Angewandte Chemie Solid-State Structures DOI: 10.1002/ange.200907096 Al 12 K 8 [OC(CH 3 ) 3 ] 18 : A Wade, Zintl, or Metalloid Cluster, or a Hybrid of All Three?** Patrick Henke, Nils Trapp, Christopher E. Anson, and Hansgeorg Schnöckel* Dedicated to Professor Arndt Simon on the occasion of his 70th birthday Zuschriften 3214 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Angew. Chem. 2010, 122, 3214 –3218