Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Ir”

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 1,351 records · Page 75

Materials Data on Sn4B3Ir7 by Materials Project

Ir7B3Sn4 crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. there are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 2-coordinate geometry to two equivalent B and four Sn atoms. Both Ir–B bond lengths are 2.16 Å. There are a spread of Ir–Sn bond distances ranging from 2.73–2.95 Å. In the second Ir site, Ir is bonded to six equivalent B atoms to form face-sharing IrB6 octahedra. All Ir–B bond lengths are 2.31 Å. B is bonded to six Ir atoms to form a mixture of distorted edge and corner-sharing BIr6 pentagonal pyramids. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 6-coordinate geometry to six equivalent Ir atoms. In the second Sn site, Sn is bonded in a 6-coordinate geometry to six equivalent Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on Ho5(Ge5Ir2)2 by Materials Project

Ho5(Ir2Ge5)2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are three inequivalent Ho sites. In the first Ho site, Ho is bonded in a 8-coordinate geometry to four equivalent Ir and twelve Ge atoms. All Ho–Ir bond lengths are 3.21 Å. There are eight shorter (3.01 Å) and four longer (3.36 Å) Ho–Ge bond lengths. In the second Ho site, Ho is bonded in a 12-coordinate geometry to four equivalent Ir and eight Ge atoms. All Ho–Ir bond lengths are 3.21 Å. There are a spread of Ho–Ge bond distances ranging from 2.94–3.26 Å. In the third Ho site, Ho is bonded in a 4-coordinate geometry to two equivalent Ir and four Ge atoms. Both Ho–Ir bond lengths are 3.16 Å. There are two shorter (2.78 Å) and two longer (2.82 Å) Ho–Ge bond lengths. Ir is bonded in a 9-coordinate geometry to four Ho and five Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.46–2.54 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 2-coordinate geometry to three Ho, two equivalent Ir, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.94 Å. In the second Ge site, Ge is bonded in a 5-coordinate geometry to four Ho and two equivalent Ir atoms. In the third Ge site, Ge is bonded in a 6-coordinate geometry to four Ho and two equivalent Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on K(IrO2)4 by Materials Project

K(IrO2)4 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. K1+ is bonded in a square co-planar geometry to four O2- atoms. There are two shorter (2.64 Å) and two longer (2.65 Å) K–O bond lengths. There are two inequivalent Ir+3.75+ sites. In the first Ir+3.75+ site, Ir+3.75+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing IrO6 octahedra. The corner-sharing octahedral tilt angles are 53°. There are a spread of Ir–O bond distances ranging from 1.97–2.08 Å. In the second Ir+3.75+ site, Ir+3.75+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing IrO6 octahedra. The corner-sharing octahedral tilt angles are 53°. There are a spread of Ir–O bond distances ranging from 1.99–2.07 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to one K1+ and three equivalent Ir+3.75+ atoms to form a mixture of distorted edge and corner-sharing OKIr3 tetrahedra. In the second O2- site, O2- is bonded in a trigonal planar geometry to three Ir+3.75+ atoms. In the third O2- site, O2- is bonded in a trigonal planar geometry to three Ir+3.75+ atoms. In the fourth O2- site, O2- is bonded to one K1+ and three equivalent Ir+3.75+ atoms to form a mixture of distorted edge and corner-sharing OKIr3 tetrahedra.

36 MATERIALS SCIENCE↗

Materials Data on Ga2Ir by Materials Project

IrGa2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 9-coordinate geometry to nine Ga atoms. There are a spread of Ir–Ga bond distances ranging from 2.55–2.75 Å. In the second Ir site, Ir is bonded in a 9-coordinate geometry to nine Ga atoms. There are a spread of Ir–Ga bond distances ranging from 2.48–2.79 Å. There are four inequivalent Ga sites. In the first Ga site, Ga is bonded in a 4-coordinate geometry to four Ir and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.84 Å. In the second Ga site, Ga is bonded in a 4-coordinate geometry to four Ir atoms. In the third Ga site, Ga is bonded in a 2-coordinate geometry to six Ir and one Ga atom. The Ga–Ga bond length is 2.54 Å. In the fourth Ga site, Ga is bonded in a 1-coordinate geometry to five Ir and five Ga atoms.

