Summary of Collaborative Investigation: CU-6 Jeffrey Clayhold, Miami University, USA Shiou-Jyh Hwu, Clemson University, USA Raivo Stern & Toomas Rõõm, National Institute of Chemical Physics & Biophysics, Estonia Sergei Zvyagin, National High Magnetic Field Laboratory, USA

CU-6; (AX)·Cu 5 O 2 (M’O 4 ) 2 (A = Rb, Cs; X = Cl, Br, I; M’=P, As ) CsCl + 5 CuO + As 2 O 5  (CsCl)·Cu 5 O 2 (AsO 4 ) 2 High-Temperature, Solid-State Synthesis 800 o C in carbon-coated fused silica 2mm CU-6-Cl

Cu(2)-O slab Cu(2)-O slab Cu(1)-O-As slab Novel Layered Cuprates with Kagome Network of a Pyrochlore-Type a) Averievite : Starova, et al., Minerological Magazine 1997, 61, b) Hwu et al. Angew. Chem. Int. Ed. Engl., submitted. d Cu-Cl = Å Kagome Lattice

? Magnetic Susceptibility of Geometrically Frustrated Magnetic Kagome Lattice  = -204(7) K  eff = 1.93(4)  BM Greedan, J. Mater. Chem. 2001, 11, and references cited therein.

Room temperature 133 Cs MAS NMR in Geometrically Frustrated Magnetic Kagome Lattice CU-6: (CsCl)·Cu 5 O 2 (AsO 4 ) 2 Multiple Cs sites at room temperature?

Variable temperature 133 Cs MAS NMR in Geometrically Frustrated Magnetic Kagome Lattice CU-6: (CsCl)·Cu 5 O 2 (AsO 4 ) 2