J. Stepien-Damm

Crystal structure of the new ternary indide CePt2In2 and the isostructural compounds RPt2In2 (R=La, Pr, Nd)

Abstract The title compounds have been synthesized by arc melting of the elemental components and subsequent annealing at 870 K. The crystal structure of CePt 2 In 2 was determined from single-crystal X-ray data ( R =0.0437 for 1439 | F | values and 62 variables). It represents a new structure type of intermetallic compounds: P2 1 /m, mP20, a =10.189(6), b =4.477(4), c =10.226(6) A, β =117.00(5)°, V =416.1(1) A 3 , Z =4. Isostructural compounds have been found also for La, Pr, and Nd.

Crystal structure of RCuPb (R=Y, Sm, Gd, Tb, Dy, Ho, Er, Tm, Lu) compounds

Abstract The crystal structures of RCuPb (R=Y, Tb, Tm and Lu) compounds were investigated by X-ray powder diffraction. The crystal structure of DyCuPb was reinvestigated by the X-ray single crystal method and RCuPb (R=Sm, Gd, Dy, Ho, Er) by X-ray powder diffraction. The compounds crystallize in the LiGaGe structure type (space group P6 3 mc , Pearson code hP6 ).

The Pr–Fe–Sn ternary system: phase diagram and crystal structure of PrFe0.4Sn2

Abstract The isothermal section of Pr–Fe–Sn system at 670 K has been investigated by EDAX and X-ray phase analysis. Two ternary compounds, Pr 6 Fe 13 Sn and PrFe 0.4 Sn 2 have been found. Crystal structure of the PrFe 0.4 Sn 2 compound was refined to be isotypic with CeNiSi 2 ( a =4.545(1) A, b =16.833(3) A, c =4.448(1) A).

Phase equilibria in the ternary systems Pr–Fe–Bi and Sm–Fe–Bi

Abstract Phase equilibria in the systems Pr–Fe–Bi and Sm–Fe–Bi were investigated by X-ray powder diffraction and the isothermal cross-sections at 400°C were obtained. The R 5 FeBi 2 compounds (R=Pr, Sm) of unknown crystal structure, stable within the temperature range from the melting temperature to 400°C have been found. The existence of the Pr 6 Fe 13 Bi and Sm 6 Fe 13 Bi compounds (Nd 6 Fe 13 Si structure type) in cast alloys has been confirmed, but they are not stable at the temperature of the heat treatment.

Crystal structure of Ce3Ge1.11In0.89 and related compounds

Abstract The title compound was prepared by arc melting of the elemental components and subsequent annealing at 870 K. The crystal structure of Ce 3 Ge 1.11 In 0.89 was refined from single crystal X-ray data: I4/mcm , tI80, a =12.142(2) A, c =15.919(3) A, V =2346.9(2) A 3 , z =16, R =0.0475 for 362 F 2 values and 34 parameters. It crystallized with the La 3 GeIn type structure, an ordered variant of the Gd 3 Ga 2 -type. Isostructural compounds were found also for Pr and Nd.

Crystal structure, magnetic and electrical properties of ZrNi2In and ZrCu2In

Abstract ZrNi2In and ZrCu2In crystallise with the cubic MnCu2Al-type structure (space group Fm3m) with the lattice parameters a=6.288(1) A and 6.338(1) A, respectively. At ambient temperatures ZrNi2In is a Pauli paramagnet with a magnetic susceptibility of 2.5×10−4 emu/mole, whereas ZrCu2In is diamagnetic with the temperature independent susceptibility of −2.7×10−5 emu/mole. Both compounds show a metallic type of the electrical conductivity.

Formation of the alloys UCo5−xInx (x=0.5 and 1) and their characterization by X-ray diffraction, magnetization, and electrical-resistivity measurements

Abstract The ternary alloys UCo 4.5 In 0.5 and UCo 4 In were synthesized and characterized by X-ray diffraction at room temperature. They crystallizes in the FCC-based MgSnCu 4 -type structure, closely related to the AuBe 5 -type structure of the UT 5 compounds (T=Ni, Cu, Pt), otherwise not found in binary U–Co phases around the Co/U atomic ratio equal to 5. The lattice parameter of the supposedly terminal compound UCo 4 In is 694.5±0.5 pm. This value locates in the range of those of isostructural compounds. Measurements of the magnetization, performed for the two above compositions in the wide range of temperatures 1.7–500 K, indicate weak ferrimagnetic behavior with approximate Curie temperatures of T c =430 and 350 K, respectively. The electrical resistivity measured in the range 4.2–300 K confirms their metallic character.

Crystal structure of europium nickel diindide, EuNiIn2

1. Rykhal, R. M., Zarechnyuk, O.S., Yarmoluk, Ya. P.: Crystal structure of YNiAh compound. Kristallographiya 17 (1996) 521-524 (in Russian). 2. Zaremba, V. I.; Zakharko, O. Ya.; Kalychak, Ya. M.; Bodak, Ο. I.: Crystal structure of compounds RNilm (R=Y,Gd,Tb,Dy) and CaNiIn2. Dopov. Acad. Nauk Ukrain. RSR, Β 12 (1987) 44-46. 3. Sysa, L. W.; Kalychak, Ya. M.: New ternary compounds indium with calcium (europium) and copper (nickel). Sov. Phys. Crystallogr. 38 (1993)271-274. The compound EuNiIn2 belongs to MgCuAl2 structure type (see réf. 1). The largest atoms Eu occupy pentagonal prisms [Ni2lng], In atoms occupy tetragonal prisms [Eu4NÌ2ln2] and the smallest atoms Ni are in trigonal prisms [EU2I114]· EuNiIn2 prolongs the series of ternary indides RNiIn2 (R=Gd, Tb, Dy, Y), CaNiIn2 (see ref. 2), CaCuIn2 (see ref. 3), CePdIn2 (see ref. 4) and NaAuIn2 (see ref. 5). In EuNiIn2 and NaAuIn2, the strongest contraction is in R M interatomic distances (R=Na, Eu; M=Au, Ni), however in CePdIn2 the In-In interatomic distance is the most shortened.