SEARCH · Engineering Papers
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.
CeIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Ce is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Ce–Ir bond lengths are 3.16 Å. Ir is bonded to six equivalent Ce and six equivalent Ir atoms to form a mixture of edge, corner, and face-sharing IrCe6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.70 Å.
Eu2IrGa3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to three equivalent Ir and nine Ga atoms. There are two shorter (3.31 Å) and one longer (3.32 Å) Eu–Ir bond lengths. There are three shorter (3.13 Å) and six longer (3.34 Å) Eu–Ga bond lengths. Ir is bonded to six equivalent Eu and six Ga atoms to form IrEu6Ga6 cuboctahedra that share corners with twelve GaEu6Ga4Ir2 cuboctahedra, edges with six equivalent IrEu6Ga6 cuboctahedra, faces with two equivalent IrEu6Ga6 cuboctahedra, and faces with eighteen GaEu6Ga4Ir2 cuboctahedra. There are four shorter (2.69 Å) and two longer (2.70 Å) Ir–Ga bond lengths. There are two inequivalent Ga sites. In the first Ga site, Ga is bonded to six equivalent Eu, two equivalent Ir, and four equivalent Ga atoms to form distorted GaEu6Ga4Ir2 cuboctahedra that share corners with four equivalent IrEu6Ga6 cuboctahedra, corners with fourteen GaEu6Ga4Ir2 cuboctahedra, edges with six equivalent GaEu6Ga4Ir2 cuboctahedra, faces with six equivalent IrEu6Ga6 cuboctahedra, and faces with twelve equivalent GaEu6Ga4Ir2 cuboctahedra. There are two shorter (2.73 Å) and two longer (2.96 Å) Ga–Ga bond lengths. In the second Ga site, Ga is bonded to six equivalent Eu, two equivalent Ir, and four Ga atoms to form distorted GaEu6Ga4Ir2 cuboctahedra that share corners with four equivalent IrEu6Ga6 cuboctahedra, corners with fourteen GaEu6Ga4Ir2 cuboctahedra, edges with six equivalent GaEu6Ga4Ir2 cuboctahedra, faces with six equivalent IrEu6Ga6 cuboctahedra, and faces with twelve GaEu6Ga4Ir2 cuboctahedra. There are one shorter (2.71 Å) and one longer (2.98 Å) Ga–Ga bond lengths.
EuIrGe2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to four equivalent Ir and ten Ge atoms. All Eu–Ir bond lengths are 3.36 Å. There are a spread of Eu–Ge bond distances ranging from 3.28–3.42 Å. Ir is bonded in a 9-coordinate geometry to four equivalent Eu and five Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.43–2.54 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 1-coordinate geometry to six equivalent Eu, one Ir, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.59 Å. In the second Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent Eu and four equivalent Ir atoms.
ZrIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Zr is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Zr–Ir bond lengths are 3.08 Å. Ir is bonded to six equivalent Zr and six equivalent Ir atoms to form a mixture of edge, face, and corner-sharing IrZr6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.63 Å.
MnIr3 is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Mn is bonded to twelve equivalent Ir atoms to form MnIr12 cuboctahedra that share corners with six equivalent MnIr12 cuboctahedra, corners with twelve equivalent IrMn4Ir8 cuboctahedra, edges with eighteen equivalent IrMn4Ir8 cuboctahedra, faces with eight equivalent MnIr12 cuboctahedra, and faces with twelve equivalent IrMn4Ir8 cuboctahedra. There are six shorter (2.67 Å) and six longer (2.73 Å) Mn–Ir bond lengths. Ir is bonded to four equivalent Mn and eight equivalent Ir atoms to form distorted IrMn4Ir8 cuboctahedra that share corners with four equivalent MnIr12 cuboctahedra, corners with fourteen equivalent IrMn4Ir8 cuboctahedra, edges with six equivalent MnIr12 cuboctahedra, edges with twelve equivalent IrMn4Ir8 cuboctahedra, faces with four equivalent MnIr12 cuboctahedra, and faces with sixteen equivalent IrMn4Ir8 cuboctahedra. There are six shorter (2.69 Å) and two longer (2.76 Å) Ir–Ir bond lengths.
