Abstract A new silicate-germanate K2Y[(Si3Ge)O10(OH)] was synthesized hydrothermally in a system Y2O3:GeO2:SiO2 = 1:1:2 (T = 280 °C; P = 90–100 atm.); K2CO3 was added to the solution as a mineralizer. Single-crystal X-ray diffraction experiment was carried out at low temperature (150 K). The unit cell parameters are a = 10.4975(4), b = 6.9567(2), c = 15.4001(6) Å, β = 104.894(4)°; V = 1086.86(7) Å3; space group is P 21/c. A novel complex anion is presented by corrugated (Si,Ge) tetrahedral layers connected by couples of YO6 octahedra into the mixed microporous framework with the channels along b and a axes, the maximal size of cross-section is ~5.6 Å. This structure has similarity with the two minerals: ring silicate gerenite (Ca,Na)2(Y,REE)3Si6O18 · 2H2O and chain silicate chkalovite Na2BeSi2O6. Six-member rings with 1̅ symmetry as in gerenite are distinguished in the new layer. They are mutually perpendicular to each other and connected by additional tetrahedra. Straight crossing chains in chkalovite change to zigzag four-link chains in the new silicate-germanate layer.

中文翻译：

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具有异常复杂波纹层的硅酸盐-锗酸盐 K2Y[(Si3Ge)O10(OH)] 及其与环状硅酸盐辉长岩和链状硅酸盐辉绿岩的相关性

摘要 在 Y2O3:GeO2:SiO2 = 1:1:2 (T = 280 °C; P = 90–100 atm.) 体系中水热合成了一种新的硅酸盐-锗酸盐 K2Y[(Si3Ge)O10(OH)]；K2CO3 作为矿化剂加入到溶液中。在低温（150 K）下进行单晶X射线衍射实验。晶胞参数为 a = 10.4975(4), b = 6.9567(2), c = 15.4001(6) Å, β = 104.894(4)°；V = 1086.86(7) Å3；空间群是 P 21/c。一种新的复合阴离子由波纹 (Si,Ge) 四面体层呈现，由成对的 YO6 八面体连接到混合微孔框架中，通道沿 b 轴和 a 轴，横截面的最大尺寸为~5.6 Å。这种结构与两种矿物有相似之处：环状硅酸盐辉长岩(Ca,Na)2(Y,REE)3Si6O18·2H2O和链状硅酸盐chkalovite Na2BeSi2O6。在新层中可以区分出具有 1̅ 对称性的六元环，如在辉光岩中。它们相互垂直，并由额外的四面体连接。在新的硅酸盐-锗酸盐层中，chkalovite 中的直交叉链变成了锯齿形的四链链。