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The Short Series of Lanthanoid(III) Nitride Tellurides with the Composition Ln 3 NTe 3 ( Ln = Gd–Ho)
Author(s) -
Foltin Markus L.,
Schleid Thomas
Publication year - 2015
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.201400525
Subject(s) - crystallography , lanthanide , isostructural , chemistry , octahedron , monoclinic crystal system , crystal structure , nitride , coordination number , ion , organic chemistry , layer (electronics)
A new short series of isostructural lanthanoid(III) nitride tellurides with the composition Ln 3 NTe 3 ( Ln = Gd–Ho) was synthesized through reactions of the metal (Gd–Ho) with sodium azide (NaN 3 ), tellurium (Te), iodine (I 2 ) and sodium iodide (NaI) as flux in evacuated fused silica tubes for seven days at 950 °C. Black, brick‐shaped single crystals of the Ln 3 NTe 3 represenatives crystallize isotypically with Y 3 NTe 3 in the monoclinic space group P 2 1 / c with lattice parameters ranging from a = 815.28(6), b = 1200.92(8), c = 866.07(6) pm and β = 109.092(3)° for Gd 3 NTe 3 to a = 802.37(6), b = 1181.69(8), c = 857.30(6) pm and β = 108.816(3)° for Ho 3 NTe 3 and Z = 4. Three crystallographically independent Ln 3+ cations form the basic framework of their crystal structure and are coordinated by six anions each. One trigonal prism and two octahedra with different grades of distortion appear as coordination spheres. Isolated dimers [N 2 Ln 6 ] 12+ ( d (N– Ln ) = 219–232 pm) as pairs of two edge‐sharing [N Ln 4 ] 9+ tetrahedra, however, serve as main structural feature. Their three‐dimensional interconnection and charge compensation is achieved by three crystallographically distinct Te 2– anions ( d (Te– Ln ) = 299–337 pm) with contacts to four or five Ln 3+ cations each. Finally, this short Ln 3 NTe 3 series closes an information gap between the lanthanoid(III) nitride tellurides and the well‐investigated, but not isotypic nitride sulfides and selenides with the same composition ( Ln 3 N Ch 3 : Ln = La–Nd, Sm, Gd–Dy; Ch = S and Se).