The ytterbium-platinum system

Zr5Ir3 with a deformation superstructure of the Mn5Si3 structure

“…When Biswas & Schubert (1967) reported that ZrsIr 3, HfsIr 3 and ZrsPt3 crystallize with the MnsSi 3 type, it was the first time that this type was observed with compounds where both components are transition elements. Since then the same type has also been found with a series of rare-earth-metal-transition-metal alloys (Raman & Ghassem, 1973;Iandelli & Palenzona, 1975;Le Roy, Moreau, Paccard & Parthr, 1978;Iandelli & Palenzona, 1982;Le Roy, Moreau & Paccard, 1982). The axial ratios c/a for these rare-earth compounds are rather high, as compared with those measured for the transition-metal silicides and homologues, whereas those calculated for the isotypic Zr and Hf alloys with Ir and Pt are in comparison lower.…”

Structures of the rare-earth–platinum compoundsR7Pt3,R2Pt,R5Pt3andRPt

“…The theoretical CrB cell data for PrPt and NdPt based on the FeB data published by Dwight, Conner & Downey (1965) Compounds with the composition R2T, except Yb2Pt (Iandelli & Palenzona, 1975), have not yet been found. For compounds of this composition which are built up exclusively of trigonal prisms, the trigonal-prism linkage coefficient has to be three (Parth+ & Moreau, 1977).…”

“…We report in this paper the structure types and lattice parameters of some of the phases which have been identified. No phase diagram of any R-Pt system was found in the literature except for Yb (Iandelli & Palenzona, 1975).…”

Rare-earth (and yttrium)–iridium and –platinum compounds with the Fe3C structure type

“…In the course of a review of the crystal structures of alloys containing rare-earth elements (and Y) and late transition elements (Parth6 & Moreau, 1977;Le Roy, Moreau, Paccard & Parth6, 1978) it became evident that structural studies of rare-earth (R) rich alloys formed in the systems R-Ir and R-Pt were by no means complete. The only information found on such compounds was for La-Ir (Dmitrieva, Vorobev, 0567-7408/79/061437-03501.00 Varekha, Domashev & Gusynin, 1974), Ce-Ir (Dmitrieva et al, 1973), Yb-Ir (Iandelli & Palenzona, 1976), Nd-Pt, Er-Pt (Moffatt, 1978) and Yb-Pt (Iandelli & Palenzona, 1975). We report here the results of our investigations on other compounds belonging to these systems.…”