Crystal structure of Dy11Ge4.33In5.67 and Tm11Ge4In6 from X-ray single-crystal and powder data
Author:
Dominyuk Nataliya12, Nychyporuk Galyna1, Muts Ihor3, Tyvanchuk Yuriy4, Zaremba Vasyl’1, Pöttgen Rainer2
Affiliation:
1. Department of Inorganic Chemistry , Ivan Franko National University of Lviv , Kyryla i Mefodiya Street 6 , 79005 Lviv , Ukraine 2. Institut für Anorganische und Analytische Chemie, Universität Münster , Corrensstrasse 30 , 48149 Münster , Germany 3. Department of Life Safety , Ivan Franko National University of Lviv , Doroshenka Street 41 , 79000 Lviv , Ukraine 4. Department of Analytical Chemistry , Ivan Franko National University of Lviv , Kyryla i Mefodiya Street 6 , 79005 Lviv , Ukraine
Abstract
Abstract
Single crystals of Dy11Ge4.33In5.67 were grown from a sample of the starting composition Dy55Ge20In25 by arc-melting and subsequent annealing. Dy11Ge4.33In5.67 crystallizes with the Sm11Ge4In6-type structure, space group I4/mmm, which was refined from single-crystal X-ray diffractometer data: a = 11.4329(16), c = 16.168(3) Å, wR2 = 0.0341, 927 F
2 values and 42 refined parameters. The isotypic compound Tm11Ge4In6 was characterized by X-ray powder diffraction: a = 11.262(2), c = 15.979(3) Å, R
Bragg = 3.53%. The Sm11Ge4In6-type structure is a coloring variant of the Ho11Ge10 type, realized through germanium-indium ordering. The p-element substructure has four crystallographically independent sites: isolated germanium atoms (Ge4− Zintl anions), In4 squares and In/Ge–In/Ge dumb-bells with pronounced Ge/In mixing.
Publisher
Walter de Gruyter GmbH
Subject
General Chemistry
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