ditions and (ii) ignored other gases (e.g., CO 2 ) that could be present and compete for adsorption sites. Third, our gas adsorption measurements were single-component, in contrast to the mixed-gas setting if the Ni(PyC-m-NH 2 ) 2 MOF were to be deployed for noble gas separations. Fourth, Ni(PyC-m-NH 2 ) 2 lacks robust water stability, but e.g., for the application of capturing Xe from SNF reprocessing off-gases, the gas stream is relatively dry.