Metal-rich phosphides RE{sub 5}Ir{sub 19}P{sub 12} with Sc{sub 5}Co{sub 19}P{sub 12} type structure

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.07.045· OSTI ID:21580030

Pfannenschmidt, Ulrike; Rodewald, Ute Ch; Hoffmann, Rolf-Dieter ^[1]; Poettgen, Rainer ^[1]

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1. Institut fuer Anorganische und Analytische Chemie, Universitaet Muenster, Corrensstrasse 30, D-48149 Muenster (Germany)

The iridium-rich phosphides RE{sub 5}Ir{sub 19}P{sub 12} (RE=Sc, Y, La-Nd, Sm-Lu) with Sc{sub 5}Co{sub 19}P{sub 12} type structure, space group P62-bar m were synthesized by solid state reactions of the elements in tantalum crucibles. Well shaped single crystals were obtained in bismuth fluxes. All phosphides were characterized on the basis of X-ray powder data. The structures of RE{sub 5}Ir{sub 19}P{sub 12} with RE=Sc, La, Ce, Dy, Er, Tm, and Yb were refined from single crystal diffractometer data. The complex structure of these phosphides can be described by an intergrowth of simpler ThCr{sub 2}Si{sub 2} and SrPtSb related slabs. Striking structural motifs of the RE{sub 5}Ir{sub 19}P{sub 12} structures are slightly distorted tricapped trigonal prisms of the metal atoms around the phosphorus atoms. The iridium and phosphorus atoms build up three-dimensional [Ir{sub 19}P{sub 12}] polyanionic networks (230-286 pm Ir-P and 282-296 pm Ir-Ir in La{sub 5}Ir{sub 19}P{sub 12}) which leave cavities of coordination numbers 16 and 15 for the rare earth atoms. - Graphical Abstract: The intergrowth structure La{sub 5}Ir{sub 19}P{sub 12}. Highlights: > Metal flux syntheses of intermetallic compounds. > Synthesis and structure of new phosphides RE{sub 5}Ir{sub 19}P{sub 12}. > Crystal chemistry of metal-rich phosphides. > Description of the RE{sub 5}Ir{sub 19}P{sub 12} structure as an intergrowth variant.

• OSTI ID: 21580030
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 10; Other Information: DOI: 10.1016/j.jssc.2011.07.045; PII: S0022-4596(11)00424-5; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ATOMS
BISMUTH
CHEMISTRY
CRUCIBLES
FLUX SYNTHESIS
INTERMETALLIC COMPOUNDS
IRIDIUM
MONOCRYSTALS
PHOSPHIDES
PHOSPHORUS
RARE EARTHS
SOLIDS
SPACE GROUPS
SYNTHESIS
TANTALUM
THREE-DIMENSIONAL CALCULATIONS
X RADIATION
ALLOYS
CRYSTALS
ELECTROMAGNETIC RADIATION
ELEMENTS
IONIZING RADIATIONS
METALS
NONMETALS
PHOSPHORUS COMPOUNDS
PLATINUM METALS
PNICTIDES
RADIATIONS
REFRACTORY METALS
SYMMETRY GROUPS
TRANSITION ELEMENTS