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23 records · Page 2
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on KNO3 by Materials Project

KNO3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. K1+ is bonded to eight O2- atoms to form a mixture of distorted corner and edge-sharing KO8 hexagonal bipyramids. There are a spread of K–O bond distances ranging from 2.78–2.95 Å. N5+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of N–O bond distances ranging from 1.26–1.28 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent K1+ and one N5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+ and one N5+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent K1+ and one N5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K8N3O by Materials Project

K8N3O is Fluorite-derived structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. K1+ is bonded to three equivalent N2- and one O2- atom to form a mixture of edge and corner-sharing KN3O tetrahedra. All K–N bond lengths are 2.94 Å. The K–O bond length is 2.84 Å. N2- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. O2- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KNO2 by Materials Project

KNO2 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. There are a spread of K–O bond distances ranging from 2.82–2.92 Å. N3+ is bonded in a bent 120 degrees geometry to two equivalent O2- atoms. Both N–O bond lengths are 1.28 Å. O2- is bonded to three equivalent K1+ and one N3+ atom to form a mixture of distorted edge and corner-sharing OK3N tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K4N2O5 by Materials Project

K4N2O5 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to six O2- atoms to form distorted KO6 octahedra that share corners with four equivalent KO7 hexagonal pyramids, corners with two equivalent KO6 octahedra, and faces with four equivalent KO7 hexagonal pyramids. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.57 Å) and four longer (3.04 Å) K–O bond lengths. In the second K1+ site, K1+ is bonded in a linear geometry to two equivalent O2- atoms. Both K–O bond lengths are 2.69 Å. In the third K1+ site, K1+ is bonded to seven O2- atoms to form distorted KO7 hexagonal pyramids that share a cornercorner with one KO7 hexagonal pyramid, corners with two equivalent KO6 octahedra, edges with six equivalent KO7 hexagonal pyramids, and faces with two equivalent KO6 octahedra. The corner-sharing octahedral tilt angles are 10°. There are a spread of K–O bond distances ranging from 2.64–3.03 Å. N3+ is bonded in a bent 120 degrees geometry to two equivalent O2- atoms. Both N–O bond lengths are 1.28 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to six K1+ atoms to form corner-sharing OK6 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four K1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K4NO by Materials Project

K4NO is Fluorite-derived structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. K1+ is bonded to two equivalent N2- and two equivalent O2- atoms to form a mixture of edge and corner-sharing KN2O2 tetrahedra. Both K–N bond lengths are 2.92 Å. Both K–O bond lengths are 2.84 Å. N2- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. O2- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms.

36 MATERIALS SCIENCE↗