SEARCH · Engineering Papers

Results for “Ni(HO)2”

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.

SourceResearch connectionFrom yearThrough year

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 19 records

All sources NASA NTRS DOE OSTI

DOE OSTI2021

Crystal and Magnetic Structures of the Ternary Ho 2 Ni 0.8 Si 1.2 and Ho 2 Ni 0.8 Ge 1.2 Compounds: An Example of Intermetallics Crystallizing with the Zr 2 Ni 1–x P Prototype

We report two new rare-earth (R) ternary intermetallic compounds—Ho 2 Ni 0.8 T 1.2 with T = Si and Ge—that correspond to the R 5 Ni 2 T 3 phase earlier reported to form in Dy–Ni–T and Ho–Ni–T ternary systems. The compounds crystallize in a filled version of the orthorhombic Zr 2 Ni 1–x P-type structure with x = 0.52; their stoichiometry, determined from both single-crystal and powder X-ray diffraction data, is centered on Ho 2 Ni 0.8 T 1.2 with a narrow solid solubility range for the silicide, while the germanide appears to be a line phase. In addition to R = Dy and Ho, R 2 Ni 0.8 T 1.2 compounds also form for R = Y and Tb, representing the first examples of rare-earth-based compounds adopting the Zr 2 Ni 1–x P structural prototype. Bulk magnetization data reveal the main transitions of the ferrimagnetic or ferromagnetic type at TC = 38 K for Ho 2 Ni 0.8 Si 1.2 and TC = 37 K for Ho 2 Ni 0.8 Ge 1.2 , which are followed by subsequent magnetic reordering at lower temperatures. Neutron diffraction shows complex magnetic structures below T C with both ferromagnetic and antiferromagnetic components and magnetic propagation vector κ 1 = [0, 0, 0]. Below T N ≅ 24 K (22 K) for the silicide (germanide), an additional antiferromagnetic coupling following an incommensurate magnetic propagation vector κ 2 = [κ x , 0, 0] appears to coexist with the first magnetic structure.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗

DOE OSTI2020

Materials Data on Ni(HO)2 by Materials Project

Ni(OH)2 crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three Ni(OH)2 sheets oriented in the (0, 0, 1) direction. Ni2+ is bonded to six equivalent O2- atoms to form edge-sharing NiO6 octahedra. All Ni–O bond lengths are 2.09 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. O2- is bonded in a distorted single-bond geometry to three equivalent Ni2+ and one H1+ atom.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ni(HO)2 by Materials Project

Ni(OH)2 crystallizes in the monoclinic C2 space group. The structure is two-dimensional and consists of one Ni(OH)2 sheet oriented in the (0, 0, 1) direction. Ni2+ is bonded to six equivalent O2- atoms to form edge-sharing NiO6 octahedra. There are a spread of Ni–O bond distances ranging from 2.08–2.10 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. O2- is bonded in a distorted single-bond geometry to three equivalent Ni2+ and one H1+ atom.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ni(HO)2 by Materials Project

Ni(OH)2 crystallizes in the monoclinic C2 space group. The structure is two-dimensional and consists of one Ni(OH)2 sheet oriented in the (0, 0, 1) direction. Ni2+ is bonded to six equivalent O2- atoms to form edge-sharing NiO6 octahedra. There are two shorter (2.08 Å) and four longer (2.10 Å) Ni–O bond lengths. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. O2- is bonded in a distorted single-bond geometry to three equivalent Ni2+ and one H1+ atom.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ni(HO)2 by Materials Project

Ni(OH)2 crystallizes in the monoclinic C2 space group. The structure is two-dimensional and consists of one Ni(OH)2 sheet oriented in the (0, 0, 1) direction. Ni2+ is bonded to six equivalent O2- atoms to form edge-sharing NiO6 octahedra. There are two shorter (2.08 Å) and four longer (2.09 Å) Ni–O bond lengths. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. O2- is bonded in a distorted single-bond geometry to three equivalent Ni2+ and one H1+ atom.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ni(HO)2 by Materials Project

Ni(OH)2 crystallizes in the trigonal P3m1 space group. The structure is two-dimensional and consists of one Ni(OH)2 sheet oriented in the (0, 0, 1) direction. Ni2+ is bonded in a distorted q6 geometry to three equivalent H1+ and six O2- atoms. All Ni–H bond lengths are 1.93 Å. There are three shorter (2.12 Å) and three longer (2.16 Å) Ni–O bond lengths. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to three equivalent Ni2+ and one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to three equivalent Ni2+ and one H1+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to three equivalent Ni2+ and one H1+ atom.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ni(HO)2 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ni(HO)2 by Materials Project

