Powder diffraction data of a new compound Al_0.35GdGe₂

Abstract

A new ternary compound Al0.35GdGe2 has been synthesized and studied by means of X-ray powder diffraction technique. The ternary compound Al0.35GdGe2 crystallizes in the orthorhombicwith the CeNiSi2 structure type (space group Cmcm, a=4.0874(2) Å, b=16.1499(5) Å,c=3.9372(1) Å, Z=4, and Dcalc=8.007 g/cm3).

Isothermal section of the Al–Dy–Ge ternary system at 673K

“…A total of seven type intermetallic compounds in the RE-Al-Ge systems have been reported in references, i.e., REAlGe (RE = Y, La-Nd, Sm, Eu-Er, Lu) [10], RE 2 Al 3 Ge 4 (RE = La-Nd, Sm, Gd-Er) [10] RE 2 AlGe 6 (RE = La-Nd, Sm, Gd) [10], REAl 2 Ge 2 (RE = Y, La, Ce, Eu, Gd, Er, Yb) [10-13] RE 2 AlGe 3 (RE = Y, La, Nd, Sm, Tb, Dy, Ho, Er, Tm) [10,[14][15][16], REAl 3−x Ge x (RE = Gd, Tb, Ho, X = 0.10-0.30) [17], REAl x Ge 2 (RE = Y, Gd, Dy, Ho, Er, X = 0.27-0.35) [18][19][20][21][22], and RE 2 AlGe 2 (RE = Gd, Dy) [23,24].…”

The X-ray powder diffraction data for CeCo3Ni2

“…The obtained values of the Bragg angle, 2 θ , were calibrated for instrumental errors using a parabolic fit with reference material SRM Si. Once the 2 θ values were corrected, precise lattice parameters were obtained by a least-squares refinement (Zeng et al , 2007). The observed intensity (peak heights) of each diffraction peak was determined from the XRD data of a pure CeCo 3 Ni 2 sample.…”

Crystal structures of the compounds GdAl0.09Ge2.07 and Gd2AlGe3

“…The structure of GdAl 0.09 Ge 2.07 is isopointal to the structure of the compound GdAl 0.35 Ge 2 . In the latter (CeNiSi 2 type, oS16, Cmcm) two of the three sites of small atoms are fully occupied by Ge atoms and one site is partly occupied by Al atoms (35 %) [7]. In the case of GdAl 0.35 Ge 2 , the sample was annealed at 600°C and we do not exclude the existence of a certain homogeneity range (including the compositions GdAl 0.09 Ge 2.07 ≡ Gd 32 Al 3 Ge 65 and GdAl 0.35 Ge 2 ≡ Gd 30 Al 10 Ge 60 ), within which a slight redistribution of the atoms takes place.…”