Ir3V is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. V is bonded to twelve equivalent Ir atoms to form VIr12 cuboctahedra that share corners with six equivalent VIr12 cuboctahedra, corners with twelve equivalent IrV4Ir8 cuboctahedra, edges with eighteen equivalent IrV4Ir8 cuboctahedra, faces with eight equivalent VIr12 cuboctahedra, and faces with twelve equivalent IrV4Ir8 cuboctahedra. There are six shorter (2.69 Å) and six longer (2.73 Å) V–Ir bond lengths. Ir is bonded to four equivalent V and eight equivalent Ir atoms to form distorted IrV4Ir8 cuboctahedra that share corners with four equivalent VIr12 cuboctahedra, corners with fourteen equivalent IrV4Ir8 cuboctahedra, edges with six equivalent VIr12 cuboctahedra, edges with twelve equivalent IrV4Ir8 cuboctahedra, faces with four equivalent VIr12 cuboctahedra, and faces with sixteen equivalent IrV4Ir8 cuboctahedra. There are a spread of Ir–Ir bond distances ranging from 2.69–2.75 Å.
TcIr3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Tc is bonded to twelve equivalent Ir atoms to form TcIr12 cuboctahedra that share corners with six equivalent TcIr12 cuboctahedra, corners with twelve equivalent IrTc4Ir8 cuboctahedra, edges with eighteen equivalent IrTc4Ir8 cuboctahedra, faces with eight equivalent TcIr12 cuboctahedra, and faces with twelve equivalent IrTc4Ir8 cuboctahedra. There are six shorter (2.71 Å) and six longer (2.76 Å) Tc–Ir bond lengths. Ir is bonded to four equivalent Tc and eight equivalent Ir atoms to form distorted IrTc4Ir8 cuboctahedra that share corners with four equivalent TcIr12 cuboctahedra, corners with fourteen equivalent IrTc4Ir8 cuboctahedra, edges with six equivalent TcIr12 cuboctahedra, edges with twelve equivalent IrTc4Ir8 cuboctahedra, faces with four equivalent TcIr12 cuboctahedra, and faces with sixteen equivalent IrTc4Ir8 cuboctahedra. There are a spread of Ir–Ir bond distances ranging from 2.71–2.77 Å.
ReIr3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Re is bonded to twelve equivalent Ir atoms to form ReIr12 cuboctahedra that share corners with six equivalent ReIr12 cuboctahedra, corners with twelve equivalent IrRe4Ir8 cuboctahedra, edges with eighteen equivalent IrRe4Ir8 cuboctahedra, faces with eight equivalent ReIr12 cuboctahedra, and faces with twelve equivalent IrRe4Ir8 cuboctahedra. There are six shorter (2.71 Å) and six longer (2.77 Å) Re–Ir bond lengths. Ir is bonded to four equivalent Re and eight equivalent Ir atoms to form distorted IrRe4Ir8 cuboctahedra that share corners with four equivalent ReIr12 cuboctahedra, corners with fourteen equivalent IrRe4Ir8 cuboctahedra, edges with six equivalent ReIr12 cuboctahedra, edges with twelve equivalent IrRe4Ir8 cuboctahedra, faces with four equivalent ReIr12 cuboctahedra, and faces with sixteen equivalent IrRe4Ir8 cuboctahedra. There are a spread of Ir–Ir bond distances ranging from 2.72–2.78 Å.
NdIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Nd is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Nd–Ir bond lengths are 3.19 Å. Ir is bonded to six equivalent Nd and six equivalent Ir atoms to form a mixture of edge, face, and corner-sharing IrNd6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.72 Å.
HoIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Ho is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Ho–Ir bond lengths are 3.14 Å. Ir is bonded to six equivalent Ho and six equivalent Ir atoms to form a mixture of corner, edge, and face-sharing IrHo6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.68 Å.
PrIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Pr is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Pr–Ir bond lengths are 3.20 Å. Ir is bonded to six equivalent Pr and six equivalent Ir atoms to form a mixture of face, edge, and corner-sharing IrPr6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.73 Å.
RuIr is Magnesium-derived structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Ru is bonded to six equivalent Ru and six equivalent Ir atoms to form RuIr6Ru6 cuboctahedra that share corners with eighteen equivalent RuIr6Ru6 cuboctahedra, edges with six equivalent RuIr6Ru6 cuboctahedra, edges with twelve equivalent IrIr6Ru6 cuboctahedra, faces with eight equivalent RuIr6Ru6 cuboctahedra, and faces with twelve equivalent IrIr6Ru6 cuboctahedra. All Ru–Ru bond lengths are 2.75 Å. All Ru–Ir bond lengths are 2.70 Å. Ir is bonded to six equivalent Ru and six equivalent Ir atoms to form IrIr6Ru6 cuboctahedra that share corners with eighteen equivalent IrIr6Ru6 cuboctahedra, edges with six equivalent IrIr6Ru6 cuboctahedra, edges with twelve equivalent RuIr6Ru6 cuboctahedra, faces with eight equivalent IrIr6Ru6 cuboctahedra, and faces with twelve equivalent RuIr6Ru6 cuboctahedra. All Ir–Ir bond lengths are 2.75 Å.
