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All sourcesNASA NTRSDOE OSTI
DOE OSTI2025

Isolation of Inner-Sphere Aquo Complexes of Samarium(II)

The cis-anti-cis and cis-syn-cis isomers of [Sm(dicyclohexano-18-crown-6)(H 2 O) 2 ]I 2 exhibiting trans water molecules bound to the Sm 2+ ion have been isolated and characterized. Sm 2+ possesses an electrochemical potential sufficient for water reduction, and thus these complexes add to the recent body of evidence that the oxidation of Sm 2+ by water can operate by a mechanism that is not straightforward. These complexes are obtained by the direct addition of stoichiometric amounts of water to solutions of the respective Sm(dicyclohexano-18-crown-6)I 2 isomers under an inert atmosphere. The parent complex, Sm(dicyclohexano-18-crown-6)I 2 , lacking coordinating water molecules can be obtained through rigorous exclusion of water. It was determined that the bulky cyclohexano-substituents deter intramolecular interactions between [Sm(dicyclohexano-18-crown-6)(H 2 O) 2 ]I 2 complexes and slow the oxidization of the metal centers. The extent of the stability of these complexes to the presence of water has been further probed through cyclic voltammetry, where it was found that the redox potential of both isomers of [Sm(dicyclohexano-18-crown-6)(H 2 O) 2 ]I 2 maintains quasi-reversible behavior with a 50,000-fold excess of water to Sm 2+ in solution with the cis-syn-cis complex being quasi-reversible at even higher concentrations of water. Solution-phase spectroscopy of these complexes in acetonitrile shows a corresponding hypsochromic shift of the Sm 2+ 4f → 5d transition typically observed in the visible region from Sm 2+ complexes. Here, the crystalline compounds obtained in this study support solid-state spectroscopic trends observed from other Sm 2+ crown-ether complexes containing iodide counterions, wherein the proximity of the iodide ions to the metal center determines whether the complex can exhibit 4f → 4f photoluminescence.

Crystals↗
DOE OSTI2020

Materials Data on Sm3Sb4Pt7 by Materials Project

Sm3Pt7Sb4 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Sm+2.67+ sites. In the first Sm+2.67+ site, Sm+2.67+ is bonded to six Pt2- atoms to form SmPt6 octahedra that share corners with two equivalent PtSm4Sb2Pt6 cuboctahedra and edges with two equivalent SmPt6 octahedra. There are four shorter (3.25 Å) and two longer (3.34 Å) Sm–Pt bond lengths. In the second Sm+2.67+ site, Sm+2.67+ is bonded in a 8-coordinate geometry to eight Pt2- atoms. There are a spread of Sm–Pt bond distances ranging from 2.94–3.21 Å. There are four inequivalent Pt2- sites. In the first Pt2- site, Pt2- is bonded in a 9-coordinate geometry to four Sm+2.67+, one Pt2-, and four Sb+1.50+ atoms. The Pt–Pt bond length is 2.97 Å. There are a spread of Pt–Sb bond distances ranging from 2.60–2.83 Å. In the second Pt2- site, Pt2- is bonded in a 9-coordinate geometry to three Sm+2.67+, three Pt2-, and three equivalent Sb+1.50+ atoms. All Pt–Pt bond lengths are 2.83 Å. There are two shorter (2.64 Å) and one longer (2.78 Å) Pt–Sb bond lengths. In the third Pt2- site, Pt2- is bonded to four equivalent Sm+2.67+, six Pt2-, and two equivalent Sb+1.50+ atoms to form distorted PtSm4Sb2Pt6 cuboctahedra that share corners with two equivalent SmPt6 octahedra and faces with two equivalent PtSm4Sb2Pt6 cuboctahedra. The corner-sharing octahedral tilt angles are 63°. All Pt–Pt bond lengths are 2.95 Å. Both Pt–Sb bond lengths are 3.04 Å. In the fourth Pt2- site, Pt2- is bonded in a 10-coordinate geometry to two equivalent Sm+2.67+, five Pt2-, and three Sb+1.50+ atoms. There are two shorter (2.72 Å) and one longer (3.00 Å) Pt–Sb bond lengths. There are two inequivalent Sb+1.50+ sites. In the first Sb+1.50+ site, Sb+1.50+ is bonded in a 6-coordinate geometry to six Pt2- atoms. In the second Sb+1.50+ site, Sb+1.50+ is bonded in a 5-coordinate geometry to five Pt2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm9Ga4 by Materials Project