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ni(HO)2 by Materials Project

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on NiH6(SO6)2 by Materials Project

Ni(HO)4(HSO4)2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two sulfur trioxide monohydrate molecules and one Ni(HO)4 cluster. In the Ni(HO)4 cluster, Ni is bonded in a square co-planar geometry to four O atoms. There is two shorter (1.73 Å) and two longer (2.16 Å) Ni–O bond length. There are two inequivalent H sites. In the first H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the second H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. There are two inequivalent O sites. In the first O site, O is bonded in a distorted single-bond geometry to one Ni and one H atom. In the second O site, O is bonded in a bent 150 degrees geometry to one Ni and one H atom.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on NiH12(BrO7)2 by Materials Project

Ni(HO)12(BrO)2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two hypobromous acid molecules and one Ni(HO)12 cluster. In the Ni(HO)12 cluster, Ni is bonded in a 6-coordinate geometry to six O atoms. There is four shorter (1.83 Å) and two longer (1.84 Å) Ni–O bond length. There are six inequivalent H sites. In the first H site, H is bonded in a distorted single-bond geometry to two O atoms. There is one shorter (1.01 Å) and one longer (1.67 Å) H–O bond length. In the second H site, H is bonded in a distorted single-bond geometry to two O atoms. There is one shorter (1.01 Å) and one longer (1.66 Å) H–O bond length. In the third H site, H is bonded in a distorted single-bond geometry to two O atoms. There is one shorter (1.01 Å) and one longer (1.67 Å) H–O bond length. In the fourth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the fifth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the sixth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. There are six inequivalent O sites. In the first O site, O is bonded in a water-like geometry to one Ni and one H atom. In the second O site, O is bonded in a water-like geometry to one Ni and one H atom. In the third O site, O is bonded in a water-like geometry to one Ni and one H atom. In the fourth O site, O is bonded in a water-like geometry to two H atoms. In the fifth O site, O is bonded in a water-like geometry to two H atoms. In the sixth O site, O is bonded in a water-like geometry to two H atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ho2(Ni2B)5 by Materials Project

Ho2(Ni2B)5 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. there are two inequivalent Ho sites. In the first Ho site, Ho is bonded in a 7-coordinate geometry to fifteen Ni and three B atoms. There are a spread of Ho–Ni bond distances ranging from 2.75–3.33 Å. There are a spread of Ho–B bond distances ranging from 2.72–2.85 Å. In the second Ho site, Ho is bonded in a 2-coordinate geometry to fourteen Ni and five B atoms. There are a spread of Ho–Ni bond distances ranging from 2.78–3.16 Å. There are a spread of Ho–B bond distances ranging from 2.71–3.05 Å. There are ten inequivalent Ni sites. In the first Ni site, Ni is bonded in a 4-coordinate geometry to three Ho and four B atoms. There are a spread of Ni–B bond distances ranging from 2.06–2.10 Å. In the second Ni site, Ni is bonded in a 4-coordinate geometry to two Ho and three B atoms. There are two shorter (2.06 Å) and one longer (2.10 Å) Ni–B bond lengths. In the third Ni site, Ni is bonded in a 3-coordinate geometry to three equivalent Ho and three B atoms. There are a spread of Ni–B bond distances ranging from 1.92–2.19 Å. In the fourth Ni site, Ni is bonded in a 12-coordinate geometry to three Ho and three B atoms. There are two shorter (2.03 Å) and one longer (2.06 Å) Ni–B bond lengths. In the fifth Ni site, Ni is bonded in a 2-coordinate geometry to three Ho and three B atoms. There are a spread of Ni–B bond distances ranging from 2.03–2.13 Å. In the sixth Ni site, Ni is bonded in a 1-coordinate geometry to three equivalent Ho and two B atoms. There are one shorter (2.02 Å) and one longer (2.22 Å) Ni–B bond lengths. In the seventh Ni site, Ni is bonded in a 2-coordinate geometry to four Ho and three B atoms. There are a spread of Ni–B bond distances ranging from 2.05–2.13 Å. In the eighth Ni site, Ni is bonded in a 3-coordinate geometry to three equivalent Ho and three B atoms. There are a spread of Ni–B bond distances ranging from 1.97–2.06 Å. In the ninth Ni site, Ni is bonded in a 3-coordinate geometry to three equivalent Ho and three B atoms. There are a spread of Ni–B bond distances ranging from 2.02–2.09 Å. In the tenth Ni site, Ni is bonded in a 4-coordinate geometry to two Ho and four B atoms. There are a spread of Ni–B bond distances ranging from 2.05–2.13 Å. There are five inequivalent B sites. In the first B site, B is bonded in a 9-coordinate geometry to two equivalent Ho, six Ni, and one B atom. The B–B bond length is 1.91 Å. In the second B site, B is bonded in a 7-coordinate geometry to two equivalent Ho, six Ni, and one B atom. The B–B bond length is 1.72 Å. In the third B site, B is bonded in a 7-coordinate geometry to one Ho and seven Ni atoms. In the fourth B site, B is bonded in a 9-coordinate geometry to two equivalent Ho, six Ni, and one B atom. In the fifth B site, B is bonded in a 8-coordinate geometry to one Ho, six Ni, and one B atom.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ho10In20Ni9 by Materials Project

