python36-periodictable Subpackage of python-periodictable

This package provides a periodic table of the elements with support for mass, density and xray/neutron scattering information. Masses, densities and natural abundances come from the NIST Physics Laboratory, but do not represent a critical evaluation by NIST scientists. Neutron scattering calculations use values collected by the Atomic Institute of the Austrian Universities. These values do corresponding to those from other packages, though there are some differences depending to the tables used. Bound coherent neutron scattering for gold in particular is significantly different from older value: 7.63(6) as easured in 1974 compared to 7.90(7) as measured in 1990. X-ray scattering calculations use a combination of empirical and theoretical values from the LBL Center for X-ray Optics. These values differ from those given in other sources such as the International Tables for Crystallography, Volume C, and so may give different results from other packages..

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