36 MATERIALS SCIENCE↗

Materials Data on Y(SiIr)2 by Materials Project

YIr2Si2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Y is bonded in a 8-coordinate geometry to eight Ir and eight Si atoms. There are four shorter (3.15 Å) and four longer (3.26 Å) Y–Ir bond lengths. There are four shorter (3.17 Å) and four longer (3.18 Å) Y–Si bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 9-coordinate geometry to four equivalent Y and five Si atoms. There are one shorter (2.37 Å) and four longer (2.43 Å) Ir–Si bond lengths. In the second Ir site, Ir is bonded to four equivalent Y and four equivalent Si atoms to form distorted IrY4Si4 tetrahedra that share corners with twelve equivalent SiY4Ir4 tetrahedra, edges with two equivalent SiY4Ir4 tetrahedra, edges with four equivalent IrY4Si4 tetrahedra, and faces with four equivalent IrY4Si4 tetrahedra. All Ir–Si bond lengths are 2.44 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded to four equivalent Y and four equivalent Ir atoms to form distorted SiY4Ir4 tetrahedra that share corners with twelve equivalent IrY4Si4 tetrahedra, edges with two equivalent IrY4Si4 tetrahedra, edges with four equivalent SiY4Ir4 tetrahedra, and faces with four equivalent SiY4Ir4 tetrahedra. In the second Si site, Si is bonded in a 9-coordinate geometry to four equivalent Y and five Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on Pu(SiIr)2 by Materials Project

Pu(IrSi)2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Pu is bonded in a 8-coordinate geometry to eight Ir and eight Si atoms. There are four shorter (3.13 Å) and four longer (3.24 Å) Pu–Ir bond lengths. There are four shorter (3.14 Å) and four longer (3.18 Å) Pu–Si bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 9-coordinate geometry to four equivalent Pu and five Si atoms. There are one shorter (2.37 Å) and four longer (2.42 Å) Ir–Si bond lengths. In the second Ir site, Ir is bonded to four equivalent Pu and four equivalent Si atoms to form distorted IrPu4Si4 tetrahedra that share corners with twelve equivalent SiPu4Ir4 tetrahedra, edges with two equivalent SiPu4Ir4 tetrahedra, edges with four equivalent IrPu4Si4 tetrahedra, and faces with four equivalent IrPu4Si4 tetrahedra. All Ir–Si bond lengths are 2.43 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to four equivalent Pu and five Ir atoms. In the second Si site, Si is bonded to four equivalent Pu and four equivalent Ir atoms to form distorted SiPu4Ir4 tetrahedra that share corners with twelve equivalent IrPu4Si4 tetrahedra, edges with two equivalent IrPu4Si4 tetrahedra, edges with four equivalent SiPu4Ir4 tetrahedra, and faces with four equivalent SiPu4Ir4 tetrahedra.

36 MATERIALS SCIENCE↗

Materials Data on Ce(GeIr)2 by Materials Project

CeIr2Ge2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Ce is bonded in a 12-coordinate geometry to eight Ir and eight Ge atoms. There are four shorter (3.24 Å) and four longer (3.38 Å) Ce–Ir bond lengths. There are four shorter (3.27 Å) and four longer (3.28 Å) Ce–Ge bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 4-coordinate geometry to four equivalent Ce and four equivalent Ge atoms. All Ir–Ge bond lengths are 2.52 Å. In the second Ir site, Ir is bonded in a 9-coordinate geometry to four equivalent Ce and five Ge atoms. There are one shorter (2.45 Å) and four longer (2.50 Å) Ir–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to four equivalent Ce and five Ir atoms. In the second Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent Ce and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on Eu2(Ga3Ir)3 by Materials Project

