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At least 523 records · Page 29
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DOE OSTI2020

Materials Data on Hf2(NiP)3 by Materials Project

Hf2(NiP)3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 6-coordinate geometry to five Ni and six P atoms. There are a spread of Hf–Ni bond distances ranging from 2.74–3.02 Å. There are a spread of Hf–P bond distances ranging from 2.59–2.72 Å. In the second Hf site, Hf is bonded in a 6-coordinate geometry to nine Ni and six P atoms. There are a spread of Hf–Ni bond distances ranging from 2.90–3.24 Å. There are a spread of Hf–P bond distances ranging from 2.71–2.84 Å. There are three inequivalent Ni sites. In the first Ni site, Ni is bonded to five Hf and four P atoms to form distorted NiHf5P4 tetrahedra that share corners with eight equivalent PHf5Ni2 pentagonal bipyramids, edges with two equivalent PHf5Ni2 pentagonal bipyramids, and faces with four equivalent NiHf5P4 tetrahedra. There are a spread of Ni–P bond distances ranging from 2.25–2.32 Å. In the second Ni site, Ni is bonded in a 4-coordinate geometry to four Hf and four P atoms. There are a spread of Ni–P bond distances ranging from 2.19–2.26 Å. In the third Ni site, Ni is bonded in a 4-coordinate geometry to five Hf and four P atoms. There are a spread of Ni–P bond distances ranging from 2.25–2.34 Å. There are three inequivalent P sites. In the first P site, P is bonded in a 9-coordinate geometry to three Hf and six Ni atoms. In the second P site, P is bonded in a 8-coordinate geometry to four Hf and four Ni atoms. In the third P site, P is bonded to five Hf and two Ni atoms to form distorted PHf5Ni2 pentagonal bipyramids that share corners with eight equivalent NiHf5P4 tetrahedra, edges with four equivalent PHf5Ni2 pentagonal bipyramids, and edges with two equivalent NiHf5P4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf10(AlSi)3 by Materials Project

Hf10(AlSi)3 crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. there are three inequivalent Hf sites. In the first Hf site, Hf is bonded in a 6-coordinate geometry to three equivalent Al and three equivalent Si atoms. All Hf–Al bond lengths are 2.84 Å. All Hf–Si bond lengths are 2.83 Å. In the second Hf site, Hf is bonded in a 5-coordinate geometry to three equivalent Al and two equivalent Si atoms. There are two shorter (2.74 Å) and one longer (2.89 Å) Hf–Al bond lengths. Both Hf–Si bond lengths are 3.03 Å. In the third Hf site, Hf is bonded in a 5-coordinate geometry to two equivalent Al and three equivalent Si atoms. Both Hf–Al bond lengths are 3.04 Å. There are two shorter (2.73 Å) and one longer (2.91 Å) Hf–Si bond lengths. Al is bonded in a 9-coordinate geometry to nine Hf atoms. Si is bonded in a 9-coordinate geometry to nine Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfMnGa2 by Materials Project

HfMnGa2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 12-coordinate geometry to four Mn and eight Ga atoms. There are a spread of Hf–Mn bond distances ranging from 3.01–3.13 Å. There are a spread of Hf–Ga bond distances ranging from 2.79–3.03 Å. In the second Hf site, Hf is bonded in a 7-coordinate geometry to seven Ga atoms. There are a spread of Hf–Ga bond distances ranging from 2.78–2.97 Å. There are two inequivalent Mn sites. In the first Mn site, Mn is bonded in a 12-coordinate geometry to three equivalent Hf and six Ga atoms. There are a spread of Mn–Ga bond distances ranging from 2.44–2.69 Å. In the second Mn site, Mn is bonded in a 12-coordinate geometry to two equivalent Hf and six Ga atoms. There are a spread of Mn–Ga bond distances ranging from 2.48–2.65 Å. There are five inequivalent Ga sites. In the first Ga site, Ga is bonded in a 2-coordinate geometry to five Hf, two equivalent Mn, and four Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.58–2.96 Å. In the second Ga site, Ga is bonded in a 2-coordinate geometry to five Hf, two equivalent Mn, and four Ga atoms. There are one shorter (2.83 Å) and two longer (2.94 Å) Ga–Ga bond lengths. In the third Ga site, Ga is bonded in a 7-coordinate geometry to three Hf, four Mn, and one Ga atom. In the fourth Ga site, Ga is bonded in a 12-coordinate geometry to four Hf, four Mn, and one Ga atom. In the fifth Ga site, Ga is bonded in a 6-coordinate geometry to three Hf, three Mn, and two Ga atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf5Ir3 by Materials Project