Ho10Ni9In20 is beta Plutonium-derived structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. there are four inequivalent Ho sites. In the first Ho site, Ho is bonded in a 12-coordinate geometry to four equivalent Ni and eight In atoms. All Ho–Ni bond lengths are 3.01 Å. There are four shorter (3.25 Å) and four longer (3.34 Å) Ho–In bond lengths. In the second Ho site, Ho is bonded in a 12-coordinate geometry to four equivalent Ni and eight In atoms. All Ho–Ni bond lengths are 2.99 Å. There are four shorter (3.25 Å) and four longer (3.36 Å) Ho–In bond lengths. In the third Ho site, Ho is bonded in a 2-coordinate geometry to three Ni and nine In atoms. There are two shorter (2.89 Å) and one longer (3.38 Å) Ho–Ni bond lengths. There are a spread of Ho–In bond distances ranging from 3.09–3.37 Å. In the fourth Ho site, Ho is bonded in a 11-coordinate geometry to three Ni and eight In atoms. There are two shorter (3.02 Å) and one longer (3.07 Å) Ho–Ni bond lengths. There are a spread of Ho–In bond distances ranging from 3.17–3.38 Å. There are three inequivalent Ni sites. In the first Ni site, Ni is bonded in a 9-coordinate geometry to four Ho and five In atoms. There are a spread of Ni–In bond distances ranging from 2.71–2.84 Å. In the second Ni site, Ni is bonded in a 8-coordinate geometry to eight In atoms. There are four shorter (2.65 Å) and four longer (2.94 Å) Ni–In bond lengths. In the third Ni site, Ni is bonded in a 10-coordinate geometry to four Ho and six In atoms. There are a spread of Ni–In bond distances ranging from 2.69–2.99 Å. There are five inequivalent In sites. In the first In site, In is bonded in a 2-coordinate geometry to five Ho, three Ni, and five In atoms. There are a spread of In–In bond distances ranging from 3.15–3.28 Å. In the second In site, In is bonded in a 2-coordinate geometry to two equivalent Ho, two Ni, and one In atom. In the third In site, In is bonded in a 11-coordinate geometry to four Ho, three Ni, and two equivalent In atoms. In the fourth In site, In is bonded in a 9-coordinate geometry to six Ho and three Ni atoms. In the fifth In site, In is bonded in a 6-coordinate geometry to four Ho and two equivalent Ni atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ho(Ni2P)2 by Materials Project

Ho(Ni2P)2 crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Ho is bonded in a 6-coordinate geometry to six equivalent P atoms. There are two shorter (2.79 Å) and four longer (2.83 Å) Ho–P bond lengths. Ni is bonded in a 3-coordinate geometry to three equivalent P atoms. There are two shorter (2.30 Å) and one longer (2.31 Å) Ni–P bond lengths. P is bonded in a 9-coordinate geometry to three equivalent Ho and six equivalent Ni atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ho12Ni6Pb by Materials Project

Ho12Ni6Pb crystallizes in the cubic Im-3 space group. The structure is three-dimensional. Ho is bonded in a 1-coordinate geometry to four equivalent Ni and one Pb atom. There are a spread of Ho–Ni bond distances ranging from 2.62–3.48 Å. The Ho–Pb bond length is 3.46 Å. Ni is bonded in a 2-coordinate geometry to eight equivalent Ho and one Ni atom. The Ni–Ni bond length is 2.38 Å. Pb is bonded in a cuboctahedral geometry to twelve equivalent Ho atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ho2Ni17 by Materials Project

