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All sourcesNASA NTRSDOE OSTI
DOE OSTI2024

Chelator‐Assisted Precipitation‐Based Separation of the Rare Earth Elements Neodymium and Dysprosium from Aqueous Solutions

The rare earth elements (REEs) are critical resources for many clean energy technologies, but are difficult to obtain in their elementally pure forms because of their nearly identical chemical properties. Here, an analogue of macropa, G-macropa, was synthesized and employed for an aqueous precipitation-based separation of Nd 3+ and Dy 3+ . G-macropa maintains the same thermodynamic preference for the large REEs as macropa, but shows smaller thermodynamic stability constants. Molecular dynamics studies demonstrate that the binding affinity differences of these chelators for Nd 3+ and Dy 3+ is a consequence of the presence or absence of an inner-sphere water molecule, which alters the donor strength of the macrocyclic ethers. Leveraging the small REE affinity of G-macropa, we demonstrate that within aqueous solutions of Nd 3+ , Dy 3+ , and G-macropa, the addition of HCO 3 − selectively precipitates Dy 2 (CO 3 ) 3 , leaving the Nd 3+ −G-macropa complex in solution. With this method, remarkably high separation factors of 841 and 741 are achieved for 50 : 50 and 75 : 25 mixtures. Further studies involving Nd 3+ :Dy 3+ ratios of 95 : 5 in authentic magnet waste also afford an efficient separation as well. Finally, G-macropa is recovered via crystallization with HCl and used for subsequent extractions, demonstrating its good recyclability.

Gao, Yangyang↗
DOE OSTI2026

Measurement of the top quark pair production cross section in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=5.36$ TeV

The inclusive cross section for top quark pair ($\mathrm{t}\overline{\mathrm{t}}$) production in lead-lead (PbPb) collisions is reported for the first time at a center-of-mass energy per nucleon pair of 5.36 TeV. The analysis uses data corresponding to an integrated luminosity of 1.58 nb −1 collected by the CMS experiment at the CERN LHC in 2023. The $\mathrm{t}\overline{\mathrm{t}}$ production cross section, ${\sigma}_{\mathrm{t}\overline{\mathrm{t}}}={3.42}_{-0.51}^{+0.54}{\left(\mathrm{stat}\right)}_{-0.43}^{+0.50}\left(\mathrm{syst}\right)$ μb, is measured in dilepton final states using a fit to a multivariate discriminator that combines the decay electron and muon kinematic properties with the multiplicity of bottom quark jets. The result is consistent with perturbative quantum chromodynamics calculations at next-to-next-to-leading order (NNLO) accuracy employing several nuclear parton distribution functions. In addition, the Drell–Yan production cross section (σ DY ) for dilepton masses above 10 GeV and the ratio of $\mathrm{t}\overline{\mathrm{t}}$ to DY cross sections $\left({R}_{\mathrm{t}\overline{\mathrm{t}}/\mathrm{DY}}\right)$ are found to be compatible with the NNLO predictions. The observables ${\sigma}_{\mathrm{t}\overline{\mathrm{t}}}$, σ DY , and ${R}_{\mathrm{t}\overline{\mathrm{t}}/\mathrm{DY}}$ are measured separately for central and semicentral PbPb collisions to investigate for the first time the dependence of top quark production on the collision impact parameter.

Heavy Ion Experiments↗
DOE OSTI2020

Substituent Effects on Exchange Coupling and Magnetic Relaxation in 2,2'-Bipyrimidine Radical-Bridged Dilanthanide Complexes

