This package is in the public domain. Individual files may hold separate copyright and licensing terms. See the file header for details.


This data has been compiled from a variety of sources for the user’s convenience and does not represent a critical evaluation by the authors. While we have made efforts to verify that the values we use match published values, the values themselves are based on measurements whose conditions may differ from those of your experiment.


Periodictable was written by Paul Kienzle with contributions from the DANSE project.

The DANSE/Reflectometry team is supported by the University of Maryland Department of Materials Science and Engineering, the NIST Center for Neutron Research and the US National Science Foundation grant DMR-0520547. Any opinions, findings and recommendations expressed in this material are those of the author(s) and do not necessarily reflect the view of the supporting institutions.

We are grateful for the existence of many fine open source packages such as Pyparsing, NumPy and Python without which this package would be much more difficult to write.