Hf5Ir3 crystallizes in the hexagonal P6_122 space group. The structure is three-dimensional. there are four inequivalent Hf sites. In the first Hf site, Hf is bonded in a 4-coordinate geometry to four Ir atoms. There are a spread of Hf–Ir bond distances ranging from 2.71–2.97 Å. In the second Hf site, Hf is bonded in a 6-coordinate geometry to six Ir atoms. There are a spread of Hf–Ir bond distances ranging from 2.78–2.96 Å. In the third Hf site, Hf is bonded in a 6-coordinate geometry to six Ir atoms. There are a spread of Hf–Ir bond distances ranging from 2.71–2.97 Å. In the fourth Hf site, Hf is bonded in a 5-coordinate geometry to five Ir atoms. There are a spread of Hf–Ir bond distances ranging from 2.73–2.93 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 9-coordinate geometry to nine Hf atoms. In the second Ir site, Ir is bonded in a 8-coordinate geometry to eight Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf6CCl14 by Materials Project

Hf6CCl14 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded to one C and five Cl atoms to form a mixture of edge and corner-sharing HfCCl5 octahedra. The corner-sharing octahedra tilt angles range from 0–46°. The Hf–C bond length is 2.28 Å. There are a spread of Hf–Cl bond distances ranging from 2.49–2.66 Å. In the second Hf site, Hf is bonded to one C and five Cl atoms to form a mixture of distorted edge and corner-sharing HfCCl5 octahedra. The corner-sharing octahedra tilt angles range from 0–46°. The Hf–C bond length is 2.20 Å. There are a spread of Hf–Cl bond distances ranging from 2.49–3.04 Å. C is bonded in an octahedral geometry to six Hf atoms. There are five inequivalent Cl sites. In the first Cl site, Cl is bonded in an L-shaped geometry to two Hf atoms. In the second Cl site, Cl is bonded in a distorted bent 150 degrees geometry to two equivalent Hf atoms. In the third Cl site, Cl is bonded in an L-shaped geometry to two equivalent Hf atoms. In the fourth Cl site, Cl is bonded in a 3-coordinate geometry to three Hf atoms. In the fifth Cl site, Cl is bonded in an L-shaped geometry to two Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrHf2Mo by Materials Project

SrHf2Mo crystallizes in the cubic F-43m space group. The structure is three-dimensional. Sr is bonded in a distorted body-centered cubic geometry to four equivalent Hf and four equivalent Mo atoms. All Sr–Hf bond lengths are 3.11 Å. All Sr–Mo bond lengths are 3.11 Å. There are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 4-coordinate geometry to four equivalent Sr, four equivalent Hf, and six equivalent Mo atoms. All Hf–Hf bond lengths are 3.11 Å. All Hf–Mo bond lengths are 3.59 Å. In the second Hf site, Hf is bonded to four equivalent Hf and four equivalent Mo atoms to form distorted edge-sharing HfHf4Mo4 tetrahedra. All Hf–Mo bond lengths are 3.11 Å. Mo is bonded in a distorted body-centered cubic geometry to four equivalent Sr and ten Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf3(MnGa3)2 by Materials Project

