Abstract Conditions necessary for the formation of isostructural sodium heteropoly decatungstolanthanidates(III) with Peacock–Weakley type anion Na 9 [Ln(W 5 O 18 ) 2 ]·35H 2 O (Ln = Gd, Er) in Ln(NO 3 ) 3 –Na 2 WO 4 –HNO 3 –H 2 O solutions with a ratio ν (Ln): ν (W) = 1:10, acidified up to Z = ν (H + )/ ν (WO 4 2− ) = 0.80, were established. The synthesized salts were characterized by Single Crystal X-ray analysis, FT-IR spectroscopy, and scanning electron microscopy. The correlation between structural parameters and the charge of Ln-heteroatom nuclei was determined. Comparison of structural parameters for isostructural neutral salts Na 9 [Ln(W 5 O 18 ) 2 ]·35H 2 O (Ln = Eu, Gd, Tb, Dy, Ho, Er) allowed us to establish linear dependences between decreasing lengths of Ln—O b (W) bonds and interatomic distances O⋯O in Peacock–Weakley type heteropoly anions, and the nuclear charge of Ln–heteroatom. Graphic Abstract Two isostructural sodium heteropoly decatungstolanthanidates(III) with Peacock–Weakley type anion Na 9 [Ln(W 5 O 18 ) 2 ]·35H 2 O (Ln = Gd, Er) have been synthesized from Ln(NO 3 ) 3 –Na 2 WO 4 –HNO 3 –H 2 O solutions, acidified up to Z = ν (H + )/ ν (WO 4 2− ) = 0.80, and characterized by single-crystal X-ray diffraction, FT-IR spectroscopy, and scanning electron microscopy.

中文翻译：

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Peacock-Weakley 型阴离子杂聚十钨镧系元素(III)：等结构盐 Na9[Ln(W5O18)2]·35H2O (Ln = Gd, Er) 的合成和晶体结构

摘要 在 Ln(NO 3 ) 3 中与 Peacock-Weakley 型阴离子 Na 9 [Ln(W 5 O 18 ) 2 ]·35H 2 O (Ln = Gd, Er) 形成同构钠杂多十钨镧系元素 (III) 的必要条件–Na 2 WO 4 –HNO 3 –H 2 O 溶液的比例为 ν (Ln): ν (W) = 1:10，酸化至 Z = ν (H + )/ ν (WO 4 2− ) = 0.80 ，成立。合成的盐通过单晶 X 射线分析、FT-IR 光谱和扫描电子显微镜进行表征。确定了结构参数与Ln-杂原子核电荷之间的相关性。等结构中性盐 Na 9 [Ln(W 5 O 18 ) 2 ]·35H 2 O (Ln = Eu, Gd, Tb, Dy, Ho, Er) 允许我们在 Peacock-Weakley 型杂多阴离子中 Ln-O b (W) 键的长度减小和原子间距离 O⋯O 之间建立线性相关性，以及 Ln-杂原子的核电荷。图形摘要 由 Ln(NO 3 ) 3 合成了两种具有 Peacock-Weakley 型阴离子 Na 9 [Ln(W 5 O 18 ) 2 ]·35H 2 O (Ln = Gd, Er) 的同构钠杂多十钨镧系元素 (III) – Na 2 WO 4 –HNO 3 –H 2 O 溶液，酸化至 Z = ν (H + )/ ν (WO 4 2− ) = 0.80，并通过单晶 X 射线衍射、FT-IR 光谱表征，和扫描电子显微镜。