| PackageDescription | Extensible periodic table of the elements (common documentation)
This package provides a periodic table of the elements with support
for mass, density and xray/neutron scattering information.
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Masses, densities and natural abundances come from the NIST Physics
Laboratory, but do not represent a critical evaluation by NIST
scientists.
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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 measured in 1974 compared to 7.90(7) as measured in 1990.
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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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This is the common documentation package. |