Novel aluminide CePt3−xAlx of the CeNi3 type structure, with 0.61 < x < 0.81

This article reports on the synthesis and crystal structure of CePt3−xAlx (x = 0.73). According to single crystal diffraction data, CePt2.27(1)Al0.73(1) compound crystallizes with the CeNi3 - type, space group P63/mmc, lattice parameters: a = 5.5634(5) Å, c = 16.6658(13) Å, Z = 6, R1 = 0.033 for 385 reflections (I > 2σ(I)). The CePt3−xAlx compound possesses homogeneity range extends a 0.61 < x < 0.81, as two crystallographic positions occupied with a mixture of Pt and Al atoms.