Two new cesium containing manganese vanadates are synthesized by a facile method. The known compound K₂Mn(VO₃)₄ (1), synthesized via a milder method than the previous hydrothermal reaction, was firstly used as a precursor to prepare two new manganese vanadates, namely CsMn(VO₃)₃·H₂O (2) and Cs_4.34Mn_1.83(VO₃)₈·2.965H₂O (3) in concentrated Cs⁺ aqueous solutions at 80 °C. Compound 2 features a three-dimensional (3D) microporous framework constructed from serrated (VO₃)_n chains interconnected by Mn²⁺ ions. The Cs⁺ ions and the lattice water molecules are located in the channels of the structure along the a-axis. In compound 3, the sinusoidal (VO₃)_n chains are linked by Mn²⁺ ions into V–O–Mn double chains, which are further weaved by {Mn₄O₈} units to form a 3D microporous network with channels occupied by disordered Cs⁺ ions. Compounds 2 and 3 are the first Cs–Mn–V–O examples with a 3D microporous framework. Thermal stabilities of compounds 2 and 3 were investigated by thermogravimetric (TG) analysis. This work provides an effective synthetic method for preparing alkali-metal containing heterometallic vanadates with new composition and structures.

中文翻译：

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通过前体法制备新的含铯钒酸锰

通过简便的方法合成了两种新的含铯钒酸锰。通过比之前的水热反应更温和的方法合成的已知化合物 K ₂ Mn(VO ₃ ) ₄ ( 1 )首先被用作制备两种新的钒酸锰的前驱体，即 CsMn(VO ₃ ) ₃ ·H ₂ O ( 2 ) 和 Cs _4.34 Mn _1.83 (VO ₃ ) ₈ ·2.965H ₂ O ( 3 ) 在80 °C 的浓 Cs ⁺水溶液中。化合物2具有由锯齿状 (VO ₃ ) _n链构成的三维 (3D) 微孔框架，通过 Mn ²⁺离子相互连接。Cs ⁺离子和晶格水分子位于沿a轴的结构通道中。在化合物3 中，正弦 (VO ₃ ) _n链通过 Mn ²⁺离子连接成 V–O–Mn 双链，再由 {Mn ₄ O ₈ } 单元编织形成一个 3D 微孔网络，通道由无序的 Cs ⁺离子。化合物2和3是第一个具有 3D 微孔框架的 Cs-Mn-V-O 示例。通过热重 (TG) 分析研究了化合物2和3 的热稳定性。该工作为制备具有新成分和结构的含碱金属的杂金属钒酸盐提供了一种有效的合成方法。