Ho2Ni17 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Ho sites. In the first Ho site, Ho is bonded in a 12-coordinate geometry to eighteen Ni atoms. There are a spread of Ho–Ni bond distances ranging from 2.89–3.21 Å. In the second Ho site, Ho is bonded in a 8-coordinate geometry to twenty Ni atoms. There are a spread of Ho–Ni bond distances ranging from 2.82–3.12 Å. There are four inequivalent Ni sites. In the first Ni site, Ni is bonded in a 2-coordinate geometry to one Ho and thirteen Ni atoms. There are a spread of Ni–Ni bond distances ranging from 2.39–2.71 Å. In the second Ni site, Ni is bonded to two equivalent Ho and ten Ni atoms to form NiHo2Ni10 cuboctahedra that share corners with fourteen NiHo2Ni10 cuboctahedra, edges with six equivalent NiHo3Ni9 cuboctahedra, and faces with ten NiHo2Ni10 cuboctahedra. There are four shorter (2.38 Å) and four longer (2.39 Å) Ni–Ni bond lengths. In the third Ni site, Ni is bonded in a 12-coordinate geometry to two Ho and ten Ni atoms. There are a spread of Ni–Ni bond distances ranging from 2.37–2.51 Å. In the fourth Ni site, Ni is bonded to three Ho and nine Ni atoms to form a mixture of distorted corner, edge, and face-sharing NiHo3Ni9 cuboctahedra. Both Ni–Ni bond lengths are 2.39 Å.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ho(NiGe)2 by Materials Project

HoNi2Ge2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ho is bonded in a 8-coordinate geometry to eight equivalent Ni and eight equivalent Ge atoms. All Ho–Ni bond lengths are 3.18 Å. All Ho–Ge bond lengths are 3.13 Å. Ni is bonded in a 4-coordinate geometry to four equivalent Ho and four equivalent Ge atoms. All Ni–Ge bond lengths are 2.35 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Ho, four equivalent Ni, and one Ge atom. The Ge–Ge bond length is 2.51 Å.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ho4Ga21Ni10 by Materials Project