Sm9Ga4 crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. there are three inequivalent Sm sites. In the first Sm site, Sm is bonded in a square co-planar geometry to four equivalent Ga atoms. All Sm–Ga bond lengths are 3.08 Å. In the second Sm site, Sm is bonded in a 1-coordinate geometry to four equivalent Ga atoms. There are a spread of Sm–Ga bond distances ranging from 3.02–3.54 Å. In the third Sm site, Sm is bonded in a 3-coordinate geometry to five equivalent Ga atoms. There are three shorter (3.07 Å) and two longer (3.74 Å) Sm–Ga bond lengths. Ga is bonded in a 10-coordinate geometry to ten Sm atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm5Si3O13 by Materials Project

Sm5Si3O13 crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. there are two inequivalent Sm+2.80+ sites. In the first Sm+2.80+ site, Sm+2.80+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sm–O bond distances ranging from 2.42–2.85 Å. In the second Sm+2.80+ site, Sm+2.80+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sm–O bond distances ranging from 2.26–2.71 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.64 Å) and three longer (1.65 Å) Si–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to three equivalent Sm+2.80+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Sm+2.80+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Sm+2.80+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three Sm+2.80+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3Rh2 by Materials Project

Sm3Rh2 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are three inequivalent Sm sites. In the first Sm site, Sm is bonded in a 5-coordinate geometry to five equivalent Rh atoms. There are a spread of Sm–Rh bond distances ranging from 2.88–3.29 Å. In the second Sm site, Sm is bonded in an octahedral geometry to six equivalent Rh atoms. All Sm–Rh bond lengths are 3.02 Å. In the third Sm site, Sm is bonded in a 6-coordinate geometry to six equivalent Rh atoms. There are three shorter (2.90 Å) and three longer (3.11 Å) Sm–Rh bond lengths. Rh is bonded in a 8-coordinate geometry to eight Sm atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SmSi3Rh5 by Materials Project

SmRh5Si3 crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. Sm is bonded in a 12-coordinate geometry to twelve Rh and six Si atoms. There are a spread of Sm–Rh bond distances ranging from 3.09–3.52 Å. There are a spread of Sm–Si bond distances ranging from 3.09–3.13 Å. There are five inequivalent Rh sites. In the first Rh site, Rh is bonded in a distorted trigonal non-coplanar geometry to one Sm and three equivalent Si atoms. There are one shorter (2.34 Å) and two longer (2.50 Å) Rh–Si bond lengths. In the second Rh site, Rh is bonded in a 4-coordinate geometry to three equivalent Sm and four Si atoms. There are two shorter (2.42 Å) and two longer (2.49 Å) Rh–Si bond lengths. In the third Rh site, Rh is bonded in a 4-coordinate geometry to three equivalent Sm and four Si atoms. There are a spread of Rh–Si bond distances ranging from 2.42–2.50 Å. In the fourth Rh site, Rh is bonded in a 4-coordinate geometry to three equivalent Sm and four Si atoms. There are a spread of Rh–Si bond distances ranging from 2.43–2.51 Å. In the fifth Rh site, Rh is bonded in a 5-coordinate geometry to two equivalent Sm and five Si atoms. There are a spread of Rh–Si bond distances ranging from 2.37–2.53 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a 10-coordinate geometry to two equivalent Sm and six Rh atoms. In the second Si site, Si is bonded in a 9-coordinate geometry to two equivalent Sm and seven Rh atoms. In the third Si site, Si is bonded in a 9-coordinate geometry to two equivalent Sm and seven Rh atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3(Ge2Ru)2 by Materials Project

Sm3Ru2Ge4 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded in a 6-coordinate geometry to eight Ge atoms. There are a spread of Sm–Ge bond distances ranging from 3.12–3.42 Å. In the second Sm site, Sm is bonded in a 11-coordinate geometry to four equivalent Ru and seven Ge atoms. There are a spread of Sm–Ru bond distances ranging from 3.10–3.22 Å. There are a spread of Sm–Ge bond distances ranging from 3.01–3.23 Å. Ru is bonded in a 4-coordinate geometry to four equivalent Sm and four Ge atoms. There are three shorter (2.45 Å) and one longer (2.53 Å) Ru–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 6-coordinate geometry to six Sm, one Ru, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.81 Å. In the second Ge site, Ge is bonded in a 10-coordinate geometry to five Sm and three equivalent Ru atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3(CoGe2)2 by Materials Project

