The crystal structures of m,o-Ce3Pt4Sn6 and Ce1-xPt6Al13+2x

Werner Paschinger, Kunio Yubuta, Yuta Saiga, Toshiro Takabatake, Gerald Giester, Peter Rogl

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2 Citations (Scopus)

Abstract

The crystal structures of two novel ternary compounds, Ce3Pt4Sn6 and Ce1-xPt6Al13+2x (x = 0.207), have been derived by direct methods from X-ray single crystal data. Whereas Ce1-xPt6Al13+2x is of a new structure type (a = 1.42224(2) nm, c = 0.87367(1) nm, space group P6¯2m), Ce3Pt4Sn6 was found to crystallize in two different crystal modifications, (i) a monoclinic variant (a = 0.93682(2) nm, b = 0.46145(1) nm, c = 1.40434(3) nm, β = 99.635(1)°, space group P21/m), which is isotypic with the Y3Pt4Ge6-type and (ii) an orthorhombic modification (a = 2.76394(4) nm, b = 0.460588(7) nm, c = 0.93530(1) nm, space group Pnma), which crystallizes with the ordered Pr3Pt4Ge6-type. For the monoclinic arrangement m-Ce3Pt4Sn6 an intrinsically defect growth pattern was found - it grows in two related motifs (opposite directions of pentagonal units) in the ratio of 90%: 10% ensuring a stoichiometric composition. TEM observation directly revealed intrinsic building defects detected by single crystal X-ray diffraction for m-Ce3Pt4Sn6. Diffuse streaks in electron diffraction and inhomogeneous contrasts in a high resolution TEM image indicate the existence of a random stacking sequence between two related motifs.

Original languageEnglish
Pages (from-to)48-57
Number of pages10
JournalSolid State Sciences
Volume55
DOIs
Publication statusPublished - May 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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