Figure 1: Crystal structure of Pt2MnGa.
From: Room-temperature tetragonal non-collinear Heusler antiferromagnet Pt2MnGa

Rietveld refinement of the room-temperature XRD pattern assuming a tetragonal unit cell with I4/mmm symmetry. Black, red and green lines correspond to the observed, calculated and difference patterns, respectively. The blue ticks indicate the Bragg peak positions. A sketch of the unit cell is shown in the inset: red, yellow and grey spheres indicate Mn, Ga and Pt atoms in 2a, 2b and 4d Wyckoff positions, respectively.