Syntheses, crystal structures and vibrational spectra of KLn(SO{sub 4}){sub 2}.H{sub 2}O (Ln=La, Nd, Sm, Eu, Gd, Dy)

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.07.024· OSTI ID:21483672

Kazmierczak, Karolina ^[1]

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1. Institut fuer Anorganische und Analytische Chemie, Albert-Ludwigs-Universitaet, Albertstrasse 21, D-79104 Freiburg (Germany)

The potassium lanthanide double sulphates KLn(SO{sub 4}){sub 2}.H{sub 2}O (Ln=La, Nd, Sm, Eu, Gd, Dy) were obtained by evaporation of aqueous reaction mixtures of rare earth (III) sulphates and potassium thiocyanate at 298 K. X-ray single-crystal investigations show that KLn(SO{sub 4}){sub 2}.H{sub 2}O (Ln=Nd, Sm, Eu, Gd, Dy) crystallise monoclinically (Ln=Sm: P2{sub 1}/c, Z=4, a=10.047(1), b=8.4555(1), c=10.349(1) A, wR2=0.060, R1=0.024, 945 reflections, 125 parameters) while KLa(SO{sub 4}){sub 2}.H{sub 2}O adopts space group P3{sub 2}21 (Z=3, a=7.1490(5), c=13.2439(12) A, wR2=0.038, R1=0.017, 695 reflections, 65 parameters). The coordination environment of the lanthanide ions in KLn(SO{sub 4}){sub 2}.H{sub 2}O is different in the case of the Nd/Sm/Gd and the Eu/Dy compounds, respectively. In the first case the Ln atoms are nine-fold coordinated in contrast to the latter where the Ln ions are eight-fold coordinated by oxygen atoms. The vibrational spectra of KLn(SO{sub 4}){sub 2}.H{sub 2}O and the UV-vis reflection spectra of KEu(SO{sub 4}){sub 2}.H{sub 2}O and KNd(SO{sub 4}){sub 2}.H{sub 2}O are also reported. - Graphical abstract: The lanthanide potassium double sulphates exhibit an unexpected change in the coordination mode by a simple rotation of sulphate tetrahedron 2.

• OSTI ID: 21483672
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 183; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALI METAL COMPOUNDS
ANTITHYROID DRUGS
CARBONIC ACID DERIVATIVES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DRUGS
DYSPROSIUM COMPOUNDS
ELECTROMAGNETIC RADIATION
EUROPIUM COMPOUNDS
GADOLINIUM COMPOUNDS
IONIZING RADIATIONS
LANTHANUM COMPOUNDS
MONOCLINIC LATTICES
MONOCRYSTALS
NEODYMIUM COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
SAMARIUM COMPOUNDS
SPACE GROUPS
SULFATES
SULFUR COMPOUNDS
SYMMETRY GROUPS
SYNTHESIS
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
THIOCYANATES
TRIGONAL LATTICES
X RADIATION