Sm3(CoGe2)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded in a 12-coordinate geometry to four equivalent Co and eight Ge atoms. There are a spread of Sm–Co bond distances ranging from 2.97–3.32 Å. There are a spread of Sm–Ge bond distances ranging from 3.02–3.33 Å. In the second Sm site, Sm is bonded in a 6-coordinate geometry to eight Ge atoms. There are a spread of Sm–Ge bond distances ranging from 3.04–3.43 Å. Co is bonded in a 4-coordinate geometry to four equivalent Sm and four Ge atoms. There are a spread of Co–Ge bond distances ranging from 2.35–2.42 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 6-coordinate geometry to six Sm, one Co, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.76 Å. In the second Ge site, Ge is bonded in a 9-coordinate geometry to six Sm and three equivalent Co atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm8CrTe13Cl by Materials Project

Sm8CrTe13Cl crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. there are eight inequivalent Sm3+ sites. In the first Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to eight Te2- atoms. There are a spread of Sm–Te bond distances ranging from 3.17–3.54 Å. In the second Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to eight Te2- atoms. There are a spread of Sm–Te bond distances ranging from 3.17–3.47 Å. In the third Sm3+ site, Sm3+ is bonded to seven Te2- atoms to form distorted SmTe7 pentagonal bipyramids that share corners with two equivalent CrTe6 octahedra and edges with two equivalent SmTe7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. There are a spread of Sm–Te bond distances ranging from 3.13–3.23 Å. In the fourth Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to seven Te2- and one Cl1- atom. There are a spread of Sm–Te bond distances ranging from 3.19–3.37 Å. The Sm–Cl bond length is 3.25 Å. In the fifth Sm3+ site, Sm3+ is bonded in a 2-coordinate geometry to six Te2- and two equivalent Cl1- atoms. There are a spread of Sm–Te bond distances ranging from 3.23–3.38 Å. Both Sm–Cl bond lengths are 2.82 Å. In the sixth Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to eight Te2- atoms. There are a spread of Sm–Te bond distances ranging from 3.16–3.58 Å. In the seventh Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to seven Te2- and one Cl1- atom. There are a spread of Sm–Te bond distances ranging from 3.15–3.24 Å. The Sm–Cl bond length is 3.05 Å. In the eighth Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to eight Te2- atoms. There are a spread of Sm–Te bond distances ranging from 3.17–3.64 Å. Cr3+ is bonded to six Te2- atoms to form CrTe6 octahedra that share corners with two equivalent SmTe7 pentagonal bipyramids and edges with two equivalent CrTe6 octahedra. There are a spread of Cr–Te bond distances ranging from 2.73–2.76 Å. There are thirteen inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a 5-coordinate geometry to three Sm3+ and two equivalent Cr3+ atoms. In the second Te2- site, Te2- is bonded in a 7-coordinate geometry to five Sm3+ and two equivalent Cl1- atoms. Both Te–Cl bond lengths are 3.56 Å. In the third Te2- site, Te2- is bonded in a 5-coordinate geometry to five Sm3+ atoms. In the fourth Te2- site, Te2- is bonded in a 5-coordinate geometry to five Sm3+ atoms. In the fifth Te2- site, Te2- is bonded to three Sm3+ and two equivalent Cr3+ atoms to form distorted corner-sharing TeSm3Cr2 trigonal bipyramids. In the sixth Te2- site, Te2- is bonded in a 5-coordinate geometry to five Sm3+ atoms. In the seventh Te2- site, Te2- is bonded in a 5-coordinate geometry to five Sm3+ atoms. In the eighth Te2- site, Te2- is bonded in a 5-coordinate geometry to five Sm3+ and two equivalent Cl1- atoms. Both Te–Cl bond lengths are 3.56 Å. In the ninth Te2- site, Te2- is bonded in a 5-coordinate geometry to five Sm3+ atoms. In the tenth Te2- site, Te2- is bonded in a 5-coordinate geometry to five Sm3+ atoms. In the eleventh Te2- site, Te2- is bonded in a 5-coordinate geometry to four Sm3+ and one Cr3+ atom. In the twelfth Te2- site, Te2- is bonded in a 7-coordinate geometry to five Sm3+ and two equivalent Cl1- atoms. Both Te–Cl bond lengths are 3.57 Å. In the thirteenth Te2- site, Te2- is bonded in a 5-coordinate geometry to four Sm3+ and one Cr3+ atom. Cl1- is bonded in a 4-coordinate geometry to four Sm3+ and six Te2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm5Co2 by Materials Project

