Abstract
AbstractSystematic studies on selenoborates containing a B12 cluster entity and alkali metal cations led to the new crystalline phase K8[B12(BSe3)6] which consists of a icosahedral B12 cluster completely saturated with trigonal‐planar BSe3 units and potassium counter‐ions. For the first time three different anion substitution patterns are observed in one crystal structure. The new chalcogenoborate was prepared in a solid state reaction from potassium selenide, amorphous boron and selenium in evacuated carbon coated silica tubes at a temperature of 850 °C. K8[B12(BSe3)6] crystallizes in the monoclinic space group Cm (no. 8) with a = 16.288(2)Å, b = 41.617(4)Å, c = 9.788(1)Å, β = 109.59(1)°, and Z = 6.
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