Synthesis and Characterization of ScMGa₅ (M = Fe, Co, Ni) and Yb₁₋ₓScₓCoGa₅ (0 ≤ x ≤ 1)

dc.contributor.advisorFerraris, John P.
dc.contributor.advisorNielsen, Steven O.
dc.creatorGreen, Lance M
dc.date.accessioned2020-09-23T18:31:21Z
dc.date.available2020-09-23T18:31:21Z
dc.date.created2020-08
dc.date.issued2020-08
dc.date.submittedAugust 2020
dc.date.updated2020-09-23T18:31:22Z
dc.description.abstractThe crystal structures of ScMGa5 (M = Fe, Co, Ni) have been determined by single crystal X-ray diffraction for crystals grown from a gallium self-flux. The synthesis and characterization of Yb₁₋ₓScxCoGa₅ (0 ≤ x ≤ 1) is first reported here. ScMGa₅ (M = Fe, Co, Ni) adopts the HoCoGa5-structure type and crystallizes in the tetragonal space group P4/mmm (No. 123), Z = 1, a = 4.1367(7) Å and c = 6.6422(17) Å for ScFeGa₅, a = 4.1290(11) Å and c = 6.6034(16) Å for ScCoGa₅, and a = 4.1466(6) Å and c = 6.492(2) Å for ScNiGa₅. As the transition metal atomic size increases, from Ni to Fe, the volume of the unit cell increases from 111.63(5) ų to 113.66(4) ų. The compounds consist of alternating MGa₂ edgesharing rectangular prisms interweaved with face-sharing cuboctahedra of ScGa₃ that stack in the [001] direction. ScMGa₅ (M = Fe, Co, Ni) can be structurally compared to materials adopting the AuCu₃-structure type. Yb₁₋ₓScₓCoGa₅ (0 ≤ x ≤ 1) also adopts the HoCoGa₅-structure type and crystallizes in the tetragonal space group P4/mmm. The volume of the unit cell decreases linearly with increasing Sc concentration. Inhomogeneity was found to be maximized when the nominal molar ratios of Yb and Sc were equal.
dc.description.sponsorshipNSM-DMR-1360863
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10735.1/8922
dc.language.isoen
dc.rights©2020 Lance Michael Green. All rights reserved.
dc.subjectIntermetallic compounds
dc.subjectCrystals -- Synthesis
dc.subjectInorganic compounds -- Synthesis
dc.subjectChemistry, Inorganic
dc.titleSynthesis and Characterization of ScMGa₅ (M = Fe, Co, Ni) and Yb₁₋ₓScₓCoGa₅ (0 ≤ x ≤ 1)
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentChemistry
thesis.degree.grantorThe University of Texas at Dallas
thesis.degree.levelMasters
thesis.degree.nameMS

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