Abstract
A new layered germanate, Na8[Zn4Ge8O18(OH)12]·2H2O, has been synthesized from an aqueous solution containing germanium dioxide, zinc acetate and sodium hydroxide. Room temperature single crystal X-ray diffraction data indicate an orthorhombic cell with a = 13.036(3) Å, b = 8.7286(17) Å, c = 12.938(3) Å, space group Pbcn (no. 60), and Z = 4. Chains of orthogonal four-rings, consisting of corner-sharing [Ge2Zn2] units bridged at the zinc centers, are connected to form a new tetrahedral sheet structure containing bifurcated 10-membered rings and the unique building blocks, [GeOn(OH)4 − n] (n = 1, 2). The zincogermanate sheets are stacked along the c-axis and connected both by Na–O electrostatic interactions and a hydrogen bonding network composed of bound water molecules and terminal hydroxide anions.
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