Fig. 5: Structural phase transition from monoclinic to rhombohedral symmetry driven by biaxial stress in bulk α-RuCl3.
From: Pressure-tuning of α-RuCl3 towards a quantum spin liquid

Reconstructed reciprocal space maps parallel to the 4–2l-plane (family 2) for the stress-free sample 1 (a),(b), and the sample 2 under biaxial stress (c), (d) are shown. Peaks at l = n − 1/3 and l = n signal a cubic and a hexagonal closed chlorine packing, respectively.