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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 1,063 records · Page 59
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DOE OSTI2020

Materials Data on HfFeSi by Materials Project

HfFeSi crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Hf is bonded in a 9-coordinate geometry to four equivalent Fe and five equivalent Si atoms. There are a spread of Hf–Fe bond distances ranging from 2.72–2.80 Å. There are a spread of Hf–Si bond distances ranging from 2.76–2.84 Å. Fe is bonded in a 10-coordinate geometry to four equivalent Hf and four equivalent Si atoms. There are a spread of Fe–Si bond distances ranging from 2.33–2.45 Å. Si is bonded in a 9-coordinate geometry to five equivalent Hf and four equivalent Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf3Ni3Sb4 by Materials Project

Hf3Ni3Sb4 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to four equivalent Ni and eight equivalent Sb atoms. All Hf–Ni bond lengths are 2.78 Å. All Hf–Sb bond lengths are 3.14 Å. Ni is bonded in a 8-coordinate geometry to four equivalent Hf and four equivalent Sb atoms. All Ni–Sb bond lengths are 2.54 Å. Sb is bonded in a 9-coordinate geometry to six equivalent Hf and three equivalent Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce3Hf by Materials Project

Ce3Hf is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ce sites. In the first Ce site, Ce is bonded to eight Ce and four equivalent Hf atoms to form CeCe8Hf4 cuboctahedra that share corners with twelve equivalent CeCe8Hf4 cuboctahedra, edges with eight equivalent HfCe12 cuboctahedra, edges with sixteen CeCe8Hf4 cuboctahedra, faces with four equivalent HfCe12 cuboctahedra, and faces with fourteen CeCe8Hf4 cuboctahedra. All Ce–Ce bond lengths are 3.32 Å. All Ce–Hf bond lengths are 3.32 Å. In the second Ce site, Ce is bonded to eight equivalent Ce and four equivalent Hf atoms to form CeCe8Hf4 cuboctahedra that share corners with four equivalent CeCe8Hf4 cuboctahedra, corners with eight equivalent HfCe12 cuboctahedra, edges with twenty-four CeCe8Hf4 cuboctahedra, faces with six equivalent HfCe12 cuboctahedra, and faces with twelve CeCe8Hf4 cuboctahedra. All Ce–Hf bond lengths are 3.32 Å. Hf is bonded to twelve Ce atoms to form HfCe12 cuboctahedra that share corners with four equivalent HfCe12 cuboctahedra, corners with eight equivalent CeCe8Hf4 cuboctahedra, edges with eight equivalent HfCe12 cuboctahedra, edges with sixteen equivalent CeCe8Hf4 cuboctahedra, faces with four equivalent HfCe12 cuboctahedra, and faces with fourteen CeCe8Hf4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2H2Pd by Materials Project

Hf2PdH2 is alpha bismuth trifluoride-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Hf is bonded in a 8-coordinate geometry to four equivalent Pd and four equivalent H atoms. All Hf–Pd bond lengths are 2.86 Å. All Hf–H bond lengths are 2.08 Å. Pd is bonded in a body-centered cubic geometry to eight equivalent Hf atoms. H is bonded to four equivalent Hf atoms to form a mixture of edge and corner-sharing HHf4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfCoGe by Materials Project

HfCoGe crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Hf is bonded in a 11-coordinate geometry to six equivalent Co and five equivalent Ge atoms. There are a spread of Hf–Co bond distances ranging from 2.76–3.13 Å. There are a spread of Hf–Ge bond distances ranging from 2.77–2.80 Å. Co is bonded in a 12-coordinate geometry to six equivalent Hf and four equivalent Ge atoms. There are a spread of Co–Ge bond distances ranging from 2.41–2.49 Å. Ge is bonded in a 9-coordinate geometry to five equivalent Hf and four equivalent Co atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2BeZn by Materials Project

BeHf2Zn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two BeHf2Zn ribbons oriented in the (1, 0, 0) direction. Be is bonded in a linear geometry to two equivalent Hf atoms. Both Be–Hf bond lengths are 2.52 Å. Hf is bonded in a linear geometry to one Be and one Zn atom. The Hf–Zn bond length is 2.80 Å. Zn is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2FeRh by Materials Project

Hf2FeRh 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 Fe and four equivalent Rh atoms. All Hf–Fe bond lengths are 2.79 Å. All Hf–Rh bond lengths are 2.79 Å. Fe is bonded in a distorted body-centered cubic geometry to eight equivalent Hf atoms. Rh is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfAlW4 by Materials Project

HfW4Al is Hexagonal Laves-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to twelve equivalent W and four equivalent Al atoms. All Hf–W bond lengths are 3.13 Å. All Hf–Al bond lengths are 3.26 Å. W is bonded to three equivalent Hf, six equivalent W, and three equivalent Al atoms to form a mixture of corner, edge, and face-sharing WHf3Al3W6 cuboctahedra. There are three shorter (2.66 Å) and three longer (2.68 Å) W–W bond lengths. All W–Al bond lengths are 3.12 Å. Al is bonded in a 12-coordinate geometry to four equivalent Hf and twelve equivalent W atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2ReHg by Materials Project