Co2Sm5 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent Sm sites. In the first Sm site, Sm is bonded in a 2-coordinate geometry to three equivalent Co atoms. There are a spread of Sm–Co bond distances ranging from 2.76–3.22 Å. In the second Sm site, Sm is bonded to four equivalent Co atoms to form distorted edge-sharing SmCo4 tetrahedra. There are two shorter (2.89 Å) and two longer (2.93 Å) Sm–Co bond lengths. In the third Sm site, Sm is bonded in a distorted bent 150 degrees geometry to two equivalent Co atoms. There are one shorter (2.71 Å) and one longer (2.78 Å) Sm–Co bond lengths. Co is bonded in a 7-coordinate geometry to seven Sm atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm11Y5O24 by Materials Project

Sm11Y5O24 is Spinel-like structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eleven inequivalent Sm3+ sites. In the first Sm3+ site, Sm3+ is bonded to six O2- atoms to form SmO6 octahedra that share corners with two YO6 octahedra, corners with four SmO6 octahedra, edges with three SmO6 octahedra, and edges with three YO6 octahedra. The corner-sharing octahedra tilt angles range from 55–58°. There are a spread of Sm–O bond distances ranging from 2.35–2.37 Å. In the second Sm3+ site, Sm3+ is bonded to six O2- atoms to form distorted SmO6 octahedra that share a cornercorner with one YO6 octahedra, corners with five SmO6 octahedra, edges with three SmO6 octahedra, and edges with three YO6 octahedra. The corner-sharing octahedra tilt angles range from 54–57°. There are a spread of Sm–O bond distances ranging from 2.32–2.44 Å. In the third Sm3+ site, Sm3+ is bonded to six O2- atoms to form SmO6 octahedra that share corners with three SmO6 octahedra, corners with three YO6 octahedra, edges with two YO6 octahedra, and edges with four SmO6 octahedra. The corner-sharing octahedra tilt angles range from 55–59°. There are a spread of Sm–O bond distances ranging from 2.35–2.37 Å. In the fourth Sm3+ site, Sm3+ is bonded to six O2- atoms to form SmO6 octahedra that share corners with three SmO6 octahedra, corners with three YO6 octahedra, edges with two YO6 octahedra, and edges with four SmO6 octahedra. The corner-sharing octahedra tilt angles range from 55–59°. There are a spread of Sm–O bond distances ranging from 2.35–2.37 Å. In the fifth Sm3+ site, Sm3+ is bonded to six O2- atoms to form SmO6 octahedra that share corners with two YO6 octahedra, corners with four SmO6 octahedra, edges with three SmO6 octahedra, and edges with three YO6 octahedra. The corner-sharing octahedra tilt angles range from 55–58°. There are a spread of Sm–O bond distances ranging from 2.35–2.38 Å. In the sixth Sm3+ site, Sm3+ is bonded to six O2- atoms to form distorted SmO6 octahedra that share corners with six SmO6 octahedra, edges with three SmO6 octahedra, and edges with three YO6 octahedra. The corner-sharing octahedra tilt angles range from 55–56°. There are a spread of Sm–O bond distances ranging from 2.33–2.43 Å. In the seventh Sm3+ site, Sm3+ is bonded to six O2- atoms to form distorted SmO6 octahedra that share corners with three SmO6 octahedra, corners with three YO6 octahedra, an edgeedge with one YO6 octahedra, and edges with five SmO6 octahedra. The corner-sharing octahedra tilt angles range from 53–58°. There are a spread of Sm–O bond distances ranging from 2.32–2.43 Å. In the eighth Sm3+ site, Sm3+ is bonded to six O2- atoms to form distorted SmO6 octahedra that share a cornercorner with one YO6 octahedra, corners with five SmO6 octahedra, edges with three SmO6 octahedra, and edges with three YO6 octahedra. The corner-sharing octahedra tilt angles range from 54–57°. There are a spread of Sm–O bond distances ranging from 2.32–2.43 Å. In the ninth Sm3+ site, Sm3+ is bonded to six O2- atoms to form distorted SmO6 octahedra that share a cornercorner with one YO6 octahedra, corners with five SmO6 octahedra, edges with two YO6 octahedra, and edges with four SmO6 octahedra. The corner-sharing octahedra tilt angles range from 54–57°. There are a spread of Sm–O bond distances ranging from 2.32–2.42 Å. In the tenth Sm3+ site, Sm3+ is bonded to six O2- atoms to form distorted SmO6 octahedra that share a cornercorner with one YO6 octahedra, corners with five SmO6 octahedra, edges with two YO6 octahedra, and edges with four SmO6 octahedra. The corner-sharing octahedra tilt angles range from 55–57°. There are a spread of Sm–O bond distances ranging from 2.33–2.42 Å. In the eleventh Sm3+ site, Sm3+ is bonded to six O2- atoms to form distorted SmO6 octahedra that share corners with three SmO6 octahedra, corners with three YO6 octahedra, and edges with six SmO6 octahedra. The corner-sharing octahedra tilt angles range from 53–59°. There are a spread of Sm–O bond distances ranging from 2.32–2.42 Å. There are five inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded to six O2- atoms to form distorted YO6 octahedra that share corners with six SmO6 octahedra, edges with three SmO6 octahedra, and edges with three YO6 octahedra. The corner-sharing octahedra tilt angles range from 54–55°. There are a spread of Y–O bond distances ranging from 2.29–2.38 Å. In the second Y3+ site, Y3+ is bonded to six O2- atoms to form distorted YO6 octahedra that share corners with two YO6 octahedra, corners with four SmO6 octahedra, an edgeedge with one YO6 octahedra, and edges with five SmO6 octahedra. The corner-sharing octahedra tilt angles range from 52–58°. There are a spread of Y–O bond distances ranging from 2.28–2.38 Å. In the third Y3+ site, Y3+ is bonded to six O2- atoms to form distorted YO6 octahedra that share corners with two YO6 octahedra, corners with four SmO6 octahedra, an edgeedge with one YO6 octahedra, and edges with five SmO6 octahedra. The corner-sharing octahedra tilt angles range from 52–58°. There are a spread of Y–O bond distances ranging from 2.28–2.39 Å. In the fourth Y3+ site, Y3+ is bonded to six O2- atoms to form distorted YO6 octahedra that share corners with three SmO6 octahedra, corners with three YO6 octahedra, an edgeedge with one YO6 octahedra, and edges with five SmO6 octahedra. The corner-sharing octahedra tilt angles range from 52–57°. There are a spread of Y–O