Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Ca-O-Re”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

5 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ca11(ReO6)4 by Materials Project

Ca11Re4O24 crystallizes in the tetragonal I4_1 space group. The structure is three-dimensional. there are seven inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded to six O2- atoms to form distorted CaO6 octahedra that share corners with two equivalent ReO6 octahedra and edges with two equivalent ReO6 octahedra. The corner-sharing octahedral tilt angles are 73°. There are a spread of Ca–O bond distances ranging from 2.37–2.43 Å. In the second Ca2+ site, Ca2+ is bonded to six O2- atoms to form distorted CaO6 octahedra that share corners with two equivalent ReO6 octahedra and edges with two equivalent ReO6 octahedra. The corner-sharing octahedral tilt angles are 69°. There are a spread of Ca–O bond distances ranging from 2.37–2.44 Å. In the third Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.72 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ca–O bond distances ranging from 2.24–2.53 Å. In the fifth Ca2+ site, Ca2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ca–O bond distances ranging from 2.25–2.55 Å. In the sixth Ca2+ site, Ca2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ca–O bond distances ranging from 2.43–3.03 Å. In the seventh Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.39–2.61 Å. There are two inequivalent Re+6.50+ sites. In the first Re+6.50+ site, Re+6.50+ is bonded to six O2- atoms to form ReO6 octahedra that share edges with two CaO6 octahedra. There are a spread of Re–O bond distances ranging from 1.90–1.94 Å. In the second Re+6.50+ site, Re+6.50+ is bonded to six O2- atoms to form ReO6 octahedra that share corners with two CaO6 octahedra. The corner-sharing octahedra tilt angles range from 69–73°. There are a spread of Re–O bond distances ranging from 1.86–2.05 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Re+6.50+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Re+6.50+ atom. In the third O2- site, O2- is bonded to three Ca2+ and one Re+6.50+ atom to form distorted corner-sharing OCa3Re trigonal pyramids. In the fourth O2- site, O2- is bonded to three Ca2+ and one Re+6.50+ atom to form a mixture of distorted corner and edge-sharing OCa3Re tetrahedra. In the fifth O2- site, O2- is bonded to three Ca2+ and one Re+6.50+ atom to form a mixture of distorted corner and edge-sharing OCa3Re trigonal pyramids. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Re+6.50+ atom. In the seventh O2- site, O2- is bonded in a rectangular see-saw-like geometry to three Ca2+ and one Re+6.50+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Re+6.50+ atom. In the ninth O2- site, O2- is bonded in a distorted see-saw-like geometry to three Ca2+ and one Re+6.50+ atom. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to four Ca2+ and one Re+6.50+ atom. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to four Ca2+ and one Re+6.50+ atom. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to four Ca2+ and one Re+6.50+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca5(ReO6)2 by Materials Project

Ca5Re2O12 crystallizes in the trigonal R-3c space group. The structure is three-dimensional. there are four inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.75 Å. In the second Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.57 Å. In the third Ca2+ site, Ca2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ca–O bond distances ranging from 2.41–2.67 Å. In the fourth Ca2+ site, Ca2+ is bonded to six equivalent O2- atoms to form distorted CaO6 pentagonal pyramids that share edges with three equivalent ReO6 octahedra. All Ca–O bond lengths are 2.33 Å. There are three inequivalent Re7+ sites. In the first Re7+ site, Re7+ is bonded in an octahedral geometry to six O2- atoms. There is three shorter (1.86 Å) and three longer (1.95 Å) Re–O bond length. In the second Re7+ site, Re7+ is bonded to six O2- atoms to form ReO6 octahedra that share an edgeedge with one CaO6 pentagonal pyramid. There are a spread of Re–O bond distances ranging from 1.84–1.98 Å. In the third Re7+ site, Re7+ is bonded in an octahedral geometry to six equivalent O2- atoms. All Re–O bond lengths are 1.91 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to four Ca2+ and one Re7+ atom to form distorted OCa4Re trigonal bipyramids that share corners with two equivalent OCa3Re tetrahedra, corners with two equivalent OCa4Re trigonal bipyramids, edges with two equivalent OCa3Re tetrahedra, and edges with three equivalent OCa4Re trigonal bipyramids. In the second O2- site, O2- is bonded in a 5-coordinate geometry to four Ca2+ and one Re7+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Re7+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Re7+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Re7+ atom. In the sixth O2- site, O2- is bonded to three Ca2+ and one Re7+ atom to form distorted OCa3Re tetrahedra that share corners with three equivalent OCa3Re tetrahedra, corners with two equivalent OCa4Re trigonal bipyramids, an edgeedge with one OCa3Re tetrahedra, and edges with two equivalent OCa4Re trigonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca3ReO6 by Materials Project

