POTASSIUM HYDROGENSULFATE DIHYDROGENSULFA TE, K(HSO4)(H2SO4) SYNTHESIS AND CRYSTAL-STRUCTURE

Single crystals with the composition KH3(SO4)(2) have been synthesized from the system Potassium sulfate/sulfuric acid. The hitherto crystal lographically not investigated compound crystallizes in the monoclinic space group P2(1)/c (14) with the unit cell parameters a = 7.654(3), b = 11.473(5) and c = 8.643(3) Angstrom, beta = 112.43(3)degrees, V = 701.6 Angstrom(3), Z = 4 and D-x = 2.22 g . cm(-3). The structure cont ains two types of tetrahedra, SO3(OH) and SO2(OH)(2)). These tetrahedr a form tetramers via hydrogen bonds consisting of both, two SO3(OH) an d two SO2(OH)(2) tetrahedra. The tetramers are linked to each other vi a hydrogen bonds. Potassium is coordinated by 9 oxygen atoms which bel ong to both kinds of tetrahedra. These potassium oxygen polyhedra are connected by common faces forming chains running parallel z.