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crystal data
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)°.