bond distances ranging from 2.28–2.37 Å. In the fifth Y3+ site, Y3+ is bonded to six O2- atoms to form distorted YO6 octahedra that share corners with three SmO6 octahedra, corners with three YO6 octahedra, and edges with six SmO6 octahedra. The corner-sharing octahedra tilt angles range from 52–59°. There are a spread of Y–O bond distances ranging from 2.28–2.37 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y tetrahedra that share corners with five OSm3Y tetrahedra, corners with seven OSmY3 trigonal pyramids, and edges with four OSm3Y trigonal pyramids. In the second O2- site, O2- is bonded to two Sm3+ and two Y3+ atoms to form distorted OSm2Y2 trigonal pyramids that share corners with five OSm3Y tetrahedra, corners with seven OSm4 trigonal pyramids, an edgeedge with one OSm2Y2 tetrahedra, and edges with three OSm3Y trigonal pyramids. In the third O2- site, O2- is bonded to two Sm3+ and two Y3+ atoms to form distorted OSm2Y2 tetrahedra that share corners with two OSm3Y tetrahedra, corners with ten OSm3Y trigonal pyramids, and edges with four OSm2Y2 trigonal pyramids. In the fourth O2- site, O2- is bonded to four Sm3+ atoms to form distorted OSm4 trigonal pyramids that share corners with five OSm3Y tetrahedra, corners with seven OSmY3 trigonal pyramids, and edges with four OSm3Y trigonal pyramids. In the fifth O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y tetrahedra that share corners with four OSm3Y tetrahedra, corners with eight OSm3Y trigonal pyramids, and edges with four OSm2Y2 trigonal pyramids. In the sixth O2- site, O2- is bonded to two Sm3+ and two Y3+ atoms to form distorted OSm2Y2 trigonal pyramids that share corners with two OSm3Y tetrahedra, corners with ten OSm2Y2 trigonal pyramids, and edges with four OSm2Y2 tetrahedra. In the seventh O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y tetrahedra that share corners with five OSm3Y tetrahedra, corners with seven OSm2Y2 trigonal pyramids, and edges with four OSm3Y trigonal pyramids. In the eighth O2- site, O2- is bonded to two Sm3+ and two Y3+ atoms to form distorted OSm2Y2 trigonal pyramids that share corners with four OSm3Y tetrahedra, corners with eight OSm3Y trigonal pyramids, an edgeedge with one OSm2Y2 tetrahedra, and edges with three OSm2Y2 trigonal pyramids. In the ninth O2- site, O2- is bonded to two Sm3+ and two Y3+ atoms to form distorted OSm2Y2 tetrahedra that share corners with five OSm3Y tetrahedra, corners with seven OSm2Y2 trigonal pyramids, and edges with four OSm3Y trigonal pyramids. In the tenth O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y tetrahedra that share corners with four OSm3Y tetrahedra, corners with eight OSm3Y trigonal pyramids, and edges with four OSm2Y2 trigonal pyramids. In the eleventh O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y trigonal pyramids that share corners with two OSm3Y tetrahedra, corners with ten OSm2Y2 trigonal pyramids, edges with two OSm3Y tetrahedra, and edges with two OSm2Y2 trigonal pyramids. In the twelfth O2- site, O2- is bonded to two Sm3+ and two Y3+ atoms to form distorted OSm2Y2 trigonal pyramids that share corners with two OSm3Y tetrahedra, corners with ten OSm2Y2 trigonal pyramids, edges with two OSm3Y tetrahedra, and edges with two OSm4 trigonal pyramids. In the thirteenth O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y trigonal pyramids that share corners with five OSm3Y tetrahedra, corners with seven OSmY3 trigonal pyramids, an edgeedge with one OSm2Y2 tetrahedra, and edges with three OSm2Y2 trigonal pyramids. In the fourteenth O2- site, O2- is bonded to four Sm3+ atoms to form distorted OSm4 trigonal pyramids that share corners with five OSm3Y tetrahedra, corners with seven OSm4 trigonal pyramids, an edgeedge with one OSm2Y2 tetrahedra, and edges with three OSm3Y trigonal pyramids. In the fifteenth O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y trigonal pyramids that share corners with two OSm3Y tetrahedra, corners with ten OSm3Y trigonal pyramids, edges with two OSm3Y tetrahedra, and edges with two OSm4 trigonal pyramids. In the sixteenth O2- site, O2- is bonded to two Sm3+ and two Y3+ atoms to form distorted OSm2Y2 trigonal pyramids that share corners with three OSm2Y2 tetrahedra, corners with nine OSm2Y2 trigonal pyramids, edges with two OSm3Y tetrahedra, and edges with two OSm4 trigonal pyramids. In the seventeenth O2- site, O2- is bonded to two Sm3+ and two Y3+ atoms to form a mixture of distorted edge and corner-sharing OSm2Y2 trigonal pyramids. In the eighteenth O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y trigonal pyramids that share corners with three OSm2Y2 tetrahedra, corners with nine OSm2Y2 trigonal pyramids, an edgeedge with one OSm2Y2 tetrahedra, and edges with three OSm4 trigonal pyramids. In the nineteenth O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y trigonal pyramids that share corners with three OSm2Y2 tetrahedra, corners with nine OSm2Y2 trigonal pyramids, edges with two OSm3Y tetrahedra, and edges with two OSm3Y trigonal pyramids. In the twentieth O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y tetrahedra that share corners with five OSm3Y tetrahedra, corners with seven OSm4 trigonal pyramids, and edges with four OSm2Y2 trigonal pyramids. In the twenty-first O2- site, O2- is bonded to one Sm3+ and three Y3+ atoms to form distorted OSmY3 trigonal pyramids that share corners with two OSm3Y tetrahedra, corners with ten OSm2Y2 trigonal pyramids, edges with two OSm2Y2 tetrahedra, and edges with two OSm2Y2 trigonal pyramids. In the twenty-second O2- site, O2- is bonded to four Sm3+ atoms to form distorted OSm4 trigonal pyramids that share corners with five OSm3Y tetrahedra, corners with seven OSm2Y2 trigonal pyramids, and edges with four OSm3Y trigonal pyramids. In the twenty-third O2- site, O2- is bonded to three Sm3+ and one Y3+ atom to form distorted OSm3Y trigonal pyramids that share corners with two OSm3Y tetrahedra, corners with ten OSm2Y2 trigonal pyramids, edges with three OSm2Y2 tetrahedra, and an edgeedge with one OSm4 trigonal pyramid. In the twenty-fourth O2- site, O2- is bonded to four Sm3+ atoms to form distorted OSm4 trigonal pyr

