Quaternary intermetallics RE2Pt3Ga4In (RE=Y, Gd-Tm) – intergrowth structures of NdRh2Sn4 and TiNiSi related slabs
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Myroslava Horiacha
Abstract
The quaternary gallium-rich intermetallic phases RE2Pt3Ga4In with RE = Y and Gd-Tm were synthesized by arc-melting of the elements and subsequent annealing. Small single crystals were obtained by high-frequency annealing of the samples in sealed tantalum ampoules. The polycrystalline samples were characterized through their X-ray powder patterns. The RE2Pt3Ga4In phases crystallize with a site ordering variant of the orthorhombic Y2Rh3Sn5 type, space group Cmc 21. The structures of Gd2Pt3Ga4In, Dy2Pt3Ga4.14In0.86, Er2Pt3Ga4.17In0.83 and Tm2Pt3Ga4.21In0.79 were refined from single-crystal X-ray diffraction data. The single crystals reveal small homogeneity ranges RE2Pt3Ga4±xIn1±x. The striking geometrical structural building units are slightly distorted trigonal prisms around the three crystallographically independent platinum atoms: Pt1@RE4Ga2, Pt2@RE2Ga4 and Pt3@RE2Ga2In2. Based on these prismatic building units, the RE2Pt3Ga4In structures can be described as intergrowth variants of TiNiSi and NdRh2Sn4 related structural slabs. Temperature dependent magnetic susceptibility studies of Gd2Pt3Ga4In and Tb2Pt3Ga4In show Curie-Weiss behavior and the experimental magnetic moments confirm stable trivalent gadolinium respectively terbium. Gd2Pt3Ga4In and Tb2Pt3Ga4In order antiferromagnetically at TN = 15.8(1) and 26.0(1) K. Magnetization curves at 3 K show field-induced spin reorientations.
Acknowledgements
The research stay of MH in Münster was supported by the Deutscher Akademischer Austauschdienst.
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©2020 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Graphical Synopsis
- Inorganic Crystal Structures
- Crystallographic orientation of ilmenite inclusions in amphibole – an electron backscatter diffraction study
- Quaternary intermetallics RE2Pt3Ga4In (RE=Y, Gd-Tm) – intergrowth structures of NdRh2Sn4 and TiNiSi related slabs
- Impact of the production method and diagnostics conditions on the compositions and structure of nanodimensional anatase
- Alkaline earth metal ordering in CaCu9Mg2 and SrCu9Mg2
- Elucidating the physical properties of the molybdenum oxide Mo4O11 and its tantalum substituted variant Mo2Ta2O11
- Coordination sequences of 2-uniform graphs
- Silicate-germanate K2Y[(Si3Ge)O10(OH)] with unusual complex corrugated layer and its correlation to ring silicate gerenite and chain silicate chkalovite
- Letter
- On the 80th birthday of Professor (retired) Dr. Dr. h.c. Peter Paufler
Articles in the same Issue
- Frontmatter
- Graphical Synopsis
- Inorganic Crystal Structures
- Crystallographic orientation of ilmenite inclusions in amphibole – an electron backscatter diffraction study
- Quaternary intermetallics RE2Pt3Ga4In (RE=Y, Gd-Tm) – intergrowth structures of NdRh2Sn4 and TiNiSi related slabs
- Impact of the production method and diagnostics conditions on the compositions and structure of nanodimensional anatase
- Alkaline earth metal ordering in CaCu9Mg2 and SrCu9Mg2
- Elucidating the physical properties of the molybdenum oxide Mo4O11 and its tantalum substituted variant Mo2Ta2O11
- Coordination sequences of 2-uniform graphs
- Silicate-germanate K2Y[(Si3Ge)O10(OH)] with unusual complex corrugated layer and its correlation to ring silicate gerenite and chain silicate chkalovite
- Letter
- On the 80th birthday of Professor (retired) Dr. Dr. h.c. Peter Paufler