Eu2(IrGa3)3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Eu is bonded in a 11-coordinate geometry to eleven Ga atoms. There are a spread of Eu–Ga bond distances ranging from 3.09–3.17 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 8-coordinate geometry to eight Ga atoms. There are two shorter (2.63 Å) and six longer (2.64 Å) Ir–Ga bond lengths. In the second Ir site, Ir is bonded in a 8-coordinate geometry to eight Ga atoms. There are a spread of Ir–Ga bond distances ranging from 2.61–2.65 Å. There are four inequivalent Ga sites. In the first Ga site, Ga is bonded in a 3-coordinate geometry to two equivalent Eu, three Ir, and five Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.78–2.89 Å. In the second Ga site, Ga is bonded in a 3-coordinate geometry to three equivalent Eu, three Ir, and five Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.80–2.97 Å. In the third Ga site, Ga is bonded in a 10-coordinate geometry to two equivalent Eu, two equivalent Ir, and six Ga atoms. Both Ga–Ga bond lengths are 2.75 Å. In the fourth Ga site, Ga is bonded in a 10-coordinate geometry to two equivalent Eu, two equivalent Ir, and six Ga atoms. The Ga–Ga bond length is 2.73 Å.

36 MATERIALS SCIENCE↗

Materials Data on NdIr5 by Materials Project

NdIr5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Nd is bonded in a 6-coordinate geometry to eighteen Ir atoms. There are six shorter (3.09 Å) and twelve longer (3.44 Å) Nd–Ir bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded to four equivalent Nd and eight Ir atoms to form a mixture of edge, face, and corner-sharing IrNd4Ir8 cuboctahedra. There are four shorter (2.66 Å) and four longer (2.68 Å) Ir–Ir bond lengths. In the second Ir site, Ir is bonded in a 12-coordinate geometry to three equivalent Nd and six equivalent Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on Ho5(Ge5Ir2)2 by Materials Project

Ho5(Ir2Ge5)2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are three inequivalent Ho sites. In the first Ho site, Ho is bonded in a 8-coordinate geometry to four equivalent Ir and twelve Ge atoms. All Ho–Ir bond lengths are 3.23 Å. There are eight shorter (2.97 Å) and four longer (3.36 Å) Ho–Ge bond lengths. In the second Ho site, Ho is bonded to four equivalent Ir and eight Ge atoms to form distorted face-sharing HoGe8Ir4 cuboctahedra. All Ho–Ir bond lengths are 3.13 Å. There are a spread of Ho–Ge bond distances ranging from 2.91–3.10 Å. In the third Ho site, Ho is bonded in a 12-coordinate geometry to four equivalent Ir and ten Ge atoms. All Ho–Ir bond lengths are 3.31 Å. There are a spread of Ho–Ge bond distances ranging from 3.27–3.38 Å. Ir is bonded in a 10-coordinate geometry to five Ho and five Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.46–2.59 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to six Ho, two equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.47 Å. In the second Ge site, Ge is bonded in a 2-coordinate geometry to five Ho, two equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.52 Å. In the third Ge site, Ge is bonded in a 2-coordinate geometry to four Ho, two equivalent Ir, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.88 Å.

36 MATERIALS SCIENCE↗

Materials Data on Rb3Ir by Materials Project

Rb3Ir is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are three inequivalent Rb sites. In the first Rb site, Rb is bonded to four Rb and four Ir atoms to form a mixture of distorted edge, face, and corner-sharing RbRb4Ir4 tetrahedra. All Rb–Rb bond lengths are 3.61 Å. All Rb–Ir bond lengths are 3.61 Å. In the second Rb site, Rb is bonded in a 12-coordinate geometry to eight equivalent Rb and six Ir atoms. There are four shorter (4.13 Å) and two longer (4.24 Å) Rb–Ir bond lengths. In the third Rb site, Rb is bonded in a 12-coordinate geometry to eight equivalent Rb and six Ir atoms. There are four shorter (4.13 Å) and two longer (4.24 Å) Rb–Ir bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a distorted body-centered cubic geometry to fourteen Rb atoms. In the second Ir site, Ir is bonded in a distorted body-centered cubic geometry to fourteen Rb atoms.

