Universität zu Köln

Goerigk, Felix C., Schander, Svetlana, Wickleder, Mathias S. ORCID: 0000-0002-8864-4227 and Schleid, Thomas (2020). The Triclinic Lanthanoid(III) Halide Oxidoarsenates(III) Sm3Cl2[As2O5][AsO3] and Tm3Br2[As2O5][AsO3]. Z. Anorg. Allg. Chem., 646 (13). S. 985 - 992. WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1521-3749

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Abstract

Pale yellow single crystals of the composition Ln(3)X(2)[As2O5][AsO3] (Ln = Tm for X = Br and Ln = Sm for X = Cl) were obtained via solid-state reactions in the systems Ln(2)O(3)/As2O3 from sealed silica ampoules using different halides as fluxing agents. Sm3Cl2[As2O5][AsO3] and Tm3Br2[As2O5][AsO3] crystallize isotypically in the triclinic space group P (1) over bar with Z = 2 and cell parameters of a = 543.51(4) pm, b = 837.24(6) pm, c = 1113.45(8) pm, a = 90.084(2)degrees, beta = 94.532(2)degrees, gamma = 90.487(2)degrees for the samarium and a = 534.96(4) pm, b = 869.26(6) pm, c = 1081.84(8) pm, a = 90.723(2)degrees, beta = 94.792(2)degrees gamma = 90.119(2)degrees for the thulium compound. The isotypic crystal structure of both representatives exhibits three crystallographically different Ln(3+) cations, each with a coordination number of eight. (Ln1)(3+) and (Ln2)(3+) are only coordinated by three oxygen atoms, whereas (Ln3)(3+) shows additional contacts to halide anions in forming square [LnO(4)X(4)](9-) antiprisms. All As3+ cations are surrounded by three oxygen atoms in the shape of isolated [AsO3](3-) psi(1)-tetrahedra. They occur either isolated or condensed as pyroanionic [As2O5](4-) units with a bridging oxygen atom. In both anions, non-binding lone-pair electrons are present at the As3+ cations with a pronounced stereochemically active function.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Goerigk, Felix C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schander, Svetlana UNSPECIFIED UNSPECIFIED UNSPECIFIED Wickleder, Mathias S. UNSPECIFIED orcid.org/0000-0002-8864-4227 UNSPECIFIED Schleid, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-326307
DOI:	10.1002/zaac.201900360
Journal or Publication Title:	Z. Anorg. Allg. Chem.
Volume:	646
Number:	13
Page Range:	S. 985 - 992
Date:	2020
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1521-3749
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RARE-EARTH; CRYSTAL-STRUCTURE; SCHEELITE-TYPE; REFINEMENT; OXOARSENATE(III); LUMINESCENCE; CLAUDETITE; PHOSPHATE; ND; RE Multiple languages Chemistry, Inorganic & Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/32630