Phase equilibria in the Dy–Fe–In system and crystal structure of Dy6Fe1.72In

The phase equilibria of the Dy–Fe–In system were investigated in the whole concentration range and the isothermal section was constructed at T = 870 K, employing X-ray powder and single crystal diffraction analyses. One ternary compound, namely Dy6Fe1.72In, exist in the Dy–Fe–In system at this temperature. The crystal structure of new indide was determined by X-ray single crystal diffraction. The Dy6Fe1.72In compound crystallize in Ho6Co2Ga structure type (space group Immm, cell parameters a = 9.373(2), b = 9.458(2), c = 10.208(2) Å, R1 = 0.0372; wR2 = 0.0384). The iron sites show partial occupancy in the structure of this compound.

Figure optionsDownload as PowerPoint slideHighlights
► Isothermal section of Dy–Fe–In system at T = 870 K.
► Crystal structure of new ternary indide Dy6Fe1.72In.
► The Dy6Fe1.72In compound crystallize in Ho6Co2Ga structure type.
► The iron sites show partial occupancy in the structure of this compound.
► The existence of Fe2 dumb-bells in the structure of Dy6Fe1.72In compound is described.