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3Ho by Materials Project

HoSm3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ho is bonded to twelve Sm atoms to form HoSm12 cuboctahedra that share corners with four equivalent HoSm12 cuboctahedra, corners with eight equivalent SmSm8Ho4 cuboctahedra, edges with eight equivalent HoSm12 cuboctahedra, edges with sixteen equivalent SmSm8Ho4 cuboctahedra, faces with four equivalent HoSm12 cuboctahedra, and faces with fourteen SmSm8Ho4 cuboctahedra. All Ho–Sm bond lengths are 3.60 Å. There are two inequivalent Sm sites. In the first Sm site, Sm is bonded to four equivalent Ho and eight Sm atoms to form SmSm8Ho4 cuboctahedra that share corners with twelve equivalent SmSm8Ho4 cuboctahedra, edges with eight equivalent HoSm12 cuboctahedra, edges with sixteen SmSm8Ho4 cuboctahedra, faces with four equivalent HoSm12 cuboctahedra, and faces with fourteen SmSm8Ho4 cuboctahedra. All Sm–Sm bond lengths are 3.60 Å. In the second Sm site, Sm is bonded to four equivalent Ho and eight equivalent Sm atoms to form SmSm8Ho4 cuboctahedra that share corners with four equivalent SmSm8Ho4 cuboctahedra, corners with eight equivalent HoSm12 cuboctahedra, edges with twenty-four SmSm8Ho4 cuboctahedra, faces with six equivalent HoSm12 cuboctahedra, and faces with twelve SmSm8Ho4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3Dy by Materials Project