Hf3(MnGa3)2 crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 11-coordinate geometry to two equivalent Mn and nine Ga atoms. Both Hf–Mn bond lengths are 3.01 Å. There are a spread of Hf–Ga bond distances ranging from 2.83–3.04 Å. In the second Hf site, Hf is bonded in a 7-coordinate geometry to four equivalent Mn and seven Ga atoms. All Hf–Mn bond lengths are 3.08 Å. There are a spread of Hf–Ga bond distances ranging from 2.72–2.97 Å. Mn is bonded to four Hf, two equivalent Mn, and six Ga atoms to form a mixture of distorted corner, edge, and face-sharing MnHf4Mn2Ga6 cuboctahedra. Both Mn–Mn bond lengths are 2.71 Å. There are a spread of Mn–Ga bond distances ranging from 2.52–2.78 Å. There are four inequivalent Ga sites. In the first Ga site, Ga is bonded in a 12-coordinate geometry to four Hf and four equivalent Mn atoms. In the second Ga site, Ga is bonded in a 1-coordinate geometry to three Hf, four equivalent Mn, and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.83 Å. In the third Ga site, Ga is bonded in a 10-coordinate geometry to five Hf and five Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.59–2.83 Å. In the fourth Ga site, Ga is bonded in a 9-coordinate geometry to four Hf, two equivalent Mn, and two equivalent Ga atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf6PbO18 by Materials Project

Hf6PbO18 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded to six O atoms to form HfO6 octahedra that share corners with six HfO6 octahedra and a faceface with one PbO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–10°. There are a spread of Hf–O bond distances ranging from 2.04–2.11 Å. In the second Hf site, Hf is bonded to six O atoms to form HfO6 octahedra that share corners with six HfO6 octahedra and faces with two equivalent PbO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 6–8°. There are two shorter (2.07 Å) and four longer (2.08 Å) Hf–O bond lengths. Pb is bonded to twelve O atoms to form PbO12 cuboctahedra that share faces with eight HfO6 octahedra. There are a spread of Pb–O bond distances ranging from 2.78–2.83 Å. There are seven inequivalent O sites. In the first O site, O is bonded in a linear geometry to two equivalent Hf atoms. In the second O site, O is bonded in a linear geometry to two Hf and one Pb atom. In the third O site, O is bonded in a distorted linear geometry to two equivalent Hf and one Pb atom. In the fourth O site, O is bonded in a linear geometry to two equivalent Hf and one Pb atom. In the fifth O site, O is bonded in a linear geometry to two equivalent Hf atoms. In the sixth O site, O is bonded in a linear geometry to two equivalent Hf atoms. In the seventh O site, O is bonded in a linear geometry to two Hf and one Pb atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf4Al3 by Materials Project

Hf4Al3 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 8-coordinate geometry to eight Hf and six equivalent Al atoms. There are a spread of Hf–Hf bond distances ranging from 2.61–3.36 Å. All Hf–Al bond lengths are 3.02 Å. In the second Hf site, Hf is bonded in a 6-coordinate geometry to nine Hf and six equivalent Al atoms. All Hf–Hf bond lengths are 3.09 Å. All Hf–Al bond lengths are 3.12 Å. Al is bonded to eight Hf and four equivalent Al atoms to form a mixture of edge, corner, and face-sharing AlHf8Al4 cuboctahedra. All Al–Al bond lengths are 2.68 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf3In4 by Materials Project

Hf3In4 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 10-coordinate geometry to six Hf and four equivalent In atoms. There are four shorter (3.09 Å) and two longer (3.12 Å) Hf–Hf bond lengths. All Hf–In bond lengths are 3.07 Å. In the second Hf site, Hf is bonded to four Hf and eight equivalent In atoms to form a mixture of distorted corner, edge, and face-sharing HfHf4In8 cuboctahedra. Both Hf–Hf bond lengths are 3.12 Å. All Hf–In bond lengths are 3.13 Å. In is bonded in a 10-coordinate geometry to five Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf3(CrGa3)2 by Materials Project

