Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “coordination structure”

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.

At least 1,549 records · Page 86

Materials Data on RbSbS(O2F)2 by Materials Project

RbSbS(O2F)2 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. Rb1+ is bonded in a 11-coordinate geometry to six O2- and five F1- atoms. There are a spread of Rb–O bond distances ranging from 3.00–3.53 Å. There are a spread of Rb–F bond distances ranging from 2.92–3.35 Å. Sb3+ is bonded in a 5-coordinate geometry to three O2- and two F1- atoms. There are a spread of Sb–O bond distances ranging from 2.20–2.70 Å. There is one shorter (1.97 Å) and one longer (1.99 Å) Sb–F bond length. S6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of S–O bond distances ranging from 1.46–1.53 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to two equivalent Rb1+ and one S6+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one Sb3+, and one S6+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Rb1+, one Sb3+, and one S6+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Rb1+, one Sb3+, and one S6+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted single-bond geometry to two equivalent Rb1+ and one Sb3+ atom. In the second F1- site, F1- is bonded in a 1-coordinate geometry to three equivalent Rb1+ and one Sb3+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Pd3(PbS)2 by Materials Project

Pd3(PbS)2 crystallizes in the cubic I2_13 space group. The structure is three-dimensional. Pd is bonded in a 2-coordinate geometry to four equivalent Pb and two equivalent S atoms. There are two shorter (2.89 Å) and two longer (3.14 Å) Pd–Pb bond lengths. Both Pd–S bond lengths are 2.34 Å. Pb is bonded in a 7-coordinate geometry to six equivalent Pd and one S atom. The Pb–S bond length is 3.27 Å. S is bonded in a 3-coordinate geometry to three equivalent Pd and one Pb atom.

36 MATERIALS SCIENCE↗

Materials Data on LiEr2S2O8F3 by Materials Project

LiEr2S2O8F3 crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Li1+ is bonded in a 7-coordinate geometry to four O2- and three F1- atoms. There are two shorter (2.12 Å) and two longer (2.51 Å) Li–O bond lengths. There are one shorter (1.97 Å) and two longer (2.48 Å) Li–F bond lengths. Er3+ is bonded in a 8-coordinate geometry to four O2- and four F1- atoms. There are a spread of Er–O bond distances ranging from 2.22–2.36 Å. There are a spread of Er–F bond distances ranging from 2.25–2.44 Å. S6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of S–O bond distances ranging from 1.47–1.50 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Er3+ and one S6+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Er3+, and one S6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Er3+, and one S6+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Er3+ and one S6+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a 4-coordinate geometry to one Li1+ and three equivalent Er3+ atoms. In the second F1- site, F1- is bonded in a 3-coordinate geometry to one Li1+ and two equivalent Er3+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on SrSeO3 by Materials Project

SrSeO3 is Potassium chlorate-like structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Sr2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.66–3.10 Å. Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.72 Å) and two longer (1.73 Å) Se–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to three equivalent Sr2+ and one Se4+ atom to form a mixture of distorted edge and corner-sharing OSr3Se tetrahedra. In the second O2- site, O2- is bonded in a 2-coordinate geometry to three equivalent Sr2+ and one Se4+ atom.

36 MATERIALS SCIENCE↗

Materials Data on SrTaF7 by Materials Project

SrTaF7 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Sr2+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of Sr–F bond distances ranging from 2.51–2.95 Å. Ta5+ is bonded in a 7-coordinate geometry to seven F1- atoms. There are a spread of Ta–F bond distances ranging from 1.94–2.03 Å. There are five inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Sr2+ and one Ta5+ atom. In the second F1- site, F1- is bonded in a 1-coordinate geometry to one Sr2+ and one Ta5+ atom. In the third F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Sr2+ and one Ta5+ atom. In the fourth F1- site, F1- is bonded in a 1-coordinate geometry to two equivalent Sr2+ and one Ta5+ atom. In the fifth F1- site, F1- is bonded in a 1-coordinate geometry to two equivalent Sr2+ and one Ta5+ atom.

