Das erste seiner Art: K5[B(SO4)4], das erste Borosulfat, enthält nichtkondensierte [B(SO4)4]5−‐Anionen, bei denen Boratome tetraedrisch von Sulfattetraedern umgeben sind (siehe Struktur; B braun, O rot, S gelb). Die Verbindung wurde röntgenographisch und schwingungsspektroskopisch untersucht und kristallisiert in einer polaren Raumgruppe.
Abstract. The lanthanide(III) chloride oxidotungstates(VI) with the formula Ln 3 Cl 3 [WO 6 ] for Ln = La -Nd, Sm -Tb were synthesized by solid-state reactions utilizing the respective lanthanide trichloride, lanthanide sesquioxide (where available), and tungsten trioxide together with lithium chloride as flux. The title compounds crystallize hexagonally in space group P6 3 /m (no. 176, a = 941-909, c = 543-525 pm, Z = 2). The structures comprise crystallographically unique Ln 3+ cations surrounded by six O 2-and four Cl -anions (C.N. = 10) forming distorted tetracapped trigonal prisms as well as rather uncommon trigonal prismatic [WO 6 ] 6-units, whose edges are coordinated by
NH 4 ) 2 [B 2 P 3 O 11 (OH)] was synthesized as a crystalline colorless powder by reaction of (NH 4 ) 2 HPO 4 , H 3 BO 3 , and H 3 PO 4 under hydrothermal conditions at 180°C. According to X-ray single-crystal investigations (NH 4 ) 2 [B 2 P 3 O 11 (OH)] crystallizes in a new structure type in the orthorhombic space group P2 1 2 1 2 1 (no. 19) [Z = 4, a = 4.509(3), b = 14.490(11), c = 16.401(12) Å, R 1 = 0.046, wR 2 = 0.093, 1682 data, 200 parameters]. The crystal structure comprises infinite
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