Hf3(CrGa3)2 crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 11-coordinate geometry to two equivalent Cr and nine Ga atoms. Both Hf–Cr bond lengths are 2.99 Å. There are a spread of Hf–Ga bond distances ranging from 2.81–3.02 Å. In the second Hf site, Hf is bonded in a 7-coordinate geometry to four equivalent Cr and seven Ga atoms. All Hf–Cr bond lengths are 3.05 Å. There are a spread of Hf–Ga bond distances ranging from 2.69–2.91 Å. Cr is bonded to four Hf, two equivalent Cr, and six Ga atoms to form a mixture of distorted face, edge, and corner-sharing CrHf4Cr2Ga6 cuboctahedra. Both Cr–Cr bond lengths are 2.66 Å. There are a spread of Cr–Ga bond distances ranging from 2.51–2.76 Å. There are four inequivalent Ga sites. In the first Ga site, Ga is bonded in a 5-coordinate geometry to four Hf, two equivalent Cr, and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.62 Å. In the second Ga site, Ga is bonded in a 1-coordinate geometry to three Hf, four equivalent Cr, and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.83 Å. In the third Ga site, Ga is bonded in a 12-coordinate geometry to four Hf and four equivalent Cr atoms. In the fourth Ga site, Ga is bonded in a 10-coordinate geometry to five Hf and five Ga atoms. There are one shorter (2.55 Å) and one longer (2.77 Å) Ga–Ga bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2Mn by Materials Project

Hf2Mn crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 6-coordinate geometry to six equivalent Hf and six equivalent Mn atoms. All Hf–Hf bond lengths are 3.08 Å. All Hf–Mn bond lengths are 2.61 Å. In the second Hf site, Hf is bonded in a 2-coordinate geometry to ten Hf and four equivalent Mn atoms. There are four shorter (3.17 Å) and four longer (3.21 Å) Hf–Hf bond lengths. There are two shorter (2.81 Å) and two longer (3.07 Å) Hf–Mn bond lengths. Mn is bonded in a 12-coordinate geometry to nine Hf and three equivalent Mn atoms. All Mn–Mn bond lengths are 2.89 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf5Sc5Ge6 by Materials Project

Sc5Hf5Ge6 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are two inequivalent Sc sites. In the first Sc site, Sc is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Sc–Ge bond distances ranging from 2.72–3.06 Å. In the second Sc site, Sc is bonded in a 6-coordinate geometry to six Ge atoms. There are three shorter (2.83 Å) and three longer (2.84 Å) Sc–Ge bond lengths. There are three inequivalent Hf sites. In the first Hf site, Hf is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Hf–Ge bond distances ranging from 2.72–3.06 Å. In the second Hf site, Hf is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Hf–Ge bond distances ranging from 2.72–3.06 Å. In the third Hf site, Hf is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Hf–Ge bond distances ranging from 2.72–3.06 Å. There are four inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to four equivalent Sc and five Hf atoms. In the second Ge site, Ge is bonded in a 9-coordinate geometry to six Sc and three Hf atoms. In the third Ge site, Ge is bonded in a 9-coordinate geometry to five Sc and four Hf atoms. In the fourth Ge site, Ge is bonded in a 9-coordinate geometry to five Sc and four Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf4NiRh by Materials Project

Hf4RhNi crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Hf sites. In the first Hf site, Hf is bonded in a 6-coordinate geometry to three equivalent Rh and three equivalent Ni atoms. All Hf–Rh bond lengths are 2.91 Å. All Hf–Ni bond lengths are 2.61 Å. In the second Hf site, Hf is bonded in a 2-coordinate geometry to two equivalent Rh atoms. Both Hf–Rh bond lengths are 2.86 Å. In the third Hf site, Hf is bonded in a 2-coordinate geometry to two equivalent Rh and two equivalent Ni atoms. Both Hf–Rh bond lengths are 3.04 Å. Both Hf–Ni bond lengths are 2.57 Å. Rh is bonded in a 12-coordinate geometry to nine Hf atoms. Ni is bonded in a 6-coordinate geometry to six Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf10SiMo3 by Materials Project

Hf10Mo3Si crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are three inequivalent Hf sites. In the first Hf site, Hf is bonded in a 2-coordinate geometry to three equivalent Mo and one Si atom. There are one shorter (2.90 Å) and two longer (3.18 Å) Hf–Mo bond lengths. The Hf–Si bond length is 2.69 Å. In the second Hf site, Hf is bonded in a 3-coordinate geometry to two equivalent Mo and one Si atom. Both Hf–Mo bond lengths are 2.87 Å. The Hf–Si bond length is 3.09 Å. In the third Hf site, Hf is bonded in a 6-coordinate geometry to six equivalent Mo atoms. All Hf–Mo bond lengths are 2.79 Å. Mo is bonded in a 12-coordinate geometry to ten Hf and two equivalent Mo atoms. Both Mo–Mo bond lengths are 2.98 Å. Si is bonded in a 9-coordinate geometry to nine Hf atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf3(VGa3)2 by Materials Project

