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Synthese und Charakterisierung der Verbindungen A IrP ( A : La – Nd; Sr)
Author(s) -
Löhken Anke,
Reiß Guido J.,
Johrendt Dirk,
Mewis Albrecht
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.200400534
Subject(s) - crystallography , crystal structure , chemistry , rare earth , structure type , metal , coordination number , lanthanide , trigonal crystal system , ion , mineralogy , organic chemistry
Abstract Synthesis and Characterization of the Compounds A IrP ( A : La – Nd; Sr) LaIrP ( a = 4.149(2), c = 14.278(6) Å), CeIrP ( a = 4.048(2), c = 14.288(11) Å), PrIrP ( a = 4.069(2), c = 14.206(9) Å), and NdIrP ( a = 4.065(1), c = 14.221(9) Å) are isotypic and crystallize in accordance with the structure determination (single crystal data) with the LaPtSi type structure ( I 4 1 md ; Z = 4). The Ir and P atoms are linked to a three‐dimensional network with a trigonal planar environment, whereas the rare‐earth metal atoms are located in the holes (coordination number 12). We show by DFT band structure calculations, why LaIrP prefers the LaPtSi type structure and not the AlB 2 type. SrIrP ( a = 6.325(1) Å) was investigated by powder methods and crystallizes with the LaIrSi type structure ( P 2 1 3; Z = 4). The Ir and P atoms are coordinated trigonally and form a three‐dimensional framework with the Sr atoms in the gaps (coordination number 17). The compounds were synthesized by heating mixtures of the elements at 1100 °C.