Hf2ReHg crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2ReHg ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Re and one Hg atom. The Hf–Re bond length is 2.27 Å. The Hf–Hg bond length is 3.03 Å. Re is bonded in a linear geometry to two equivalent Hf atoms. Hg is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2TcNi by Materials Project

Hf2TcNi crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2TcNi ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Tc and one Ni atom. The Hf–Tc bond length is 2.26 Å. The Hf–Ni bond length is 2.41 Å. Tc 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 Hf2CuRh by Materials Project

Hf2RhCu 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 Rh and four equivalent Cu atoms. All Hf–Rh bond lengths are 2.82 Å. All Hf–Cu bond lengths are 2.82 Å. Rh is bonded in a body-centered cubic geometry to eight equivalent Hf atoms. Cu is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2ReAg by Materials Project

Hf2ReAg crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2ReAg ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Re and one Ag atom. The Hf–Re bond length is 2.29 Å. The Hf–Ag bond length is 2.90 Å. Re is bonded in a linear geometry to two equivalent Hf atoms. Ag is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2TcPd by Materials Project

Hf2TcPd crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2TcPd ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Tc and one Pd atom. The Hf–Tc bond length is 2.26 Å. The Hf–Pd bond length is 2.55 Å. Tc is bonded in a linear geometry to two equivalent Hf atoms. Pd is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2IrOs by Materials Project

Hf2OsIr crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2OsIr ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Os and one Ir atom. The Hf–Os bond length is 2.36 Å. The Hf–Ir bond length is 2.42 Å. Os is bonded in a linear geometry to two equivalent Hf atoms. Ir is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2ZnHg by Materials Project

Hf2HgZn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2HgZn ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Hg and one Zn atom. The Hf–Hg bond length is 2.89 Å. The Hf–Zn bond length is 2.78 Å. Hg is bonded in a linear geometry to two equivalent Hf atoms. Zn is bonded in a linear geometry to two equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfZrW4 by Materials Project

HfZrW4 is Cubic Laves-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to four equivalent Zr and twelve equivalent W atoms. All Hf–Zr bond lengths are 3.31 Å. All Hf–W bond lengths are 3.17 Å. Zr is bonded in a 12-coordinate geometry to four equivalent Hf and twelve equivalent W atoms. All Zr–W bond lengths are 3.17 Å. W is bonded to three equivalent Hf, three equivalent Zr, and six equivalent W atoms to form a mixture of corner, edge, and face-sharing WHf3Zr3W6 cuboctahedra. All W–W bond lengths are 2.71 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfNi2Sb by Materials Project

HfNi2Sb crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hf is bonded in a 8-coordinate geometry to eight equivalent Ni and six equivalent Sb atoms. There are six shorter (2.74 Å) and two longer (2.84 Å) Hf–Ni bond lengths. All Hf–Sb bond lengths are 3.18 Å. Ni is bonded in a 8-coordinate geometry to four equivalent Hf, one Ni, and three equivalent Sb atoms. The Ni–Ni bond length is 2.53 Å. All Ni–Sb bond lengths are 2.55 Å. Sb is bonded to six equivalent Hf and six equivalent Ni atoms to form a mixture of distorted face and corner-sharing SbHf6Ni6 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2Cr3Si by Materials Project

Hf2Cr3Si crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to nine equivalent Cr and three equivalent Si atoms. There are six shorter (2.93 Å) and three longer (2.94 Å) Hf–Cr bond lengths. All Hf–Si bond lengths are 2.93 Å. Cr is bonded to six equivalent Hf, four equivalent Cr, and two equivalent Si atoms to form CrHf6Cr4Si2 cuboctahedra that share corners with four equivalent SiHf6Cr6 cuboctahedra, corners with fourteen equivalent CrHf6Cr4Si2 cuboctahedra, edges with six equivalent CrHf6Cr4Si2 cuboctahedra, faces with six equivalent SiHf6Cr6 cuboctahedra, and faces with twelve equivalent CrHf6Cr4Si2 cuboctahedra. There are two shorter (2.41 Å) and two longer (2.58 Å) Cr–Cr bond lengths. Both Cr–Si bond lengths are 2.55 Å. Si is bonded to six equivalent Hf and six equivalent Cr atoms to form SiHf6Cr6 cuboctahedra that share corners with twelve equivalent CrHf6Cr4Si2 cuboctahedra, edges with six equivalent SiHf6Cr6 cuboctahedra, faces with two equivalent SiHf6Cr6 cuboctahedra, and faces with eighteen equivalent CrHf6Cr4Si2 cuboctahedra.

36 MATERIALS SCIENCE↗