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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on CaAgO2 by Materials Project

CaAgO2 crystallizes in the orthorhombic Cmme space group. The structure is three-dimensional. Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six equivalent CaO6 octahedra, edges with four equivalent CaO6 octahedra, and edges with eight equivalent AgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–23°. There are two shorter (2.35 Å) and four longer (2.45 Å) Ca–O bond lengths. Ag2+ is bonded to six O2- atoms to form AgO6 octahedra that share corners with six equivalent AgO6 octahedra, edges with four equivalent AgO6 octahedra, and edges with eight equivalent CaO6 octahedra. The corner-sharing octahedra tilt angles range from 0–16°. There are a spread of Ag–O bond distances ranging from 2.15–2.80 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent Ca2+ and four equivalent Ag2+ atoms. In the second O2- site, O2- is bonded to four equivalent Ca2+ and two equivalent Ag2+ atoms to form a mixture of edge and corner-sharing OCa4Ag2 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CaAgO2 by Materials Project

CaAgO2 is Caswellsilverite-like structured and crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six equivalent CaO6 octahedra, edges with four equivalent CaO6 octahedra, and edges with eight AgO6 octahedra. The corner-sharing octahedral tilt angles are 13°. There are four shorter (2.40 Å) and two longer (2.43 Å) Ca–O bond lengths. There are two inequivalent Ag2+ sites. In the first Ag2+ site, Ag2+ is bonded to six O2- atoms to form AgO6 octahedra that share corners with six equivalent AgO6 octahedra, edges with four AgO6 octahedra, and edges with eight equivalent CaO6 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. There are four shorter (2.19 Å) and two longer (2.67 Å) Ag–O bond lengths. In the second Ag2+ site, Ag2+ is bonded to six O2- atoms to form AgO6 octahedra that share corners with six equivalent AgO6 octahedra, edges with four AgO6 octahedra, and edges with eight equivalent CaO6 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. There are two shorter (2.15 Å) and four longer (2.59 Å) Ag–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Ca2+ and two Ag2+ atoms to form a mixture of distorted edge and corner-sharing OCa4Ag2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second O2- site, O2- is bonded to two equivalent Ca2+ and four Ag2+ atoms to form distorted OCa2Ag4 octahedra that share corners with six equivalent OCa2Ag4 octahedra and edges with twelve OCa4Ag2 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CaAgO2 by Materials Project

CaAgO2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six equivalent CaO6 octahedra, edges with four equivalent CaO6 octahedra, and edges with eight equivalent AgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.36 Å) and four longer (2.39 Å) Ca–O bond lengths. Ag2+ is bonded to six O2- atoms to form AgO6 octahedra that share corners with six equivalent AgO6 octahedra, edges with four equivalent AgO6 octahedra, and edges with eight equivalent CaO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.36 Å) and four longer (2.39 Å) Ag–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Ca2+ and four equivalent Ag2+ atoms to form a mixture of corner and edge-sharing OCa2Ag4 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second O2- site, O2- is bonded to four equivalent Ca2+ and two equivalent Ag2+ atoms to form OCa4Ag2 octahedra that share corners with six equivalent OCa4Ag2 octahedra and edges with twelve OCa2Ag4 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