The Unconventional Cadmium Borosulfates Cd[B ₂ O(SO ₄ ) ₃ ] and Cd ₄ [B ₂ O(SO ₄ ) ₆ ]

Borosulfates are an expanding class of silicate-analogous materials. We report the syntheses and crystal structures two unconventional cadmium borosulfates. Cd[B2O(SO4)3] crystallises in a new structure type space group Pnma (no. 62, a=896.92(8), b=1152.0(1), c=872.75(8) pm, 1380 refl., 94 ref. param., wR2=0.112). Cd4[B2O(SO4)6] adapts α-Mg4[B2O(SO4)6]-type with P 147, a=822.22(4), c=797.88(5) 1810 58 wR2=0.078). Together simultaneously elsewhere reported conventional phyllosilicate-analogous Cd[B2(SO4)4], there now total three borosulfates differing dimensionality their anions, i. e. 0D, 1D 2D. These results highlight special position periodic table ambiguity its behaviour as main or transition metal when comparing to other analogous related The [B2O(SO4)3]2− [B2O(SO4)6]8− anions known from However, Cd2+ is first cation for which comprising both same cation. Moreover, optical thermal properties compounds using IR UV-Vis spectroscopy well thermogravimetry. Both were prepared by decomposition borosulfate Cd[B2(SO4)4] pursueing our studies on complex such