Hydrothermal Synthesis and Characterization of a New Arsenic–Vanadium Compound with a β-[As₈V₁₄O₄₂(SO₄)]⁶⁻ anion

A new arsenic vanadium compound (NH4)(2)[N(CH3)(4)](4)[beta-As8V14O42(SO4)] 1 has been synthesized under hydrothermal conditions and characterized by single crystal X-ray diffraction, IR spectrum, elemental analysis and thermogravimetic (TG) analysis. Compound 1 crystallizes in monoclinic system with space group P2(1)/c, a = 11.4631(5) angstrom, b = 11.3539(5) angstrom, c = 24.6265(10) angstrom, beta = 93.6620(10)degrees, V = 3198.6(2) angstrom(3), Z = 2, R1 = 0.0421 and wR2 = 0.1044. The molecule structural analysis reveals that compound 1 has a beta-[As8V14O42(SO4)](6-) arsenic-vanadium cluster anion.