Fig. 4
From: The effect of Fe incorporation on the single-crystal elasticity of δ-AlOOH
Elastic stiffness coefficients (cij) of δ-(Al,Fe)OOH single crystals at room conditions plotted as a function of the Fe/(Al + Fe) molar ratio. a c11, c22 and c33; b c44, c55 and c66; c c12, c13 and c23. Solid symbols are experimentally determined values, while solid lines result from linear fits to the experimental values. Literature data for Fe0 (solid squares) and Fe3 (solid circles) are from Wang et al. (2022) and Satta et al. (2024), respectively