Hf3(VGa3)2 crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 11-coordinate geometry to two equivalent V and nine Ga atoms. Both Hf–V bond lengths are 3.02 Å. There are a spread of Hf–Ga bond distances ranging from 2.84–3.02 Å. In the second Hf site, Hf is bonded in a 7-coordinate geometry to four equivalent V and seven Ga atoms. All Hf–V bond lengths are 3.09 Å. There are a spread of Hf–Ga bond distances ranging from 2.74–2.94 Å. V is bonded to four Hf, two equivalent V, and six Ga atoms to form a mixture of distorted edge, face, and corner-sharing VHf4V2Ga6 cuboctahedra. Both V–V bond lengths are 2.69 Å. There are a spread of V–Ga bond distances ranging from 2.56–2.79 Å. There are four inequivalent Ga sites. In the first Ga site, Ga is bonded in a 8-coordinate geometry to four Hf, two equivalent V, and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.63 Å. In the second Ga site, Ga is bonded in a 1-coordinate geometry to three Hf, four equivalent V, and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.85 Å. In the third Ga site, Ga is bonded in a 12-coordinate geometry to four Hf and four equivalent V atoms. In the fourth Ga site, Ga is bonded in a 10-coordinate geometry to five Hf and five Ga atoms. There are one shorter (2.58 Å) and one longer (2.80 Å) Ga–Ga bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf3ScSi4 by Materials Project

ScHf3Si4 crystallizes in the monoclinic Pm space group. The structure is three-dimensional. Sc is bonded in a 7-coordinate geometry to seven Si atoms. There are a spread of Sc–Si bond distances ranging from 2.72–2.94 Å. There are three inequivalent Hf sites. In the first Hf site, Hf is bonded in a 7-coordinate geometry to seven Si atoms. There are a spread of Hf–Si bond distances ranging from 2.72–2.91 Å. In the second Hf site, Hf is bonded in a 7-coordinate geometry to seven Si atoms. There are a spread of Hf–Si bond distances ranging from 2.70–2.91 Å. In the third Hf site, Hf is bonded in a 7-coordinate geometry to seven Si atoms. There are a spread of Hf–Si bond distances ranging from 2.72–2.93 Å. There are four inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to two equivalent Sc, five Hf, and two equivalent Si atoms. Both Si–Si bond lengths are 2.45 Å. In the second Si site, Si is bonded in a 9-coordinate geometry to one Sc, six Hf, and two equivalent Si atoms. Both Si–Si bond lengths are 2.45 Å. In the third Si site, Si is bonded in a 9-coordinate geometry to two equivalent Sc, five Hf, and two equivalent Si atoms. In the fourth Si site, Si is bonded in a 9-coordinate geometry to two equivalent Sc, five Hf, and two equivalent Si atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2021

Multi-phase equation of state of ultrapure hafnium to 120 GPa

Hafnium (Hf) is an industrially important material due to its large neutron absorption cross-section and its high corrosion resistance. When subjected to high pressure, Hf phase transforms from its hexagonal close packed α-Hf phase to the hexagonal ω-Hf phase. Upon further compression, ω-Hf phase transforms to the body centered cubic β-Hf phase. In this study, the high pressure phase transformations of Hf are studied by compressing and decompressing a well-characterized Hf sample in diamond anvil cells up to 120 GPa while collecting x-ray diffraction data. The phase transformations of Hf were compared in both a He pressure transmitting medium (PTM) and no PTM over several experiments. It was found that the α-Hf to ω-Hf phase transition occurs at a higher pressure during compression and lower pressure during decompression with a helium (He) PTM compared to using no PTM. Finally, there was little difference in the ω-Hf to β-Hf phase transition pressure between the He PTM and no PTM. The equation of state was fit for all three phases of Hf and under both PTM and no-PTM.

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