Die Kristallstruktur von Gadolinium-(III)-hydrogensulfat Gd(H SO₄)₃ / Crystal Structure of Gadolinium-(III)-hydrogensulfate Gd(HSO₄)₃

Abstract

Gd(HSO4)3 is obtained on treatment of Gd2(SO4)3 in conc. H2SO4 in closed vessels at 200 °C. The extremely moisture-sensitive crystals belong to the orthorhombic space group Pbca. Lattice constants are a = 12.080(8), b = 9.574(8), c = 16.513(8)Å and Z = 8. Gadolinium is coordinated by eight oxygen atoms of the hydrogensulfate ligands forming a distorted square antiprism. There are three different HSO4- anions within the structure. One of them is coordinated with two Gd atom s while two HSO4- anions bridge three Gd atoms. The Gd-O bond lengths vary in the range of 2.334(6)-2.423(5)Å .

Selten-Erd-Hydrogensulfate M(HSO4)3 (M = La, Ce-Nd): Derivate des UCl3-Typs

“…Ein Vergleich der vorgestellten Kristallstrukturen mit jenen der bisher charakterisierten Selten-Erd-Hydrogensulfate von Erbium [1] und Gadolinium [2] zeigt die erwartete Zunahme der Koordinationszahl von M 3+ . In den hier vorgestellten Hydrogensulfaten treten nur sehr schwache ¹Wasserstoffbru È ckenbindungenª auf.…”

Sulfate und Hydrogensulfate des Erbiums: Er(HSO4)3-I, Er(HSO4)3-II, Er(SO4)(HSO4) und Er2(SO4)3

“…Lediglich u È ber die Kristallstruktur von Gd(HSO 4 ) 3 wurde ku È rzlich berichtet [10]. Dieses wurde bei dem Versuch erhalten, Gd 2 (SO 4 ) 3 …”

Synthesis, Crystal Structure, and Thermal Behavior of the Rare Earth Sulfates (H5O2)M(SO4)2 (M = Ho, Er, Y)

“…At 180 °C, the diffractogram contains only reflections of Y(HSO 4 )(SO 4 ). Indexing was possible using single-crystal data of Er(HSO 4 )(SO 4 ) which where obtained recently . Y(HSO 4 )(SO 4 ) remains stable at 300 °C, but complete decomposition to Y 2 (SO 4 ) 3 is observed at 360 °C.…”

“…The reaction of hydrogen sulfates M(HSO 4 ) 3 (M = Ho, Er, Y), which were synthesized following the route given in ref , with water (moisture), was investigated on a θ/θ powder diffractometer (STOE&CIE) equipped with a HDK 2.4 reaction chamber (BÜHLER). Powder samples were placed on a small silver plate in the chamber, which was first purged with dry N 2 .…”

“…Sulfates of the rare earth elements and their derivatives have rarely been investigated. Reliable structural data are available only for a few compounds, namely hydrates such as Pr(SO 4 ) 2 ·8H 2 O and “ternary” sulfates such as NaNd(SO 4 ) 2 . − Recently, the hydrogen sulfates of some rare earth elements, M(HSO 4 ) 3 (M = La, Ce−Er) were synthesized by the reaction of lanthanide oxides with concentrated sulfuric acid at elevated temperatures. − Reduction of the acid concentration and the reaction temperature then led to the oxonium rare earth sulfate hydrates (H 5 O 2 )M(SO 4 ) 2 . There is one compound of the same composition described in the literature (M = Ce), but its structure is found to be completely different.…”