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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.

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At least 1,027 records · Page 57
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DOE OSTI2020

Materials Data on Hf2Ni7 by Materials Project

Hf2Ni7 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Hf is bonded in a 6-coordinate geometry to fourteen Ni atoms. There are a spread of Hf–Ni bond distances ranging from 2.70–2.87 Å. There are three inequivalent Ni sites. In the first Ni site, Ni is bonded to four equivalent Hf and eight Ni atoms to form a mixture of corner, edge, and face-sharing NiHf4Ni8 cuboctahedra. There are four shorter (2.35 Å) and four longer (2.47 Å) Ni–Ni bond lengths. In the second Ni site, Ni is bonded to four equivalent Hf and eight Ni atoms to form a mixture of corner, edge, and face-sharing NiHf4Ni8 cuboctahedra. There are a spread of Ni–Ni bond distances ranging from 2.33–2.48 Å. In the third Ni site, Ni is bonded in a 12-coordinate geometry to four equivalent Hf and eight Ni atoms. There are a spread of Ni–Ni bond distances ranging from 2.40–2.71 Å.

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DOE OSTI2020

Materials Data on Hf2MnRe by Materials Project

Hf2ReMn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2ReMn ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Re and one Mn atom. The Hf–Re bond length is 2.32 Å. The Hf–Mn bond length is 2.60 Å. Re is bonded in a linear geometry to two equivalent Hf atoms. Mn is bonded in a linear geometry to two equivalent Hf atoms.

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Materials Data on Hf2RePd by Materials Project

Hf2RePd is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to four equivalent Re and four equivalent Pd atoms. All Hf–Re bond lengths are 2.86 Å. All Hf–Pd bond lengths are 2.86 Å. Re is bonded in a body-centered cubic geometry to eight equivalent Hf atoms. Pd is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.

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DOE OSTI2020

Materials Data on HfSiW by Materials Project

HfWSi crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Hf is bonded in a 9-coordinate geometry to four equivalent W and five equivalent Si atoms. There are two shorter (2.99 Å) and two longer (3.08 Å) Hf–W bond lengths. There are a spread of Hf–Si bond distances ranging from 2.73–2.91 Å. W is bonded in a 12-coordinate geometry to four equivalent Hf and four equivalent Si atoms. There are a spread of W–Si bond distances ranging from 2.53–2.70 Å. Si is bonded in a 9-coordinate geometry to five equivalent Hf and four equivalent W atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2FeCo by Materials Project

Hf2FeCo crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2FeCo ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Fe and one Co atom. The Hf–Fe bond length is 2.24 Å. The Hf–Co bond length is 2.25 Å. Fe is bonded in a linear geometry to two equivalent Hf atoms. Co is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfNiP by Materials Project

HfNiP crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Hf is bonded in a 5-coordinate geometry to six equivalent Ni and five equivalent P atoms. There are a spread of Hf–Ni bond distances ranging from 2.81–2.93 Å. There are a spread of Hf–P bond distances ranging from 2.66–2.69 Å. Ni is bonded in a 4-coordinate geometry to six equivalent Hf and four equivalent P atoms. There are a spread of Ni–P bond distances ranging from 2.30–2.42 Å. P is bonded in a 9-coordinate geometry to five equivalent Hf and four equivalent Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2MnCo by Materials Project

Hf2MnCo is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to four equivalent Mn and four equivalent Co atoms. All Hf–Mn bond lengths are 2.73 Å. All Hf–Co bond lengths are 2.73 Å. Mn is bonded in a distorted body-centered cubic geometry to eight equivalent Hf atoms. Co is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfCuGeAs by Materials Project

HfCuGeAs is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to four equivalent Ge and four equivalent As atoms. All Hf–Ge bond lengths are 2.85 Å. All Hf–As bond lengths are 2.78 Å. Cu is bonded to four equivalent As atoms to form a mixture of distorted edge and corner-sharing CuAs4 cuboctahedra. All Cu–As bond lengths are 2.53 Å. Ge is bonded in a 8-coordinate geometry to four equivalent Hf and four equivalent Ge atoms. All Ge–Ge bond lengths are 2.64 Å. As is bonded in a 8-coordinate geometry to four equivalent Hf and four equivalent Cu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2NiOs by Materials Project

Hf2OsNi crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2OsNi ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Os and one Ni atom. The Hf–Os bond length is 2.32 Å. The Hf–Ni bond length is 2.37 Å. Os is bonded in a linear geometry to two equivalent Hf atoms. Ni is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2CoOs by Materials Project

Hf2OsCo is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to four equivalent Os and four equivalent Co atoms. All Hf–Os bond lengths are 2.79 Å. All Hf–Co bond lengths are 2.79 Å. Os is bonded in a body-centered cubic geometry to eight equivalent Hf atoms. Co is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.

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DOE OSTI2020

Materials Data on Hf2OsRu by Materials Project

Hf2OsRu crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2OsRu ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Os and one Ru atom. The Hf–Os bond length is 2.31 Å. The Hf–Ru bond length is 2.27 Å. Os is bonded in a linear geometry to two equivalent Hf atoms. Ru is bonded in a linear geometry to two equivalent Hf atoms.

