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@ARTICLE{Alahmari:859589,
      author       = {Alahmari, Fatimah and Dey, Somnath and Emwas, Abdul-Hamid
                      and Davaasuren, Bambar and Rothenberger, Alexander},
      title        = {{L}ayered copper thioaluminate {K}2{C}u3{A}l{S}4:
                      {S}ynthesis, crystal structure, characterization and
                      solid-state 27{A}l and 39{K} {NMR} studies},
      journal      = {Journal of alloys and compounds},
      volume       = {776},
      issn         = {0925-8388},
      address      = {Amsterdam [u.a.]},
      publisher    = {ScienceDirect},
      reportid     = {FZJ-2019-00438},
      pages        = {1041 - 1047},
      year         = {2019},
      abstract     = {The first example of alkali/transition metal thioaluminates
                      K2Cu3AlS4 was synthesized and characterized. The compound
                      crystallizes in the orthorhombic space group Pnna (no. 52),
                      with unit cell parameters a = 5.471 (6) Å,
                      b = 5.468 (6) Å and c = 13.111 (1) Å, within a
                      pseudo-tetragonal lattice. Its crystal structure consists of
                      2D [Cu3AlS4]2- polyanionic anti-PbO type layers, in which Al
                      and Cu atoms share the atomic positions, separated by K+
                      cations. The (Cu/Al) atomic positions are tetrahedrally
                      coordinated by S atoms, whereas K atoms are surrounded by
                      eight S atoms in a cubic fashion. The coordination
                      environments of the Al and K cations were confirmed by
                      solid-state 27Al and 39K NMR, respectively. The title
                      compound is a semiconductor with a direct bandgap of
                      2.96 eV, and thermally stable up to 550 °C},
      cin          = {IEK-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000453826200119},
      doi          = {10.1016/j.jallcom.2018.10.239},
      url          = {https://juser.fz-juelich.de/record/859589},
}