Systematic analysis of related compounds is crucial to the design of single-molecule magnets with improved properties, yet such studies on multinuclear lanthanide complexes with strong magnetic coupling remain rare. In this work, we present the synthesis and magnetic characterization of the series of radical-bridged dilanthanide complex salts [(Cp* 2 Ln) 2 (μ-5,5'-R 2 bpym)](BPh 4 ) (Ln = Gd, Dy; R = NMe 2 (1), OEt (2), Me (3), F (4); bpym = 2,2'-bipyrimidine). Modification of the substituent on the bridging 5,5'-R 2 bpym radical anion allows the magnetic exchange coupling constant, J Gd-rad , for the gadolinium compounds in this series to be tuned over a range from -2.7 cm -1 (1) to -11.1 cm -1 (4), with electron-withdrawing or -donating substituents increasing or decreasing the strength of exchange coupling, respectively. Modulation of the exchange coupling interaction has a significant impact on the magnetic relaxation dynamics of the single-molecule magnets 1-Dy through 4-Dy, where stronger J Gd-rad for the corresponding Gd 3+ compounds is associated with larger thermal barriers to magnetic relaxation ( U eff ), open magnetic hysteresis at higher temperatures, and slower magnetic relaxation rates for through-barrier processes. Further, we derive an empirical linear correlation between the experimental U eff values for 1-Dy through 4-Dy and the magnitude of J Gd-rad for the corresponding gadolinium derivatives that provides insight into the electronic structure of these complexes. This simple model applies to other organic radical-bridged dysprosium complexes in the literature, and it establishes clear design criteria for increasing magnetic operating temperatures in radical-bridged molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2021

Strong Ferromagnetic Exchange Coupling and Single-Molecule Magnetism in MoS 4 3– -Bridged Dilanthanide Complexes

We report the synthesis and characterization of the trinuclear 4d-4f compounds [Co(C 5 Me 5 ) 2 ][(C 5 Me 5 ) 2 Ln(μ-S) 2 Mo(μ-S) 2 Ln(C 5 Me 5 ) 2 ], 1-Ln (Ln = Y, Gd, Tb, Dy), containing the highly polarizable MoS 4 3 - bridging unit. UV-Vis-NIR diffuse reflectance spectra and DFT calculations of 1-Ln reveal a low-energy metal-to-metal charge transfer transition assigned to charge transfer from the singly occupied 4d z 2 orbital of Mo V to the empty 5d orbitals of the lanthanides (4d in the case of 1-Y ), mediated by sulfur-based 3p orbitals. Electron paramagnetic resonance spectra collected for 1-Y in a tetrahydrofuran solution show large 89 Y hyperfine coupling constants of A ⊥ = 23 MHz and A || = 26 MHz, indicating the presence of significant yttrium-localized unpaired electron density. Magnetic susceptibility data support similar electron delocalization and ferromagnetic Ln-Mo exchange for 1-Gd , 1-Tb , and 1-Dy . This ferromagnetic exchange gives rise to an S = 15/2 ground state for 1-Gd and one of the largest magnetic exchange constants involving Gd III observed to date, with J Gd-Mo = +16.1(2) cm -1 . Additional characterization of 1-Tb and 1-Dy by ac magnetic susceptibility measurements reveals that both compounds exhibit slow magnetic relaxation. Although a Raman magnetic relaxation process is dominant for both 1-Tb and 1-Dy , an extracted thermal relaxation barrier of U eff = 68 cm -1 for 1-Dy is the largest yet reported for a complex containing a paramagnetic 4d metal center. Furthermore, these results provide a potentially generalizable route to enhanced n d-4f magnetic exchange, revealing opportunities for the design of new n d-4f single-molecule magnets and bulk magnetic materials.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2023

The effect of rare earth (RE 3+ ) ionic radii on transparent lanthanide-tellurite glass-ceramics: correlation between ‘hole-formalism’ and crystallization