36 MATERIALS SCIENCE↗

Materials Data on KTeHOF4 by Materials Project

KHTeOF4 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. K1+ is bonded in a 5-coordinate geometry to one O2- and seven F1- atoms. The K–O bond length is 2.79 Å. There are a spread of K–F bond distances ranging from 2.62–3.34 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. Te4+ is bonded in a square pyramidal geometry to one O2- and four F1- atoms. The Te–O bond length is 1.93 Å. There are a spread of Te–F bond distances ranging from 2.02–2.10 Å. O2- is bonded in a 1-coordinate geometry to one K1+, one H1+, and one Te4+ atom. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 150 degrees geometry to one K1+ and one Te4+ atom. In the second F1- site, F1- is bonded in a 2-coordinate geometry to two equivalent K1+ and one Te4+ atom. In the third F1- site, F1- is bonded in a 1-coordinate geometry to two equivalent K1+ and one Te4+ atom. In the fourth F1- site, F1- is bonded in a 2-coordinate geometry to two equivalent K1+ and one Te4+ atom.

36 MATERIALS SCIENCE↗

Materials Data on UTe2PbO8 by Materials Project

UPbTe2O8 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. U6+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.87–2.68 Å. Pb2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Pb–O bond distances ranging from 2.34–3.08 Å. There are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 5-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–1.94 Å. In the second Te4+ site, Te4+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–2.31 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one U6+ and two equivalent Pb2+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Pb2+ and one Te4+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one Pb2+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Pb2+ and one Te4+ atom. In the fifth O2- site, O2- is bonded in a trigonal planar geometry to two equivalent U6+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Pb2+ and two Te4+ atoms. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one U6+ and one Te4+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent U6+ and one Te4+ atom.

36 MATERIALS SCIENCE↗

Materials Data on LuPO4 by Materials Project

LuPO4 is Zircon-like structured and crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. Lu3+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.29 Å) and four longer (2.38 Å) Lu–O bond lengths. P5+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All P–O bond lengths are 1.56 Å. O2- is bonded in a 1-coordinate geometry to two equivalent Lu3+ and one P5+ atom.

36 MATERIALS SCIENCE↗

Materials Data on SrGeO3 by Materials Project

SrGeO3 crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.96 Å. Ge4+ is bonded to four O2- atoms to form corner-sharing GeO4 tetrahedra. There is two shorter (1.74 Å) and two longer (1.81 Å) Ge–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Sr2+ and two equivalent Ge4+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent Sr2+ and one Ge4+ atom.

36 MATERIALS SCIENCE↗

Materials Data on NaReO4 by Materials Project

NaReO4 is Zircon-like structured and crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. Na1+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.56 Å) and four longer (2.73 Å) Na–O bond lengths. Re7+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All Re–O bond lengths are 1.76 Å. O2- is bonded in a 1-coordinate geometry to two equivalent Na1+ and one Re7+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Pr3CuSiS7 by Materials Project

Pr3CuSiS7 crystallizes in the hexagonal P6_3 space group. The structure is three-dimensional. Pr3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Pr–S bond distances ranging from 2.86–3.11 Å. Cu1+ is bonded in a trigonal planar geometry to three equivalent S2- atoms. All Cu–S bond lengths are 2.26 Å. Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are one shorter (2.11 Å) and three longer (2.15 Å) Si–S bond lengths. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to three equivalent Pr3+ and one Si4+ atom. In the second S2- site, S2- is bonded in a distorted tetrahedral geometry to three equivalent Pr3+ and one Si4+ atom. In the third S2- site, S2- is bonded in a 5-coordinate geometry to four equivalent Pr3+ and one Cu1+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Sm3CuGeS7 by Materials Project

Sm3CuGeS7 crystallizes in the hexagonal P6_3 space group. The structure is three-dimensional. Sm3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Sm–S bond distances ranging from 2.80–3.25 Å. Cu1+ is bonded in a trigonal planar geometry to three equivalent S2- atoms. All Cu–S bond lengths are 2.26 Å. Ge4+ is bonded in a tetrahedral geometry to four S2- atoms. There are one shorter (2.20 Å) and three longer (2.25 Å) Ge–S bond lengths. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent Sm3+ and one Ge4+ atom. In the second S2- site, S2- is bonded in a distorted tetrahedral geometry to three equivalent Sm3+ and one Ge4+ atom. In the third S2- site, S2- is bonded in a 5-coordinate geometry to four equivalent Sm3+ and one Cu1+ atom.