Ca3ReO6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.99 Å. In the second Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six equivalent ReO6 octahedra. The corner-sharing octahedra tilt angles range from 33–39°. There are a spread of Ca–O bond distances ranging from 2.28–2.34 Å. Re6+ is bonded to six O2- atoms to form ReO6 octahedra that share corners with six equivalent CaO6 octahedra. The corner-sharing octahedra tilt angles range from 33–39°. There is two shorter (1.94 Å) and four longer (1.95 Å) Re–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to three Ca2+ and one Re6+ atom to form distorted corner-sharing OCa3Re tetrahedra. In the second O2- site, O2- is bonded in a 4-coordinate geometry to four Ca2+ and one Re6+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four Ca2+ and one Re6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca(ReO5)2 by Materials Project

Ca(ReO5)2 crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are two inequivalent Ca sites. In the first Ca site, Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.60 Å. In the second Ca site, Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.75 Å. There are four inequivalent Re sites. In the first Re site, Re is bonded in a tetrahedral geometry to four O atoms. There is one shorter (1.73 Å) and three longer (1.76 Å) Re–O bond length. In the second Re site, Re is bonded in a tetrahedral geometry to four O atoms. There is one shorter (1.73 Å) and three longer (1.76 Å) Re–O bond length. In the third Re site, Re is bonded in a tetrahedral geometry to four O atoms. There are a spread of Re–O bond distances ranging from 1.73–1.81 Å. In the fourth Re site, Re is bonded in a tetrahedral geometry to four O atoms. There are a spread of Re–O bond distances ranging from 1.73–1.81 Å. There are twenty inequivalent O sites. In the first O site, O is bonded in a linear geometry to one Ca and one Re atom. In the second O site, O is bonded in a distorted linear geometry to one Ca and one Re atom. In the third O site, O is bonded in a distorted single-bond geometry to one Ca and one Re atom. In the fourth O site, O is bonded in a water-like geometry to two Ca atoms. In the fifth O site, O is bonded in a single-bond geometry to one Re atom. In the sixth O site, O is bonded in a distorted bent 150 degrees geometry to one Ca and one Re atom. In the seventh O site, O is bonded in a single-bond geometry to one Ca atom. In the eighth O site, O is bonded in a single-bond geometry to one Re atom. In the ninth O site, O is bonded in a single-bond geometry to one Re atom. In the tenth O site, O is bonded in a distorted bent 150 degrees geometry to one Ca and one Re atom. In the eleventh O site, O is bonded in a linear geometry to one Ca and one Re atom. In the twelfth O site, O is bonded in a distorted bent 150 degrees geometry to one Ca and one Re atom. In the thirteenth O site, O is bonded in a single-bond geometry to one Re atom. In the fourteenth O site, O is bonded in a linear geometry to one Ca and one Re atom. In the fifteenth O site, O is bonded in a distorted bent 150 degrees geometry to one Ca and one Re atom. In the sixteenth O site, O is bonded in a single-bond geometry to one Re atom. In the seventeenth O site, O is bonded in a single-bond geometry to one Re atom. In the eighteenth O site, O is bonded in a bent 150 degrees geometry to one Ca and one Re atom. In the nineteenth O site, O is bonded in a single-bond geometry to one Ca atom. In the twentieth O site, O is bonded in a water-like geometry to two Ca atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca(ReO5)2 by Materials Project

Ca(ReO5)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.66 Å. There are two inequivalent Re sites. In the first Re site, Re is bonded in a tetrahedral geometry to four O atoms. There are a spread of Re–O bond distances ranging from 1.73–1.81 Å. In the second Re site, Re is bonded in a tetrahedral geometry to four O atoms. There is one shorter (1.73 Å) and three longer (1.76 Å) Re–O bond length. There are ten inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Re atom. In the second O site, O is bonded in a bent 120 degrees geometry to two equivalent Ca atoms. In the third O site, O is bonded in a distorted bent 150 degrees geometry to one Ca and one Re atom. In the fourth O site, O is bonded in a distorted bent 150 degrees geometry to one Ca and one Re atom. In the fifth O site, O is bonded in a linear geometry to one Ca and one Re atom. In the sixth O site, O is bonded in a linear geometry to one Ca and one Re atom. In the seventh O site, O is bonded in a single-bond geometry to one Re atom. In the eighth O site, O is bonded in a single-bond geometry to one Re atom. In the ninth O site, O is bonded in a single-bond geometry to one Ca atom. In the tenth O site, O is bonded in a bent 150 degrees geometry to one Ca and one Re atom.

36 MATERIALS SCIENCE↗