Rare earth (RE) doped transparent tellurite glass-ceramics (GCs) are widely explored for their application as advanced photonic materials. Specifically, the growth of RE based “anti-glass” crystalline phases in transparent GCs enhances their effective functionality. Enormous studies on the properties of GCs revealed that optimization of glass composition and heat-treatment schedule are the foremost factors that affect the transparency of the GCs. Nevertheless, the direct effect of RE 3+ ions on the crystallization mechanism of glass has hardly been reported. Therefore, a base glass of the composition La 2 O 3 –Gd 2 O 3 –TiO 2 –TeO 2 (LGTT) is doped with RE 3+ ions (Ce 3+ , Pr 3+ , Nd 3+ , Sm 3+ , Eu 3+ , Tb 3+ , and Dy 3+ ) with varied ionic radii. Rietveld refinement from XRD of GCs confirms that (La/Gd) 2 Te 6 O 15 phases are precipitated, where dopants Ce, Pr and Nd occupy La sites, while Sm, Eu, Tb, and Dy occupy Gd sites. The configurational heat-capacity (ΔC p ) from DSC is found to be lower for larger ionic radii REs (Ce, Pr, Nd) than smaller ionic radii REs (Sm, Eu, Tb, Dy) thereby exhibiting higher chemical ordering followed by faster crystal growth rate in the former. However, the transparency retention profile of different RE-doped GCs follows the trend Eu:Tb > Sm:Dy > Nd > Pr > Ce, confirming the ionic radii effect. In addition to the ionic radii effect, in this work, we propose a ‘Hole-Formalism’ concept to explain the observed trend. It is further corroborated with an identical neutron diffraction pattern and ΔC p values for these ion pairs Sm 3+ : Dy 3+ (4f 5 : 4f 9 ) and Eu 3+ : Tb 3+ (4f 6 : 4f 8 ) results in a similar crystallization mechanism, transmission profile and fine-scale microstructures of these RE-based tellurite GCs.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy4(SiS4)3 by Materials Project

Dy4(SiS4)3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are four inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 6-coordinate geometry to six S2- atoms. There are a spread of Dy–S bond distances ranging from 2.72–2.84 Å. In the second Dy3+ site, Dy3+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of Dy–S bond distances ranging from 2.77–2.97 Å. In the third Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Dy–S bond distances ranging from 2.83–3.01 Å. In the fourth Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Dy–S bond distances ranging from 2.78–3.17 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of Si–S bond distances ranging from 2.11–2.16 Å. In the second Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of Si–S bond distances ranging from 2.09–2.14 Å. In the third Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of Si–S bond distances ranging from 2.10–2.15 Å. There are twelve inequivalent S2- sites. In the first S2- site, S2- is bonded in a 3-coordinate geometry to two equivalent Dy3+ and one Si4+ atom. In the second S2- site, S2- is bonded in a 3-coordinate geometry to two Dy3+ and one Si4+ atom. In the third S2- site, S2- is bonded in a distorted T-shaped geometry to two Dy3+ and one Si4+ atom. In the fourth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three Dy3+ and one Si4+ atom. In the fifth S2- site, S2- is bonded in a 3-coordinate geometry to two Dy3+ and one Si4+ atom. In the sixth S2- site, S2- is bonded in a 3-coordinate geometry to two Dy3+ and one Si4+ atom. In the seventh S2- site, S2- is bonded in a 1-coordinate geometry to two Dy3+ and one Si4+ atom. In the eighth S2- site, S2- is bonded in a distorted trigonal pyramidal geometry to three Dy3+ and one Si4+ atom. In the ninth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three Dy3+ and one Si4+ atom. In the tenth S2- site, S2- is bonded in a 3-coordinate geometry to two Dy3+ and one Si4+ atom. In the eleventh S2- site, S2- is bonded in a 4-coordinate geometry to three Dy3+ and one Si4+ atom. In the twelfth S2- site, S2- is bonded in a 4-coordinate geometry to three Dy3+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DyCd3 by Materials Project

DyCd3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Dy is bonded in a 12-coordinate geometry to twelve Cd atoms. There are a spread of Dy–Cd bond distances ranging from 3.20–3.62 Å. There are two inequivalent Cd sites. In the first Cd site, Cd is bonded in a 12-coordinate geometry to four equivalent Dy and eight equivalent Cd atoms. There are a spread of Cd–Cd bond distances ranging from 3.03–3.34 Å. In the second Cd site, Cd is bonded in a 11-coordinate geometry to four equivalent Dy and seven Cd atoms. There are one shorter (3.09 Å) and two longer (3.21 Å) Cd–Cd bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy2Al6Si4Au by Materials Project