Ho4Ni10Ga21 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Ho sites. In the first Ho site, Ho is bonded in a 7-coordinate geometry to four Ni and nine Ga atoms. There are two shorter (3.13 Å) and two longer (3.15 Å) Ho–Ni bond lengths. There are a spread of Ho–Ga bond distances ranging from 2.88–3.21 Å. In the second Ho site, Ho is bonded in a 2-coordinate geometry to four Ni and eleven Ga atoms. There are a spread of Ho–Ni bond distances ranging from 2.98–3.14 Å. There are a spread of Ho–Ga bond distances ranging from 2.86–3.40 Å. In the third Ho site, Ho is bonded in a 2-coordinate geometry to four Ni and eleven Ga atoms. There are a spread of Ho–Ni bond distances ranging from 2.98–3.15 Å. There are a spread of Ho–Ga bond distances ranging from 2.86–3.41 Å. In the fourth Ho site, Ho is bonded in a 7-coordinate geometry to four Ni and nine Ga atoms. There are a spread of Ho–Ni bond distances ranging from 3.11–3.15 Å. There are a spread of Ho–Ga bond distances ranging from 2.89–3.20 Å. There are ten inequivalent Ni sites. In the first Ni site, Ni is bonded in a 10-coordinate geometry to two equivalent Ho, one Ni, and seven Ga atoms. The Ni–Ni bond length is 2.72 Å. There are a spread of Ni–Ga bond distances ranging from 2.38–2.57 Å. In the second Ni site, Ni is bonded in a 9-coordinate geometry to nine Ga atoms. There are a spread of Ni–Ga bond distances ranging from 2.47–2.61 Å. In the third Ni site, Ni is bonded in a 9-coordinate geometry to nine Ga atoms. There are a spread of Ni–Ga bond distances ranging from 2.47–2.60 Å. In the fourth Ni site, Ni is bonded in a 10-coordinate geometry to two equivalent Ho, one Ni, and seven Ga atoms. The Ni–Ni bond length is 2.74 Å. There are a spread of Ni–Ga bond distances ranging from 2.47–2.56 Å. In the fifth Ni site, Ni is bonded in a 10-coordinate geometry to two equivalent Ho and eight Ga atoms. There are a spread of Ni–Ga bond distances ranging from 2.46–2.70 Å. In the sixth Ni site, Ni is bonded in a 7-coordinate geometry to two equivalent Ho and seven Ga atoms. There are a spread of Ni–Ga bond distances ranging from 2.36–2.62 Å. In the seventh Ni site, Ni is bonded in a 7-coordinate geometry to two equivalent Ho and seven Ga atoms. There are a spread of Ni–Ga bond distances ranging from 2.36–2.62 Å. In the eighth Ni site, Ni is bonded in a 10-coordinate geometry to two equivalent Ho and eight Ga atoms. There are a spread of Ni–Ga bond distances ranging from 2.47–2.71 Å. In the ninth Ni site, Ni is bonded in a 10-coordinate geometry to two equivalent Ho, one Ni, and seven Ga atoms. There are a spread of Ni–Ga bond distances ranging from 2.47–2.55 Å. In the tenth Ni site, Ni is bonded in a 10-coordinate geometry to two equivalent Ho, one Ni, and seven Ga atoms. There are a spread of Ni–Ga bond distances ranging from 2.39–2.57 Å. There are twenty-one inequivalent Ga sites. In the first Ga site, Ga is bonded in a 1-coordinate geometry to one Ho, three Ni, and two equivalent Ga atoms. There are one shorter (2.91 Å) and one longer (2.92 Å) Ga–Ga bond lengths. In the second Ga site, Ga is bonded in a 11-coordinate geometry to one Ho, four Ni, and six Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.70–2.89 Å. In the third Ga site, Ga is bonded in a 5-coordinate geometry to two equivalent Ho, three Ni, and one Ga atom. The Ga–Ga bond length is 2.66 Å. In the fourth Ga site, Ga is bonded in a 12-coordinate geometry to three Ho, three Ni, and one Ga atom. The Ga–Ga bond length is 2.68 Å. In the fifth Ga site, Ga is bonded in a 12-coordinate geometry to three Ho, four Ni, and five Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.82–2.93 Å. In the sixth Ga site, Ga is bonded in a 12-coordinate geometry to three Ho, four Ni, and five Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.82–2.93 Å. In the seventh Ga site, Ga is bonded in a 5-coordinate geometry to two equivalent Ho, three Ni, and two Ga atoms. There are one shorter (2.66 Å) and one longer (2.87 Å) Ga–Ga bond lengths. In the eighth Ga site, Ga is bonded in a 10-coordinate geometry to one Ho, four Ni, and five Ga atoms. There are one shorter (2.73 Å) and one longer (2.74 Å) Ga–Ga bond lengths. In the ninth Ga site, Ga is bonded in a 12-coordinate geometry to three Ho, four Ni, and five Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.81–2.94 Å. In the tenth Ga site, Ga is bonded in a 10-coordinate geometry to three Ho, three Ni, and four Ga atoms. In the eleventh Ga site, Ga is bonded in a 11-coordinate geometry to one Ho, four Ni, and six Ga atoms. The Ga–Ga bond length is 2.89 Å. In the twelfth Ga site, Ga is bonded in a 5-coordinate geometry to one Ho, five Ni, and two Ga atoms. In the thirteenth Ga site, Ga is bonded in a 12-coordinate geometry to three Ho, four Ni, and five Ga atoms. There are one shorter (2.81 Å) and two longer (2.87 Å) Ga–Ga bond lengths. In the fourteenth Ga site, Ga is bonded in a 5-coordinate geometry to one Ho, five Ni, and two Ga atoms. In the fifteenth Ga site, Ga is bonded in a 12-coordinate geometry to four Ni and eight Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.57–2.93 Å. In the sixteenth Ga site, Ga is bonded in a 12-coordinate geometry to two equivalent Ho, three Ni, and one Ga atom. In the seventeenth Ga site, Ga is bonded in a 1-coordinate geometry to one Ho, three Ni, and two equivalent Ga atoms. In the eighteenth Ga site, Ga is bonded in a 12-coordinate geometry to three Ho and three Ni atoms. In the nineteenth Ga site, Ga is bonded in a 12-coordinate geometry to two equivalent Ho, three Ni, and one Ga atom. In the twentieth Ga site, Ga is bonded in a 10-coordinate geometry to one Ho, four Ni, and five Ga atoms. In the twenty-first Ga site, Ga is bonded in a 10-coordinate geometry to three Ho, three Ni, and two equivalent Ga atoms.

36 MATERIALS SCIENCE↗