compositional family of metal–organic frameworks Zn1− xCdx (mIm) 2 (HmIm= 2-
methylimidazole). We find complete miscibility for all compositions x, with evidence of
inhomogeneous distributions of Cd and Zn that in turn affect framework aperture
characteristics. Using variable-temperature X-ray powder diffraction measurements, we
show that Cd substitution drives a threefold reduction in the magnitude of thermal expansion …