Dy2AuAl6Si4 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Dy is bonded to six Si atoms to form distorted DySi6 octahedra that share corners with twelve AlSi3Au tetrahedra, edges with six equivalent DySi6 octahedra, and edges with six AlSi3Au tetrahedra. There are three shorter (2.96 Å) and three longer (2.97 Å) Dy–Si bond lengths. Au is bonded in a body-centered cubic geometry to eight Al atoms. There are six shorter (2.57 Å) and two longer (2.63 Å) Au–Al bond lengths. There are three inequivalent Al sites. In the first Al site, Al is bonded to four equivalent Si atoms to form distorted AlSi4 tetrahedra that share corners with six equivalent DySi6 octahedra, corners with six equivalent AlSi4 tetrahedra, edges with three equivalent DySi6 octahedra, and edges with three equivalent AlSi4 tetrahedra. The corner-sharing octahedra tilt angles range from 20–55°. There are three shorter (2.51 Å) and one longer (2.54 Å) Al–Si bond lengths. In the second Al site, Al is bonded to one Au and three equivalent Si atoms to form AlSi3Au tetrahedra that share corners with three equivalent DySi6 octahedra, corners with ten AlSi3Au tetrahedra, edges with three equivalent DySi6 octahedra, and edges with three equivalent AlSiAu3 tetrahedra. The corner-sharing octahedral tilt angles are 17°. All Al–Si bond lengths are 2.55 Å. In the third Al site, Al is bonded to three equivalent Au and one Si atom to form distorted AlSiAu3 tetrahedra that share corners with three equivalent DySi6 octahedra, corners with twelve AlSi3Au tetrahedra, and edges with six AlSi3Au tetrahedra. The corner-sharing octahedral tilt angles are 55°. The Al–Si bond length is 2.58 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded to three equivalent Dy and four Al atoms to form a mixture of distorted corner and edge-sharing SiDy3Al4 pentagonal bipyramids. In the second Si site, Si is bonded to three equivalent Dy and four equivalent Al atoms to form a mixture of distorted corner and edge-sharing SiDy3Al4 pentagonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DyNi5 by Materials Project

DyNi5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Dy is bonded in a distorted hexagonal planar geometry to eighteen Ni atoms. There are six shorter (2.81 Å) and twelve longer (3.13 Å) Dy–Ni bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded to four equivalent Dy and eight Ni atoms to form a mixture of corner, edge, and face-sharing NiDy4Ni8 cuboctahedra. There are four shorter (2.42 Å) and four longer (2.43 Å) Ni–Ni bond lengths. In the second Ni site, Ni is bonded in a 12-coordinate geometry to three equivalent Dy and six equivalent Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy2Sb5 by Materials Project

Dy2Sb5 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are four inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 9-coordinate geometry to nine Sb+1.20- atoms. There are a spread of Dy–Sb bond distances ranging from 3.10–3.36 Å. In the second Dy3+ site, Dy3+ is bonded in a 9-coordinate geometry to nine Sb+1.20- atoms. There are a spread of Dy–Sb bond distances ranging from 3.13–3.32 Å. In the third Dy3+ site, Dy3+ is bonded in a 9-coordinate geometry to nine Sb+1.20- atoms. There are a spread of Dy–Sb bond distances ranging from 3.18–3.32 Å. In the fourth Dy3+ site, Dy3+ is bonded in a 9-coordinate geometry to ten Sb+1.20- atoms. There are a spread of Dy–Sb bond distances ranging from 3.19–3.90 Å. There are ten inequivalent Sb+1.20- sites. In the first Sb+1.20- site, Sb+1.20- is bonded in a 7-coordinate geometry to three Dy3+ and four Sb+1.20- atoms. There are two shorter (3.00 Å) and two longer (3.17 Å) Sb–Sb bond lengths. In the second Sb+1.20- site, Sb+1.20- is bonded in a 7-coordinate geometry to five Dy3+ and two equivalent Sb+1.20- atoms. Both Sb–Sb bond lengths are 3.16 Å. In the third Sb+1.20- site, Sb+1.20- is bonded in a 6-coordinate geometry to three Dy3+ and three Sb+1.20- atoms. There are one shorter (2.88 Å) and two longer (3.03 Å) Sb–Sb bond lengths. In the fourth Sb+1.20- site, Sb+1.20- is bonded in a 8-coordinate geometry to four Dy3+ and four Sb+1.20- atoms. There are two shorter (2.94 Å) and two longer (3.18 Å) Sb–Sb bond lengths. In the fifth Sb+1.20- site, Sb+1.20- is bonded in a 7-coordinate geometry to one Dy3+ and six Sb+1.20- atoms. There are one shorter (3.42 Å) and two longer (3.43 Å) Sb–Sb bond lengths. In the sixth Sb+1.20- site, Sb+1.20- is bonded in a 8-coordinate geometry to four Dy3+ and four Sb+1.20- atoms. In the seventh Sb+1.20- site, Sb+1.20- is bonded in a 6-coordinate geometry to three Dy3+ and three Sb+1.20- atoms. In the eighth Sb+1.20- site, Sb+1.20- is bonded in a 8-coordinate geometry to four Dy3+ and four Sb+1.20- atoms. Both Sb–Sb bond lengths are 3.00 Å. In the ninth Sb+1.20- site, Sb+1.20- is bonded to six Dy3+ atoms to form distorted face-sharing SbDy6 pentagonal pyramids. In the tenth Sb+1.20- site, Sb+1.20- is bonded in a 8-coordinate geometry to four Dy3+ and four Sb+1.20- atoms. Both Sb–Sb bond lengths are 3.06 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy4Si2S3O7 by Materials Project

