Neue Silber(I)-germanate

Abstract

Four silver(I)-germanates have been prepared from the binary components Ag2O and GeO2 by solid state reaction applying elevated oxygen pressures (2500-3000 bar). Ag6Ge2O7 isisostructural to Ag6Si2O7(II) [P21,a= 16.268(3), b = 10.021(2), c = 5.320(1) Å, β = 90.85(2)°], Ag10Ge4O13 to Ag10Si4O13 [PT, a = 11.731(3), b = 9.147(3), c = 8.727(4) Å, a = 99.33(2), β = 91.61(1), γ = 114.27(2)°]. According to the results of preparative investigations and chemical analysis there are two further phases in the system Ag2O/GeO2 of compositions ′Ag2GeO3′ and ′Ag2Ge2O5′.