36 MATERIALS SCIENCE↗

Materials Data on Sc6Al16Ir7 by Materials Project

Sc6Ir7Al16 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Sc is bonded in a 12-coordinate geometry to four equivalent Ir and eight Al atoms. All Sc–Ir bond lengths are 3.14 Å. There are four shorter (2.93 Å) and four longer (3.01 Å) Sc–Al bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded to four equivalent Sc and eight Al atoms to form a mixture of distorted face and corner-sharing IrSc4Al8 cuboctahedra. There are four shorter (2.53 Å) and four longer (2.72 Å) Ir–Al bond lengths. In the second Ir site, Ir is bonded in a body-centered cubic geometry to eight equivalent Al atoms. All Ir–Al bond lengths are 2.57 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 4-coordinate geometry to three equivalent Sc and four Ir atoms. In the second Al site, Al is bonded in a 3-coordinate geometry to three equivalent Sc and three equivalent Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on Sm(GeIr)2 by Materials Project

Sm(IrGe)2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Sm is bonded in a 12-coordinate geometry to eight Ir and eight Ge atoms. There are four shorter (3.23 Å) and four longer (3.37 Å) Sm–Ir bond lengths. All Sm–Ge bond lengths are 3.27 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 4-coordinate geometry to four equivalent Sm and four equivalent Ge atoms. All Ir–Ge bond lengths are 2.51 Å. In the second Ir site, Ir is bonded in a 9-coordinate geometry to four equivalent Sm and five Ge atoms. There are one shorter (2.44 Å) and four longer (2.50 Å) Ir–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent Sm and four equivalent Ir atoms. In the second Ge site, Ge is bonded in a 9-coordinate geometry to four equivalent Sm and five Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on Sm(PIr)2 by Materials Project

SmIr2P2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Sm is bonded in a 8-coordinate geometry to eight Ir and eight P atoms. There are four shorter (3.19 Å) and four longer (3.24 Å) Sm–Ir bond lengths. There are four shorter (3.12 Å) and four longer (3.15 Å) Sm–P bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded to four equivalent Sm and four equivalent P atoms to form a mixture of distorted edge and face-sharing IrSm4P4 cuboctahedra. All Ir–P bond lengths are 2.48 Å. In the second Ir site, Ir is bonded in a 9-coordinate geometry to four equivalent Sm and five P atoms. There are four shorter (2.35 Å) and one longer (2.37 Å) Ir–P bond lengths. There are two inequivalent P sites. In the first P site, P is bonded in a 8-coordinate geometry to four equivalent Sm and four equivalent Ir atoms. In the second P site, P is bonded in a 9-coordinate geometry to four equivalent Sm and five Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on Yb2(Ga3Ir)3 by Materials Project

Yb2(IrGa3)3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Yb is bonded in a 11-coordinate geometry to eleven Ga atoms. There are a spread of Yb–Ga bond distances ranging from 3.05–3.13 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 8-coordinate geometry to eight Ga atoms. There are a spread of Ir–Ga bond distances ranging from 2.56–2.63 Å. In the second Ir site, Ir is bonded in a 8-coordinate geometry to eight Ga atoms. There are four shorter (2.60 Å) and four longer (2.62 Å) Ir–Ga bond lengths. There are four inequivalent Ga sites. In the first Ga site, Ga is bonded in a 10-coordinate geometry to two equivalent Yb, two equivalent Ir, and six Ga atoms. There are two shorter (2.76 Å) and four longer (2.78 Å) Ga–Ga bond lengths. In the second Ga site, Ga is bonded in a 3-coordinate geometry to three equivalent Yb, three Ir, and five Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.79–2.92 Å. In the third Ga site, Ga is bonded in a 10-coordinate geometry to two equivalent Yb, three Ir, and five Ga atoms. There are one shorter (2.76 Å) and two longer (2.86 Å) Ga–Ga bond lengths. In the fourth Ga site, Ga is bonded in a 10-coordinate geometry to two equivalent Yb, two equivalent Ir, and six Ga atoms. The Ga–Ga bond length is 2.74 Å.

