Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “HF”

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 1,495 records · Page 83
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on LiHfAu2 by Materials Project

LiHfAu2 is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Li is bonded in a body-centered cubic geometry to eight equivalent Au atoms. All Li–Au bond lengths are 2.85 Å. Hf is bonded in a body-centered cubic geometry to eight equivalent Au atoms. All Hf–Au bond lengths are 2.85 Å. Au is bonded in a body-centered cubic geometry to four equivalent Li and four equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfInRu2 by Materials Project

HfRu2In crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfRu2In ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Ru atoms. Both Hf–Ru bond lengths are 2.24 Å. Ru is bonded in a linear geometry to one Hf and one In atom. The Ru–In bond length is 2.67 Å. In is bonded in a linear geometry to two equivalent Ru atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pm3Hf by Materials Project

Pm3Hf is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Pm is bonded to eight equivalent Pm and four equivalent Hf atoms to form PmPm8Hf4 cuboctahedra that share corners with twelve equivalent PmPm8Hf4 cuboctahedra, edges with eight equivalent HfPm12 cuboctahedra, edges with sixteen equivalent PmPm8Hf4 cuboctahedra, faces with four equivalent HfPm12 cuboctahedra, and faces with fourteen equivalent PmPm8Hf4 cuboctahedra. All Pm–Pm bond lengths are 3.52 Å. All Pm–Hf bond lengths are 3.52 Å. Hf is bonded to twelve equivalent Pm atoms to form HfPm12 cuboctahedra that share corners with twelve equivalent HfPm12 cuboctahedra, edges with twenty-four equivalent PmPm8Hf4 cuboctahedra, faces with six equivalent HfPm12 cuboctahedra, and faces with twelve equivalent PmPm8Hf4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfNbRu2 by Materials Project

HfNbRu2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfNbRu2 ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Ru atoms. Both Hf–Ru bond lengths are 2.32 Å. Nb is bonded in a linear geometry to two equivalent Ru atoms. Both Nb–Ru bond lengths are 2.21 Å. Ru is bonded in a linear geometry to one Hf and one Nb atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YHfAu2 by Materials Project

YHfAu2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two YHfAu2 ribbons oriented in the (1, 0, 0) direction. Y is bonded in a linear geometry to two equivalent Au atoms. Both Y–Au bond lengths are 2.75 Å. Hf is bonded in a linear geometry to two equivalent Au atoms. Both Hf–Au bond lengths are 2.67 Å. Au is bonded in a linear geometry to one Y and one Hf atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf3NiSb7 by Materials Project

Hf3NiSb7 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are three inequivalent Hf4+ sites. In the first Hf4+ site, Hf4+ is bonded in a 9-coordinate geometry to nine Sb2- atoms. There are a spread of Hf–Sb bond distances ranging from 2.98–3.16 Å. In the second Hf4+ site, Hf4+ is bonded in a 9-coordinate geometry to nine Sb2- atoms. There are a spread of Hf–Sb bond distances ranging from 2.96–3.40 Å. In the third Hf4+ site, Hf4+ is bonded in a 8-coordinate geometry to eight Sb2- atoms. There are a spread of Hf–Sb bond distances ranging from 2.96–3.15 Å. Ni2+ is bonded to six Sb2- atoms to form distorted edge-sharing NiSb6 octahedra. There are a spread of Ni–Sb bond distances ranging from 2.58–2.74 Å. There are seven inequivalent Sb2- sites. In the first Sb2- site, Sb2- is bonded in a 4-coordinate geometry to four Hf4+ atoms. In the second Sb2- site, Sb2- is bonded in a 4-coordinate geometry to four Hf4+ atoms. In the third Sb2- site, Sb2- is bonded in a 3-coordinate geometry to three Hf4+ and one Ni2+ atom. In the fourth Sb2- site, Sb2- is bonded in a 5-coordinate geometry to three Hf4+ and two equivalent Ni2+ atoms. In the fifth Sb2- site, Sb2- is bonded in a 5-coordinate geometry to three equivalent Hf4+ and two equivalent Ni2+ atoms. In the sixth Sb2- site, Sb2- is bonded in a 5-coordinate geometry to five Hf4+ atoms. In the seventh Sb2- site, Sb2- is bonded in a 5-coordinate geometry to four Hf4+ and one Ni2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfN by Materials Project

HfN is Molybdenum Carbide MAX Phase-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hf is bonded to six equivalent N atoms to form a mixture of distorted corner and edge-sharing HfN6 pentagonal pyramids. All Hf–N bond lengths are 2.27 Å. N is bonded to six equivalent Hf atoms to form a mixture of corner, edge, and face-sharing NHf6 octahedra. The corner-sharing octahedral tilt angles are 47°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfTiNi2 by Materials Project

HfTiNi2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfTiNi2 ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Ni atoms. Both Hf–Ni bond lengths are 2.19 Å. Ti is bonded in a linear geometry to two equivalent Ni atoms. Both Ti–Ni bond lengths are 2.52 Å. Ni is bonded in a linear geometry to one Hf and one Ti atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfBe2Pt by Materials Project

