.. _data-sources:

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Data Sources
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Physical constants
    `NIST Physics Laboratory - Constants, units and uncertainty <https://www.nist.gov/pml/fundamental-physical-constants>`_

Isotope mass
    `IAEA Atomic Mass Data Center AME2020 <https://www-nds.iaea.org/amdc/>`_

Atomic weight and isotope abundance
    `IUPAC commission on isotope abundances and atomic weights <https://www.ciaaw.org>`_

Atomic density
    *ILL Neutron Data Booklet*

Covalent Radii
    Cordero, et al., Dalton Trans., 2008, 2832-2838, `doi:10.1039/801115j <https://doi.org/10.1039/b801115j>`_

Magnetic form factors
    Brown. P. J., In *International Tables for Crystallography, Volume C*, Wilson. A. J. C (ed), section 4.4.5

Neutron scattering factors
   `Atomic Institute for Austrian Universities <http://www.ati.ac.at/~neutropt/scattering/table.html>`_

X-ray scattering factors
   `Center for X-Ray Optics <https://henke.lbl.gov/optical_constants/>`_

Neutron activation
    `IAEA (1987) Handbook on Nuclear Activation Data. TR 273 (International Atomic Energy Agency, Vienna, Austria, 1987). <https://cds.cern.ch/record/111089/files/IAEA-TR-273.pdf>`_

    Shleien, B., Slaback, L.A., Birky, B.K., (1998).
    *Handbook of health physics and radiological health*.
    Williams & Wilkins, Baltimore.

Isotope half-life
    `NUBASE2020 <https://www.anl.gov/phy/reference/nubase-2020-nubase4mas20>`_

    Kondev, F.G.; Wang, M.; Huang, W.J.; Naimi, S. and Audi, G. (2021).
    *The NUBASE2020 evaluation of nuclear physics properties.*
    Chin. Phys. C45, 030001.
    `doi:10.1088/1674-1137/abddae <https://doi.org/10.1088/1674-1137/abddae>`_

Crystal structure
    Ashcroft and Mermin

Oxidation states
    wikipedia: List of oxidation states of the elements

    Greenwood, Norman N.; Earnshaw, Alan (1997). *Chemistry of the Elements*,  2nd ed.
    Butterworth-Heinemann. pp. 27–28. ISBN 0-08-037941-9.

FASTA and biomolecule formulas
    Perkins (1988), *Modern Physical Methods in Biochemistry Part B*, 143-265.
