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Synthesis and Structure of the New Compound La 2 O(CN 2 ) 2 Possessing an Interchanged Anion Proportion Compared to the Parent La 2 O 2 (CN 2 ). Synthese und Kristallstruktur der neuen Verbindung La 2 O(CN 2 ) 2 mit einem vertauschten Anionenverhältnis gegenüber der Bezugsverbindung La 2 O 2 (CN 2 )
Author(s) -
Srinivasan Radhakrishnan,
Tragl Sonja,
Meyer H.Jürgen
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400450
Subject(s) - monoclinic crystal system , crystallography , crystal structure , ion , x ray crystallography , chemistry , tetrahedron , single crystal , materials science , diffraction , physics , optics , organic chemistry
La 2 O(CN 2 ) 2 was synthesized from a 1:1:2 molar reaction mixture of LaCl 3 , LaOCl, and Li 2 (CN 2 ) at 650 °C. Well developed single crystals were grown from a LiCl‐KCl flux. The crystal structure was refined as monoclinic (space group C 2/ c , Z = 2, a = 13.530(2) Å, b = 6.250(1) Å, c = 6.1017(9) Å, β = 104.81(2)°) from single crystal X‐ray diffraction data. The La 3+ and (CN 2 ) 2— ions in the crystal structure of La 2 O(CN 2 ) 2 can be compared to Fe 3+ and S 2 2— ions in the cubic pyrite structure, being arranged like in a distorted NaCl type structure with their centers of gravity. In addition, the O 2— ions in La 2 O(CN 2 ) 2 are occupying 1/4 of the tetrahedral voids formed by the arrangement of metal ions.