DySm3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Dy is bonded to twelve Sm atoms to form DySm12 cuboctahedra that share corners with four equivalent DySm12 cuboctahedra, corners with eight equivalent SmSm8Dy4 cuboctahedra, edges with eight equivalent DySm12 cuboctahedra, edges with sixteen equivalent SmSm8Dy4 cuboctahedra, faces with four equivalent DySm12 cuboctahedra, and faces with fourteen SmSm8Dy4 cuboctahedra. All Dy–Sm bond lengths are 3.60 Å. There are two inequivalent Sm sites. In the first Sm site, Sm is bonded to four equivalent Dy and eight Sm atoms to form SmSm8Dy4 cuboctahedra that share corners with twelve equivalent SmSm8Dy4 cuboctahedra, edges with eight equivalent DySm12 cuboctahedra, edges with sixteen SmSm8Dy4 cuboctahedra, faces with four equivalent DySm12 cuboctahedra, and faces with fourteen SmSm8Dy4 cuboctahedra. All Sm–Sm bond lengths are 3.60 Å. In the second Sm site, Sm is bonded to four equivalent Dy and eight equivalent Sm atoms to form SmSm8Dy4 cuboctahedra that share corners with four equivalent SmSm8Dy4 cuboctahedra, corners with eight equivalent DySm12 cuboctahedra, edges with twenty-four SmSm8Dy4 cuboctahedra, faces with six equivalent DySm12 cuboctahedra, and faces with twelve SmSm8Dy4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3Tm by Materials Project

TmSm3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tm is bonded to twelve Sm atoms to form TmSm12 cuboctahedra that share corners with four equivalent TmSm12 cuboctahedra, corners with eight equivalent SmSm8Tm4 cuboctahedra, edges with eight equivalent TmSm12 cuboctahedra, edges with sixteen equivalent SmSm8Tm4 cuboctahedra, faces with four equivalent TmSm12 cuboctahedra, and faces with fourteen SmSm8Tm4 cuboctahedra. All Tm–Sm bond lengths are 3.61 Å. There are two inequivalent Sm sites. In the first Sm site, Sm is bonded to four equivalent Tm and eight Sm atoms to form SmSm8Tm4 cuboctahedra that share corners with twelve equivalent SmSm8Tm4 cuboctahedra, edges with eight equivalent TmSm12 cuboctahedra, edges with sixteen SmSm8Tm4 cuboctahedra, faces with four equivalent TmSm12 cuboctahedra, and faces with fourteen SmSm8Tm4 cuboctahedra. All Sm–Sm bond lengths are 3.61 Å. In the second Sm site, Sm is bonded to four equivalent Tm and eight equivalent Sm atoms to form SmSm8Tm4 cuboctahedra that share corners with four equivalent SmSm8Tm4 cuboctahedra, corners with eight equivalent TmSm12 cuboctahedra, edges with twenty-four SmSm8Tm4 cuboctahedra, faces with six equivalent TmSm12 cuboctahedra, and faces with twelve SmSm8Tm4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YbSm3 by Materials Project

YbSm3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Yb is bonded to twelve Sm atoms to form YbSm12 cuboctahedra that share corners with four equivalent YbSm12 cuboctahedra, corners with eight equivalent SmYb4Sm8 cuboctahedra, edges with eight equivalent YbSm12 cuboctahedra, edges with sixteen equivalent SmYb4Sm8 cuboctahedra, faces with four equivalent YbSm12 cuboctahedra, and faces with fourteen SmYb4Sm8 cuboctahedra. There are four shorter (3.65 Å) and eight longer (3.66 Å) Yb–Sm bond lengths. There are two inequivalent Sm sites. In the first Sm site, Sm is bonded to four equivalent Yb and eight Sm atoms to form SmYb4Sm8 cuboctahedra that share corners with twelve equivalent SmYb4Sm8 cuboctahedra, edges with eight equivalent YbSm12 cuboctahedra, edges with sixteen SmYb4Sm8 cuboctahedra, faces with four equivalent YbSm12 cuboctahedra, and faces with fourteen SmYb4Sm8 cuboctahedra. There are four shorter (3.65 Å) and four longer (3.66 Å) Sm–Sm bond lengths. In the second Sm site, Sm is bonded to four equivalent Yb and eight equivalent Sm atoms to form SmYb4Sm8 cuboctahedra that share corners with four equivalent SmYb4Sm8 cuboctahedra, corners with eight equivalent YbSm12 cuboctahedra, edges with twenty-four SmYb4Sm8 cuboctahedra, faces with six equivalent YbSm12 cuboctahedra, and faces with twelve SmYb4Sm8 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AcSm3 by Materials Project

