Lingmin Zeng

The 800 K isothermal section of the Y–Al–Sb phase diagram

Abstract The isothermal section of the Y–Al–Sb ternary system at 800 K has been investigated mainly by powder X-ray diffraction (XRD) with the aid of differential thermal analysis (DTA), optical microscopy and scanning electron microscopy (SEM). It consists of 12 single-phase regions, 23 two-phase regions and 10 three-phase regions. The maximum solid solubility of Al in Y5Sb3 is about 27 at.%. No ternary compounds were found.

Crystal structure of AgRSb2 (R=Pr, Nd, Gd, Dy, Ho, Er)

Abstract The crystal structures of the AgRSb2 (R=Pr, Nd, Gd, Dy, Ho, Er) compounds were determined by X-ray powder diffraction using the Rietveld method. The investigated compounds crystallize in the tetragonal space group P4/nmm (No. 129) with the CuSi2Zr structure type.

Crystal structure of a new compound Cu5Ho7Sb

Abstract The crystal structure of a new compound, Cu 5 Ho 7 Sb has been determined from X-ray powder diffraction data using the Rietveld method. The investigated compound crystallizes in the tetragonal space group P 4/ nbm (No. 125) with a new structure type and a =0.62008(3) nm, c =0.87807(4) nm and z =1.

The 773 K isothermal section of Er–Ni–Sb phase diagram

Abstract The isothermal section of the Er–Ni–Sb ternary system at 773 K has been investigated mainly by X-ray powder diffraction with the aid of differential thermal analysis and scanning electron microscopy. The formation of the previously reported ErNiSb and Er 5 Ni 2 Sb, was confirmed. No new ternary compounds were observed.

Refinement of the crystal structure of Ge3Nd5

Abstract The structure of Ge 3 Nd 5 has been determined from single-crystal X-ray data. It crystallizes in the hexagonal, space group P6 3 /mcm (No.193) with the Mn 5 Si 3 structure type and a =8.743(2) A, c =6.625(1) A, Z =2, v =438.56(17) A 3 .

Phase relationship of the La-Nd-Fe system at 770 K

Abstract Phase equilibria in the ternary La–Nd–Fe system have been established in the isothermal section of 770 K. The section consists of two single-phase regions, four two-phase regions and two three-phase regions. No ternary compounds were found in this section.

X-ray powder diffraction data and structure refinement of CeFeGe3

The crystal structure of the rare earth (RE) compound CeFeGe 3 has been studied by X-ray powder diffraction and refined by the Rietveld profile fitting method. The compound has the tetragonal BaNiSn 3 -type structure, space group I 4 mm (No. 107) a =4.3294(1) A, c =9.9444(3) A, V =186.39 A 3 , Z =2, and Dx =7.372 g · cm −3 . The figure of merit F N for the powder data is F 30 =184.3(0.0037,44). The structure refinement was performed with 106 reflections and led to R p =13.2% and R wp =18.2%. Powder data are given.

Powder diffraction data of a new compound Al0.35GdGe2

A new ternary compound Al 0.35 GdGe 2 has been synthesized and studied by means of X-ray powder diffraction technique. The ternary compound Al 0.35 GdGe 2 crystallizes in the orthorhombicwith the CeNiSi 2 structure type (space group C m c m , a =4.0874(2) A, b =16.1499(5) A, c =3.9372(1) A, Z =4, and D calc =8.007 g/cm 3 ).

Isothermal section of Dy-Zr-Si ternary system at 773 K

The isothermal section of the phase diagram of the Dy-Zr-Si ternary system at 773 K was determined by X-ray diffraction (XRD) analysis, metallographic analysis, and scanning electron microscopy (SEM) with energy-dispersive spectrometer (EDS) analysis. The isothermal section consists of 13 single-phase regions, 23 two-phase regions, and 11 three-phase regions. The solubilities of Zr in Dy, Dy5Si4, Dy5Si3, DySi, DySi2, DySi1.67, and Dy in Zr, Zr2Si, Zr3Si2, Zr5Si4, ZrSi, and ZrSi2 were determined at 773 K.

Electrochemical performance of compounds Ho6Fe23−xCox (x=0, 1, 3)

Abstract Alloys with composition of Ho6Fe23−xCox (x=0, 1, 3) were prepared and examined by X-ray diffraction technique and automatic battery testing instrument. The compounds Ho6Fe23−xCox (x=0, 1, 3) crystallized in cubic Th6Mn23-type structure with space group (No. 225). The electrochemical properties of these alloys such as discharge capacity, cycling performance and high rate dischargeability were investigated by battery testing instruments in alkaline electrolyte. Substitution of small amounts of Co for Fe in Ho6Fe23−xCox improved the activation, discharge capacity and the high rate dischargeability. The alloy with x=3 (Ho6Fe20Co3) had better discharge capacity, HRD and plateau pressure at discharge current density of 150 mA/g.