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DOE OSTI2020

Materials Data on Hf2MoPd by Materials Project

Hf2MoPd crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2MoPd ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Mo and one Pd atom. The Hf–Mo bond length is 2.39 Å. The Hf–Pd bond length is 2.53 Å. Mo is bonded in a linear geometry to two equivalent Hf atoms. Pd is bonded in a linear geometry to two equivalent Hf atoms.

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DOE OSTI2020

Materials Data on Hf2TcPd by Materials Project

Hf2TcPd is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to four equivalent Tc and four equivalent Pd atoms. All Hf–Tc bond lengths are 2.85 Å. All Hf–Pd bond lengths are 2.85 Å. Tc is bonded in a body-centered cubic geometry to eight equivalent Hf atoms. Pd is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfMg6FeO8 by Materials Project

Mg6HfFeO8 is alpha Po-derived structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. there are three inequivalent Mg sites. In the first Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent FeO6 octahedra, corners with four equivalent MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.10 Å) and four longer (2.16 Å) Mg–O bond lengths. In the second Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent HfO6 octahedra, corners with four equivalent MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Mg–O bond lengths are 2.16 Å. In the third Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six equivalent MgO6 octahedra, edges with two equivalent HfO6 octahedra, edges with two equivalent FeO6 octahedra, and edges with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Mg–O bond distances ranging from 2.13–2.29 Å. Hf is bonded to six O atoms to form HfO6 octahedra that share corners with two equivalent MgO6 octahedra, corners with four equivalent HfO6 octahedra, edges with four equivalent FeO6 octahedra, and edges with eight equivalent MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are four shorter (2.16 Å) and two longer (2.26 Å) Hf–O bond lengths. Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent MgO6 octahedra, corners with four equivalent FeO6 octahedra, edges with four equivalent HfO6 octahedra, and edges with eight equivalent MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are four shorter (2.16 Å) and two longer (2.32 Å) Fe–O bond lengths. There are six inequivalent O sites. In the first O site, O is bonded to five Mg and one Fe atom to form OMg5Fe octahedra that share corners with six equivalent OMg5Fe octahedra and edges with twelve OHfMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the second O site, O is bonded to five Mg and one Hf atom to form OHfMg5 octahedra that share corners with six equivalent OHfMg5 octahedra and edges with twelve OMg5Fe octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the third O site, O is bonded to two equivalent Mg, two equivalent Hf, and two equivalent Fe atoms to form OHf2Mg2Fe2 octahedra that share corners with six OHf2Mg2Fe2 octahedra and edges with twelve OMg5Fe octahedra. The corner-sharing octahedral tilt angles are 0°. In the fourth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OHf2Mg2Fe2 octahedra and edges with twelve OMg5Fe octahedra. The corner-sharing octahedral tilt angles are 0°. In the fifth O site, O is bonded to two equivalent Mg, two equivalent Hf, and two equivalent Fe atoms to form OHf2Mg2Fe2 octahedra that share corners with six OHf2Mg2Fe2 octahedra and edges with twelve OMg5Fe octahedra. The corner-sharing octahedral tilt angles are 0°. Both O–Mg bond lengths are 2.29 Å. In the sixth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OHf2Mg2Fe2 octahedra and edges with twelve OMg5Fe octahedra. The corner-sharing octahedral tilt angles are 0°. Both O–Mg bond lengths are 2.13 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2ReRu by Materials Project

Hf2ReRu crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2ReRu ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Re and one Ru atom. The Hf–Re bond length is 2.53 Å. The Hf–Ru bond length is 2.30 Å. Re is bonded in a linear geometry to two equivalent Hf atoms. Ru is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2CuNi by Materials Project

Hf2NiCu crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2NiCu ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Ni and one Cu atom. The Hf–Ni bond length is 2.20 Å. The Hf–Cu bond length is 2.59 Å. Ni is bonded in a linear geometry to two equivalent Hf atoms. Cu is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfAlPt2 by Materials Project

HfPt2Al crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hf is bonded in a 11-coordinate geometry to eight equivalent Pt and three equivalent Al atoms. There are two shorter (2.74 Å) and six longer (2.94 Å) Hf–Pt bond lengths. All Hf–Al bond lengths are 2.60 Å. Pt is bonded in a 1-coordinate geometry to four equivalent Hf, four equivalent Pt, and three equivalent Al atoms. There are one shorter (2.75 Å) and three longer (2.94 Å) Pt–Pt bond lengths. All Pt–Al bond lengths are 2.94 Å. Al is bonded in a 9-coordinate geometry to three equivalent Hf and six equivalent Pt atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2CoRu by Materials Project

Hf2RuCo crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2RuCo ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Ru and one Co atom. The Hf–Ru bond length is 2.25 Å. The Hf–Co bond length is 2.20 Å. Ru is bonded in a linear geometry to two equivalent Hf atoms. Co is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