AcSm3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ac is bonded to twelve Sm atoms to form AcSm12 cuboctahedra that share corners with four equivalent AcSm12 cuboctahedra, corners with eight equivalent SmAc4Sm8 cuboctahedra, edges with eight equivalent AcSm12 cuboctahedra, edges with sixteen equivalent SmAc4Sm8 cuboctahedra, faces with four equivalent AcSm12 cuboctahedra, and faces with fourteen SmAc4Sm8 cuboctahedra. There are four shorter (3.71 Å) and eight longer (3.72 Å) Ac–Sm bond lengths. There are two inequivalent Sm sites. In the first Sm site, Sm is bonded to four equivalent Ac and eight Sm atoms to form SmAc4Sm8 cuboctahedra that share corners with twelve equivalent SmAc4Sm8 cuboctahedra, edges with eight equivalent AcSm12 cuboctahedra, edges with sixteen SmAc4Sm8 cuboctahedra, faces with four equivalent AcSm12 cuboctahedra, and faces with fourteen SmAc4Sm8 cuboctahedra. There are four shorter (3.71 Å) and four longer (3.72 Å) Sm–Sm bond lengths. In the second Sm site, Sm is bonded to four equivalent Ac and eight equivalent Sm atoms to form SmAc4Sm8 cuboctahedra that share corners with four equivalent SmAc4Sm8 cuboctahedra, corners with eight equivalent AcSm12 cuboctahedra, edges with twenty-four SmAc4Sm8 cuboctahedra, faces with six equivalent AcSm12 cuboctahedra, and faces with twelve SmAc4Sm8 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3(P3Pd10)2 by Materials Project

Sm3(Pd10P3)2 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded to sixteen Pd atoms to form distorted SmPd16 tetrahedra that share edges with six equivalent SmPd16 tetrahedra and faces with four equivalent SmP6Pd12 cuboctahedra. There are four shorter (2.90 Å) and twelve longer (3.36 Å) Sm–Pd bond lengths. In the second Sm site, Sm is bonded to twelve equivalent Pd and six equivalent P atoms to form distorted face-sharing SmP6Pd12 cuboctahedra. All Sm–Pd bond lengths are 3.03 Å. All Sm–P bond lengths are 3.23 Å. There are two inequivalent Pd sites. In the first Pd site, Pd is bonded in a 4-coordinate geometry to one Sm, six equivalent Pd, and three equivalent P atoms. All Pd–Pd bond lengths are 3.06 Å. All Pd–P bond lengths are 2.51 Å. In the second Pd site, Pd is bonded in a 6-coordinate geometry to three Sm, nine Pd, and two equivalent P atoms. There are one shorter (2.67 Å) and four longer (3.03 Å) Pd–Pd bond lengths. Both Pd–P bond lengths are 2.40 Å. P is bonded in a 9-coordinate geometry to one Sm and eight Pd atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3GaCo3 by Materials Project

Sm3Co3Ga crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded in a 2-coordinate geometry to six Co atoms. There are a spread of Sm–Co bond distances ranging from 2.77–3.21 Å. In the second Sm site, Sm is bonded in a 9-coordinate geometry to seven Co and two equivalent Ga atoms. There are a spread of Sm–Co bond distances ranging from 2.90–3.20 Å. Both Sm–Ga bond lengths are 3.26 Å. There are two inequivalent Co sites. In the first Co site, Co is bonded in a 9-coordinate geometry to six Sm, one Co, and two equivalent Ga atoms. The Co–Co bond length is 2.50 Å. Both Co–Ga bond lengths are 2.41 Å. In the second Co site, Co is bonded in a 9-coordinate geometry to seven Sm and two equivalent Co atoms. Ga is bonded in a 12-coordinate geometry to two equivalent Sm and four equivalent Co atoms.

36 MATERIALS SCIENCE↗