Dy4Si2S3O7 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. there are two inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 9-coordinate geometry to three S2- and six O2- atoms. There are one shorter (2.86 Å) and two longer (2.88 Å) Dy–S bond lengths. There are a spread of Dy–O bond distances ranging from 2.38–2.53 Å. In the second Dy3+ site, Dy3+ is bonded in a 6-coordinate geometry to three S2- and three O2- atoms. There are two shorter (2.77 Å) and one longer (2.80 Å) Dy–S bond lengths. There are one shorter (2.29 Å) and two longer (2.44 Å) Dy–O bond lengths. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one SDy4O2 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 64°. There is three shorter (1.64 Å) and one longer (1.65 Å) Si–O bond length. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted square co-planar geometry to four equivalent Dy3+ and twelve O2- atoms. There are eight shorter (3.17 Å) and four longer (3.21 Å) S–O bond lengths. In the second S2- site, S2- is bonded to four equivalent Dy3+ and two equivalent O2- atoms to form distorted SDy4O2 octahedra that share corners with four equivalent SiO4 tetrahedra and corners with four equivalent ODy3SiS tetrahedra. Both S–O bond lengths are 3.09 Å. In the third S2- site, S2- is bonded in a 12-coordinate geometry to four Dy3+ atoms. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent Si4+ and one S2- atom. In the second O2- site, O2- is bonded to three Dy3+, one Si4+, and one S2- atom to form distorted ODy3SiS tetrahedra that share a cornercorner with one SDy4O2 octahedra, a cornercorner with one ODy3SiS tetrahedra, and edges with two equivalent ODy3SiS tetrahedra. The corner-sharing octahedral tilt angles are 82°. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Dy3+, one Si4+, and one S2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy2Si2O7 by Materials Project

Dy2Si2O7 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are four inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Dy–O bond distances ranging from 2.30–2.70 Å. In the second Dy3+ site, Dy3+ is bonded to six O2- atoms to form distorted DyO6 octahedra that share corners with seven SiO4 tetrahedra. There are a spread of Dy–O bond distances ranging from 2.21–2.41 Å. In the third Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Dy–O bond distances ranging from 2.23–2.87 Å. In the fourth Dy3+ site, Dy3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Dy–O bond distances ranging from 2.26–2.41 Å. There are four inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent DyO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 47–66°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with three equivalent DyO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 64–65°. There are a spread of Si–O bond distances ranging from 1.61–1.67 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one DyO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. There are a spread of Si–O bond distances ranging from 1.62–1.75 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one DyO6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Dy3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three Dy3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two Dy3+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Dy3+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two Dy3+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three Dy3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to three Dy3+ and one Si4+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two Si4+ atoms. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two Dy3+ and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to two Dy3+ and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to two Dy3+ and one Si4+ atom. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Dy3+ and two Si4+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Dy3+ and one Si4+ atom. In the fourteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Dy3+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy2SiSeO4 by Materials Project

