Synthesis, structure and conductivity of Ag2ZnSiO4, Ag2ZnGeO4 and Ag2BeSiO4

Na8[Zn4Ge8O18(OH)12]·2H2O: An interrupted-framework zincogermanate built from [GeO3(OH)] and [Ge2(OH)2] units

“…Bond valence sum calculations were performed to check the validity of this model through the computation of the total valence at each site. 13 For the metal cations, calculated results are in excellent agreement with expected values: Ge(1)~3.93(8), Ge(2)~3.95 (7), Zn~2.04 (5), Na(1)~1.05(2), Na(2)~1.02(2), Na(3)~1.07 (3). Hydrogen and oxygen had reasonable bond valence sums when the errors in H z were taken into consideration.…”

Synthesis, optical and ionic conductivity studies of a lithium cobalt germanate compound

“… 6 The LISICON compound, Li 3.5 Zn 0.25 GeO 4 , presented an ionic conductivity higher than 10 −1 S cm −1 at 673 K. 7 Moreover, the Ag 2 ZnGeO 4 compound is an electronic semiconductor with σ (60°) = 1 × 10 −2 (Ω cm) −1 . 8 S. Ben Yahya and B. Louati have studied the electric properties of A 2 ZnGeO 4 (A = Li and K) compounds. 9,10 They have determined the electrical conductivity of these materials and estimated them: 10 −3 (Ω m) −1 and 10 −5 (Ω m) −1 for K 2 ZnGeO 4 and Li 2 ZnGeO 4 respectively.…”

A2MnXO4 Family (A = Li, Na, Ag; X = Si, Ge): Structural and Magnetic Properties

“…Ag 2 ZnGeO 4 has attracted attention as a photocatalyst , and Li 2 CoGeO 4 as an oxygen evolution catalyst . Several phases of this family are solid-state Na + or Ag + cation conductors − and hosts for luminescent ions. − The most intensely studied members of this family are based on magnetic cations M 2+ = Mn, Fe, and Co, but surprisingly little is known about their magnetic structures and properties. Only Na 2 CoXO 4 (X = Si, Ge) , and Li 2 MSiO 4 (M = Mn, Fe, Co) ,,,,,, have been studied in some detail.…”