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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on KRbO by Materials Project

RbKO is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is two-dimensional and consists of one RbKO sheet oriented in the (0, 0, 1) direction. Rb1+ is bonded to four equivalent O2- atoms to form a mixture of edge and corner-sharing RbO4 tetrahedra. All Rb–O bond lengths are 2.86 Å. K1+ is bonded in a single-bond geometry to one O2- atom. The K–O bond length is 2.45 Å. O2- is bonded in a 5-coordinate geometry to four equivalent Rb1+ and one K1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KRbO3 by Materials Project

RbKO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Rb is bonded to twelve equivalent O atoms to form RbO12 cuboctahedra that share corners with twelve equivalent RbO12 cuboctahedra, faces with six equivalent RbO12 cuboctahedra, and faces with eight equivalent KO6 octahedra. All Rb–O bond lengths are 3.54 Å. K is bonded to six equivalent O atoms to form KO6 octahedra that share corners with six equivalent KO6 octahedra and faces with eight equivalent RbO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All K–O bond lengths are 2.50 Å. O is bonded in a linear geometry to four equivalent Rb and two equivalent K atoms.

36 MATERIALS SCIENCE↗