Dy2SiSeO4 crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. there are two inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 6-coordinate geometry to two equivalent Se2- and six O2- atoms. Both Dy–Se bond lengths are 3.04 Å. There are a spread of Dy–O bond distances ranging from 2.35–2.44 Å. In the second Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to two equivalent Se2- and six O2- atoms. There are one shorter (2.88 Å) and one longer (2.98 Å) Dy–Se bond lengths. There are a spread of Dy–O bond distances ranging from 2.39–2.54 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.64 Å) and two longer (1.66 Å) Si–O bond length. Se2- is bonded in a 4-coordinate geometry to four Dy3+ atoms. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Dy3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Dy3+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DySn2 by Materials Project

DySn2 is Zirconium Disilicide structured and crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Dy is bonded in a 10-coordinate geometry to ten Sn atoms. There are a spread of Dy–Sn bond distances ranging from 3.16–3.46 Å. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 4-coordinate geometry to six equivalent Dy and two equivalent Sn atoms. Both Sn–Sn bond lengths are 3.06 Å. In the second Sn site, Sn is bonded in a 8-coordinate geometry to four equivalent Dy and four equivalent Sn atoms. All Sn–Sn bond lengths are 3.12 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DyMgIn by Materials Project

MgDyIn crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. Mg is bonded to four In atoms to form a mixture of distorted corner and edge-sharing MgIn4 tetrahedra. There are two shorter (2.92 Å) and two longer (2.97 Å) Mg–In bond lengths. Dy is bonded in a 5-coordinate geometry to five In atoms. There are four shorter (3.23 Å) and one longer (3.27 Å) Dy–In bond lengths. There are two inequivalent In sites. In the first In site, In is bonded in a 9-coordinate geometry to six equivalent Mg and three equivalent Dy atoms. In the second In site, In is bonded in a 9-coordinate geometry to three equivalent Mg and six equivalent Dy atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DyIn5Rh by Materials Project

DyRhIn5 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Dy is bonded to twelve In atoms to form DyIn12 cuboctahedra that share corners with four equivalent DyIn12 cuboctahedra, faces with four equivalent DyIn12 cuboctahedra, and faces with four equivalent InDy4In8 cuboctahedra. There are eight shorter (3.26 Å) and four longer (3.29 Å) Dy–In bond lengths. Rh is bonded in a body-centered cubic geometry to eight equivalent In atoms. All Rh–In bond lengths are 2.77 Å. There are two inequivalent In sites. In the first In site, In is bonded to four equivalent Dy and eight equivalent In atoms to form distorted InDy4In8 cuboctahedra that share corners with four equivalent InDy4In8 cuboctahedra, faces with four equivalent DyIn12 cuboctahedra, and faces with four equivalent InDy4In8 cuboctahedra. All In–In bond lengths are 3.26 Å. In the second In site, In is bonded in a 4-coordinate geometry to two equivalent Dy, two equivalent Rh, and two equivalent In atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DyCo5 by Materials Project

DyCo5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Dy is bonded in a 6-coordinate geometry to eighteen Co atoms. There are six shorter (2.84 Å) and twelve longer (3.15 Å) Dy–Co bond lengths. There are two inequivalent Co sites. In the first Co site, Co is bonded to four equivalent Dy and eight Co atoms to form a mixture of edge, corner, and face-sharing CoDy4Co8 cuboctahedra. There are four shorter (2.43 Å) and four longer (2.46 Å) Co–Co bond lengths. In the second Co site, Co is bonded in a 12-coordinate geometry to three equivalent Dy and six equivalent Co atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DyBr2 by Materials Project

DyBr2 is Baddeleyite-like structured and crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Dy is bonded in a 7-coordinate geometry to seven Br atoms. There are a spread of Dy–Br bond distances ranging from 2.90–3.22 Å. There are two inequivalent Br sites. In the first Br site, Br is bonded to four equivalent Dy atoms to form a mixture of distorted corner and edge-sharing BrDy4 tetrahedra. In the second Br site, Br is bonded in a trigonal planar geometry to three equivalent Dy atoms.

36 MATERIALS SCIENCE↗