Crystal data for the decavanadates of pyridine, 2-ethlpyridine and 3-ethylpyridine

Indexed powder patterns of three monoclinic compounds of general formula (BH)₃H₃V₁₀O₂₈.xH₂O, where x = 0.5–1 and B = pyridine (J1), 2-ethylpyridine (J5) and 3-ethylpyridine (J6) are given. The lattice parameters of the unit cells with two molecules are: J1, (C₅H₅NH)₃H₃V₁₀O₂₈.0.5H₂O, a = 18.567 (1), b = 10.428 (1), c = 11.876 (1) Å, β = 94.67 (1)°; J5, (C₇H₉NH)₃H₃V₁₀O₂₈.0.5H₂O, a = 8.314 (2), b = 12.094 (3), c = 22.415 (5) Å, β = 93.13 (3)°; J6, (C₇H₉NH)₃H₃V₁₀O₂₈.1.0H₂O, a = 6.872 (1), b = 11.886 (2), c = 22.643 (4) Å, β = 91.31 (2)°.