two B3+ and two H1+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the fourth O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two K1+ and two B3+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one B3+, and one H1+ atom. In the seventh O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms. In the eighth O2- site, O2- is bonded in a distorted water-like geometry to two equivalent K1+, one B3+, and one H1+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one B3+, and one H1+ atom. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to two K1+ and two B3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one B3+, and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KB6(HO)6 by Materials Project

KB6(H2O3)2H2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four dihydrogen molecules and one KB6(H2O3)2 framework. In the KB6(H2O3)2 framework, K is bonded in a 6-coordinate geometry to six O atoms. There are a spread of K–O bond distances ranging from 2.72–2.99 Å. There are six inequivalent B sites. In the first B site, B is bonded in a single-bond geometry to one B and one O atom. The B–B bond length is 1.63 Å. The B–O bond length is 1.24 Å. In the second B site, B is bonded in a 5-coordinate geometry to five B atoms. There are a spread of B–B bond distances ranging from 1.69–1.86 Å. In the third B site, B is bonded in a distorted bent 120 degrees geometry to two O atoms. There is one shorter (1.29 Å) and one longer (1.41 Å) B–O bond length. In the fourth B site, B is bonded in a distorted single-bond geometry to two equivalent B and one H atom. The B–H bond length is 1.21 Å. In the fifth B site, B is bonded in a bent 120 degrees geometry to one B and two O atoms. There is one shorter (1.35 Å) and one longer (1.45 Å) B–O bond length. In the sixth B site, B is bonded in a bent 120 degrees geometry to two O atoms. There is one shorter (1.28 Å) and one longer (1.55 Å) B–O bond length. There are four inequivalent H sites. In the first H site, H is bonded in a linear geometry to two O atoms. There is one shorter (1.05 Å) and one longer (1.44 Å) H–O bond length. In the second H site, H is bonded in a single-bond geometry to one B atom. In the third H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the fourth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. There are six inequivalent O sites. In the first O site, O is bonded in a water-like geometry to one B and one H atom. In the second O site, O is bonded in a distorted bent 120 degrees geometry to one K, one B, and one H atom. In the third O site, O is bonded in a trigonal non-coplanar geometry to two B and one H atom. In the fourth O site, O is bonded in a distorted single-bond geometry to two equivalent K and one B atom. In the fifth O site, O is bonded in a distorted bent 150 degrees geometry to one K, one B, and one H atom. In the sixth O site, O is bonded in a distorted single-bond geometry to two equivalent K and one B atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KB6(HO)6 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K4B10H4O19 by Materials Project

K4B10H4O19 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to one H1+ and eight O2- atoms. The K–H bond length is 2.91 Å. There are a spread of K–O bond distances ranging from 2.83–3.13 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.75–3.06 Å. There are five inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of B–O bond distances ranging from 1.46–1.52 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.38 Å) and one longer (1.39 Å) B–O bond length. In the third B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.46–1.53 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 1.36–1.42 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 1.36–1.39 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent K1+ and two B3+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and two B3+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to two K1+, one B3+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent K1+ and two B3+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+ and two B3+ atoms. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent K1+ and two B3+ atoms. In the eighth O2- site, O2- is bonded in a water-like geometry to two equivalent B3+ atoms. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+ and two B3+ atoms. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+, one B3+, and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KB5(H2O5)2 by Materials Project

KB5O6(OH)4 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one KB5O6(OH)4 sheet oriented in the (1, 0, 0) direction. K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.80–3.28 Å. There are five inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.37 Å) and one longer (1.41 Å) B–O bond length. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.36 Å) and two longer (1.39 Å) B–O bond length. In the third B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of B–O bond distances ranging from 1.47–1.49 Å. In the fourth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.36 Å) and two longer (1.39 Å) B–O bond length. In the fifth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.37 Å) and one longer (1.40 Å) B–O bond length. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.67 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.57 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+, one B3+, and one H1+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two B3+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the fifth O2- site, O2- is bonded in a water-like geometry to one B3+ and one H1+ atom. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one K1+ and three H1+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent K1+ and two B3+ atoms. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent K1+ and two B3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KB5(H2O3)4 by Materials Project

KB5H8O12 crystallizes in the orthorhombic Aea2 space group. The structure is two-dimensional and consists of two KB5H8O12 sheets oriented in the (0, 1, 0) direction. K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are four shorter (2.78 Å) and two longer (2.97 Å) K–O bond lengths. There are three inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.47 Å) and two longer (1.50 Å) B–O bond length. 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 1.36–1.41 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 1.36–1.40 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.60 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two B3+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one B3+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to three H1+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two B3+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and two B3+ atoms.

36 MATERIALS SCIENCE↗