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Preparation and Crystal Structure of the Ternary Lanthanoid Nickel Arsenides Ln 13 Ni 25 As 19 ( Ln = Tm, Yb, and Lu)
Author(s) -
Jeitschko Wolfgang,
Terbüchte Ludger J.,
Rodewald Ute Ch.
Publication year - 2001
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 - 10.1002/1521-3749(200109)627:9<2095::aid-zaac2095>3.0.co;2-b
Subject(s) - chemistry , nickel , crystallography , crystal structure , ternary operation , arsenide , lanthanide , metalloid , metal , materials science , ion , gallium arsenide , optoelectronics , organic chemistry , computer science , programming language
The title compounds were prepared by reaction of the elemental components at high temperatures. They crystallize with a new structure type which was determined from single‐crystal X‐ray data of Tm 13 Ni 25 As 19 : P 6, a = 1621.9(4) pm, c = 387.78(8) pm, Z = 1, R = 0.025 for 3164 structure factors and 119 variable parameters. The refinement of the occupancy parameters suggested a mixed Tm/Ni occupancy for one metal position and defects for one nickel site resulting in the composition Tm 12.57(1) Ni 25.22(2) As 19 . These arsenides belong to a large structural family with a metal to metalloid ratio of 2 : 1.
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