FRECCERO , R.

The crystal structures of R4CuMg (R––Ca, Eu, Yb) complex intermetallics, solved by single crystal X-ray diffraction, were found to represent a new trigonal prototype (hR144-h7c2ba, space group R 3 m), being the first examples of 4:1:1 rare earth-rich phases not crystallizing as cF96-Gd4RhIn, adopted by more than 200 compounds known so far. The...

Phases and equilibria involved in the isothermal section at 500 degrees C of the ternary Al-Fe-Pr system have been here investigated in the whole composition range by means of X-ray diffraction, optical and scanning electron microscopy, and electron probe microanalysis. Phase equilibria are characterised by the formation of two binary solid...

The Al-Co-Nd isothermal section at 500 C has been investigated in the whole composition range by means of x-ray diffraction, optical and scanning electron microscopy and electron probe microanalysis. The following ternary phases have been identified or confirmed: s1-Nd4 CoAl (cF96-Gd4RhIn), s2-NdCo2Al8 (oP44-CeFe2Al8), s3-NdCo3Al11 (unknown),...

A systematic study on the existence of R2Pd3Ge5 intermetallics with heavy rare earth metals (R = Gd–Lu) was conducted; only the Yb2Pd3Ge5 was revealed to exist. Its crystal structure was established by X-ray powder diffraction and refined by means of Rietveld method. This compound crystallizes in the orthorhombic U2Co3Si5 structure type (Ibam,...