Be2HfPt crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Be2HfPt ribbons oriented in the (1, 0, 0) direction. Be is bonded in a linear geometry to one Hf and one Pt atom. The Be–Hf bond length is 2.53 Å. The Be–Pt bond length is 2.06 Å. Hf is bonded in a linear geometry to two equivalent Be atoms. Pt is bonded in a linear geometry to two equivalent Be atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfInCu2 by Materials Project

HfCu2In is Heusler-like structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to eight equivalent Cu atoms. All Hf–Cu bond lengths are 2.79 Å. Cu is bonded in a distorted body-centered cubic geometry to four equivalent Hf and four equivalent In atoms. All Cu–In bond lengths are 2.81 Å. In is bonded in a distorted body-centered cubic geometry to eight equivalent Cu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfTa by Materials Project

HfTa crystallizes in the orthorhombic Cmmm space group. The structure is two-dimensional and consists of two HfTa sheets oriented in the (0, 1, 0) direction. Hf is bonded in a 8-coordinate geometry to four equivalent Ta atoms. All Hf–Ta bond lengths are 2.97 Å. Ta is bonded in a 8-coordinate geometry to four equivalent Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf3Sb7Pd by Materials Project

Hf3PdSb7 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are three inequivalent Hf4+ sites. In the first Hf4+ site, Hf4+ is bonded in a 9-coordinate geometry to nine Sb2- atoms. There are a spread of Hf–Sb bond distances ranging from 3.00–3.19 Å. In the second Hf4+ site, Hf4+ is bonded in a 9-coordinate geometry to nine Sb2- atoms. There are a spread of Hf–Sb bond distances ranging from 2.97–3.44 Å. In the third Hf4+ site, Hf4+ is bonded in a 8-coordinate geometry to eight Sb2- atoms. There are a spread of Hf–Sb bond distances ranging from 2.98–3.19 Å. Pd2+ is bonded to six Sb2- atoms to form distorted edge-sharing PdSb6 octahedra. There are a spread of Pd–Sb bond distances ranging from 2.68–2.83 Å. There are seven inequivalent Sb2- sites. In the first Sb2- site, Sb2- is bonded in a 4-coordinate geometry to four Hf4+ atoms. In the second Sb2- site, Sb2- is bonded in a 8-coordinate geometry to three Hf4+ and one Pd2+ atom. In the third Sb2- site, Sb2- is bonded in a 5-coordinate geometry to three Hf4+ and two equivalent Pd2+ atoms. In the fourth Sb2- site, Sb2- is bonded in a 5-coordinate geometry to three equivalent Hf4+ and two equivalent Pd2+ atoms. In the fifth Sb2- site, Sb2- is bonded in a 5-coordinate geometry to five Hf4+ atoms. In the sixth Sb2- site, Sb2- is bonded in a 5-coordinate geometry to four Hf4+ and one Pd2+ atom. In the seventh Sb2- site, Sb2- is bonded in a 4-coordinate geometry to four Hf4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfSn2 by Materials Project

HfSn2 is Titanium Disilicide-like structured and crystallizes in the hexagonal P6_222 space group. The structure is three-dimensional. Hf is bonded in a distorted q6 geometry to ten equivalent Sn atoms. There are a spread of Hf–Sn bond distances ranging from 3.02–3.21 Å. Sn is bonded in a 10-coordinate geometry to five equivalent Hf and five equivalent Sn atoms. There are a spread of Sn–Sn bond distances ranging from 3.02–3.22 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfGaCu2 by Materials Project

HfCu2Ga crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfCu2Ga ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Cu atoms. Both Hf–Cu bond lengths are 2.57 Å. Cu is bonded in a linear geometry to one Hf and one Ga atom. The Cu–Ga bond length is 2.44 Å. Ga is bonded in a linear geometry to two equivalent Cu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3Hf by Materials Project

K3Hf is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded to four equivalent K and four equivalent Hf atoms to form a mixture of distorted face, edge, and corner-sharing KK4Hf4 tetrahedra. All K–K bond lengths are 3.98 Å. All K–Hf bond lengths are 3.98 Å. In the second K site, K is bonded in a body-centered cubic geometry to eight equivalent K atoms. Hf is bonded in a body-centered cubic geometry to eight equivalent K atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfTaMn2 by Materials Project

HfTaMn2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfTaMn2 ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Mn atoms. Both Hf–Mn bond lengths are 2.44 Å. Ta is bonded in a linear geometry to two equivalent Mn atoms. Both Ta–Mn bond lengths are 2.33 Å. Mn is bonded in a linear geometry to one Hf and one Ta atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfTiFe2 by Materials Project

HfTiFe2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfTiFe2 ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Fe atoms. Both Hf–Fe bond lengths are 2.27 Å. Ti is bonded in a linear geometry to two equivalent Fe atoms. Both Ti–Fe bond lengths are 2.17 Å. Fe is bonded in a linear geometry to one Hf and one Ti atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfTaRu2 by Materials Project

HfTaRu2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfTaRu2 ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Ru atoms. Both Hf–Ru bond lengths are 2.32 Å. Ta is bonded in a linear geometry to two equivalent Ru atoms. Both Ta–Ru bond lengths are 2.21 Å. Ru is bonded in a linear geometry to one Hf and one Ta atom.

36 MATERIALS SCIENCE↗