36 MATERIALS SCIENCE↗

Materials Data on FeIr3 by Materials Project

FeIr3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Fe is bonded to twelve Ir atoms to form FeIr12 cuboctahedra that share corners with four equivalent FeIr12 cuboctahedra, corners with eight equivalent IrFe4Ir8 cuboctahedra, edges with eight equivalent FeIr12 cuboctahedra, edges with sixteen equivalent IrFe4Ir8 cuboctahedra, faces with four equivalent FeIr12 cuboctahedra, and faces with fourteen IrFe4Ir8 cuboctahedra. All Fe–Ir bond lengths are 2.69 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded to four equivalent Fe and eight Ir atoms to form IrFe4Ir8 cuboctahedra that share corners with twelve equivalent IrFe4Ir8 cuboctahedra, edges with eight equivalent FeIr12 cuboctahedra, edges with sixteen IrFe4Ir8 cuboctahedra, faces with four equivalent FeIr12 cuboctahedra, and faces with fourteen IrFe4Ir8 cuboctahedra. All Ir–Ir bond lengths are 2.69 Å. In the second Ir site, Ir is bonded to four equivalent Fe and eight equivalent Ir atoms to form IrFe4Ir8 cuboctahedra that share corners with four equivalent IrFe4Ir8 cuboctahedra, corners with eight equivalent FeIr12 cuboctahedra, edges with twenty-four IrFe4Ir8 cuboctahedra, faces with six equivalent FeIr12 cuboctahedra, and faces with twelve IrFe4Ir8 cuboctahedra.

36 MATERIALS SCIENCE↗

Materials Data on Ce2(Ga3Ir)3 by Materials Project

Ce2(IrGa3)3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Ce is bonded in a 11-coordinate geometry to eleven Ga atoms. There are a spread of Ce–Ga bond distances ranging from 3.05–3.21 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 8-coordinate geometry to eight Ga atoms. There are a spread of Ir–Ga bond distances ranging from 2.58–2.69 Å. In the second Ir site, Ir is bonded in a 8-coordinate geometry to eight Ga atoms. There are a spread of Ir–Ga bond distances ranging from 2.57–2.67 Å. There are four inequivalent Ga sites. In the first Ga site, Ga is bonded in a 10-coordinate geometry to two equivalent Ce, two equivalent Ir, and six Ga atoms. There are four shorter (2.76 Å) and two longer (2.77 Å) Ga–Ga bond lengths. In the second Ga site, Ga is bonded in a 3-coordinate geometry to three equivalent Ce, three Ir, and three Ga atoms. There are one shorter (2.80 Å) and one longer (2.90 Å) Ga–Ga bond lengths. In the third Ga site, Ga is bonded in a 10-coordinate geometry to two equivalent Ce, three Ir, and five Ga atoms. There are two shorter (2.82 Å) and one longer (2.84 Å) Ga–Ga bond lengths. In the fourth Ga site, Ga is bonded in a 10-coordinate geometry to two equivalent Ce, two equivalent Ir, and six Ga atoms. The Ga–Ga bond length is 2.73 Å.

36 MATERIALS SCIENCE↗

Materials Data on Y5(Ge5Ir2)2 by Materials Project

Y5(Ir2Ge5)2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are three inequivalent Y sites. In the first Y site, Y is bonded in a 8-coordinate geometry to four equivalent Ir and twelve Ge atoms. All Y–Ir bond lengths are 3.22 Å. There are eight shorter (2.99 Å) and four longer (3.36 Å) Y–Ge bond lengths. In the second Y site, Y is bonded to four equivalent Ir and eight Ge atoms to form face-sharing YGe8Ir4 cuboctahedra. All Y–Ir bond lengths are 3.13 Å. There are a spread of Y–Ge bond distances ranging from 2.95–3.08 Å. In the third Y site, Y is bonded in a 8-coordinate geometry to four equivalent Ir and ten Ge atoms. All Y–Ir bond lengths are 3.34 Å. There are a spread of Y–Ge bond distances ranging from 3.29–3.38 Å. Ir is bonded in a 10-coordinate geometry to five Y and five Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.47–2.57 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to six Y, two equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.45 Å. In the second Ge site, Ge is bonded in a 2-coordinate geometry to five Y, two equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.53 Å. In the third Ge site, Ge is bonded in a 2-coordinate geometry to four Y, two equivalent Ir, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.90 Å.

36 MATERIALS SCIENCE↗