CsIr is High Pressure Cadmuum Telluride structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Cs is bonded to four equivalent Cs and eight equivalent Ir atoms to form CsCs4Ir8 cuboctahedra that share corners with twelve equivalent CsCs4Ir8 cuboctahedra, edges with eight equivalent CsCs4Ir8 cuboctahedra, edges with sixteen equivalent IrCs8Ir4 cuboctahedra, faces with eight equivalent IrCs8Ir4 cuboctahedra, and faces with ten equivalent CsCs4Ir8 cuboctahedra. All Cs–Cs bond lengths are 3.18 Å. All Cs–Ir bond lengths are 3.60 Å. Ir is bonded to eight equivalent Cs and four equivalent Ir atoms to form IrCs8Ir4 cuboctahedra that share corners with twelve equivalent IrCs8Ir4 cuboctahedra, edges with eight equivalent IrCs8Ir4 cuboctahedra, edges with sixteen equivalent CsCs4Ir8 cuboctahedra, faces with eight equivalent CsCs4Ir8 cuboctahedra, and faces with ten equivalent IrCs8Ir4 cuboctahedra. All Ir–Ir bond lengths are 3.18 Å.
EuIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Eu–Ir bond lengths are 3.18 Å. Ir is bonded to six equivalent Eu and six equivalent Ir atoms to form a mixture of face, edge, and corner-sharing IrEu6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.71 Å.
IrO3 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Ir is bonded to six O atoms to form corner-sharing IrO6 octahedra. The corner-sharing octahedra tilt angles range from 2–41°. There are a spread of Ir–O bond distances ranging from 1.88–1.97 Å. There are four inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two equivalent Ir atoms. In the second O site, O is bonded in a bent 150 degrees geometry to two equivalent Ir atoms. In the third O site, O is bonded in a bent 150 degrees geometry to two equivalent Ir atoms. In the fourth O site, O is bonded in a linear geometry to two equivalent Ir atoms.
DyIrSi3 crystallizes in the tetragonal I4mm space group. The structure is three-dimensional. Dy is bonded in a 8-coordinate geometry to five equivalent Ir and twelve Si atoms. There are four shorter (3.34 Å) and one longer (3.38 Å) Dy–Ir bond lengths. There are a spread of Dy–Si bond distances ranging from 3.06–3.39 Å. Ir is bonded in a 5-coordinate geometry to five equivalent Dy and five Si atoms. There are one shorter (2.34 Å) and four longer (2.37 Å) Ir–Si bond lengths. There are two inequivalent Si sites. In the first Si site, Si is bonded in a distorted single-bond geometry to four equivalent Dy, one Ir, and four equivalent Si atoms. All Si–Si bond lengths are 2.57 Å. In the second Si site, Si is bonded in a distorted bent 120 degrees geometry to four equivalent Dy, two equivalent Ir, and two equivalent Si atoms.
IrMo is Magnesium-derived structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Mo is bonded to six equivalent Mo and six equivalent Ir atoms to form MoMo6Ir6 cuboctahedra that share corners with eighteen equivalent MoMo6Ir6 cuboctahedra, edges with six equivalent MoMo6Ir6 cuboctahedra, edges with twelve equivalent IrMo6Ir6 cuboctahedra, faces with eight equivalent MoMo6Ir6 cuboctahedra, and faces with twelve equivalent IrMo6Ir6 cuboctahedra. All Mo–Mo bond lengths are 2.79 Å. All Mo–Ir bond lengths are 2.76 Å. Ir is bonded to six equivalent Mo and six equivalent Ir atoms to form IrMo6Ir6 cuboctahedra that share corners with eighteen equivalent IrMo6Ir6 cuboctahedra, edges with six equivalent IrMo6Ir6 cuboctahedra, edges with twelve equivalent MoMo6Ir6 cuboctahedra, faces with eight equivalent IrMo6Ir6 cuboctahedra, and faces with twelve equivalent MoMo6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.79 Å.
Fe3IrSi4 crystallizes in the trigonal R3 space group. The structure is three-dimensional. Fe is bonded in a 9-coordinate geometry to two equivalent Ir and seven Si atoms. There are one shorter (2.79 Å) and one longer (2.80 Å) Fe–Ir bond lengths. There are a spread of Fe–Si bond distances ranging from 2.29–2.60 Å. Ir is bonded in a 4-coordinate geometry to six equivalent Fe and seven Si atoms. There are four shorter (2.40 Å) and three longer (2.59 Å) Ir–Si bond lengths. There are two inequivalent Si sites. In the first Si site, Si is bonded in a 7-coordinate geometry to six equivalent Fe and one Ir atom. In the second Si site, Si is bonded in a 7-coordinate geometry to five equivalent Fe and two equivalent Ir atoms.