36 MATERIALS SCIENCE↗

Materials Data on SrDy2O4 by Materials Project

SrDy2O4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.62–2.92 Å. There are two inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing DyO6 octahedra. The corner-sharing octahedra tilt angles range from 51–64°. There are a spread of Dy–O bond distances ranging from 2.22–2.38 Å. In the second Dy3+ site, Dy3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing DyO6 octahedra. The corner-sharing octahedra tilt angles range from 51–64°. There are a spread of Dy–O bond distances ranging from 2.26–2.34 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sr2+ and three equivalent Dy3+ atoms to form a mixture of edge and corner-sharing OSr2Dy3 square pyramids. In the second O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+ and three Dy3+ atoms. In the third O2- site, O2- is bonded to two equivalent Sr2+ and three equivalent Dy3+ atoms to form a mixture of distorted edge and corner-sharing OSr2Dy3 trigonal bipyramids. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+ and three Dy3+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Na2TiSi4O11 by Materials Project

Na2TiSi4O11 crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.38–2.71 Å. Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four equivalent SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 0°. There is one shorter (1.93 Å) and five longer (2.02 Å) Ti–O bond length. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one TiO6 octahedra and corners with three equivalent SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Si4+ atoms. In the second O2- site, O2- is bonded in an octahedral geometry to four equivalent Na1+ and two equivalent Ti4+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two equivalent Ti4+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Na1+, one Ti4+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+ and two equivalent Si4+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Sr2LaTa3O11 by Materials Project

Sr2LaTa3O11 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Sr2+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. There are four shorter (2.51 Å) and two longer (2.59 Å) Sr–O bond lengths. La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with two equivalent LaO12 cuboctahedra, faces with two equivalent LaO12 cuboctahedra, and faces with eight TaO6 octahedra. There are a spread of La–O bond distances ranging from 2.62–2.88 Å. There are two inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with four TaO6 octahedra and faces with two equivalent LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 10–19°. There are a spread of Ta–O bond distances ranging from 1.89–2.14 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TaO6 octahedra and faces with four equivalent LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–10°. There is two shorter (1.99 Å) and four longer (2.00 Å) Ta–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent La3+ and two Ta5+ atoms. In the second O2- site, O2- is bonded to three equivalent Sr2+ and one Ta5+ atom to form a mixture of distorted edge and corner-sharing OSr3Ta tetrahedra. In the third O2- site, O2- is bonded in a distorted linear geometry to two equivalent La3+ and two equivalent Ta5+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one La3+ and two equivalent Ta5+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Na2Si2O5 by Materials Project

Na2Si2O5 crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. Na1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Na–O bond distances ranging from 2.33–2.72 Å. Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.66 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Na1+ and one Si4+ atom. In the second O2- site, O2- is bonded in a linear geometry to two equivalent Si4+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+ and two equivalent Si4+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Rb2Ge4O9 by Materials Project

Rb2Ge4O9 crystallizes in the trigonal P-3c1 space group. The structure is three-dimensional. Rb1+ is bonded in a 7-coordinate geometry to nine O2- atoms. There are a spread of Rb–O bond distances ranging from 2.87–3.44 Å. There are four inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent GeO6 octahedra and corners with two equivalent GeO4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. There is two shorter (1.76 Å) and two longer (1.82 Å) Ge–O bond length. In the second Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent GeO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 46–48°. There are a spread of Ge–O bond distances ranging from 1.75–1.81 Å. In the third Ge4+ site, Ge4+ is bonded to six O2- atoms to form corner-sharing GeO6 octahedra. There is three shorter (1.91 Å) and three longer (1.93 Å) Ge–O bond length. In the fourth Ge4+ site, Ge4+ is bonded to six equivalent O2- atoms to form corner-sharing GeO6 octahedra. All Ge–O bond lengths are 1.95 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Rb1+ and two Ge4+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Rb1+ and two Ge4+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Rb1+ and two equivalent Ge4+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Rb1+ and two Ge4+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Rb1+ and two Ge4+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on GdTaO4 by Materials Project

GdTaO4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Gd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Gd–O bond distances ranging from 2.34–2.51 Å. Ta5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ta–O bond distances ranging from 1.88–2.37 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Gd3+ and two equivalent Ta5+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Gd3+ and one Ta5+ atom.

36 MATERIALS SCIENCE↗