# Data Sources

Physical constants

  NIST Physics Laboratory - Constants, units and uncertainty

Isotope mass

  IAEA Atomic Mass Data Center AME2020

Atomic weight and isotope abundance

  IUPAC commission on isotope abundances and atomic weights

Atomic density

  ILL Neutron Data Booklet

Covalent Radii

  Cordero, et al., Dalton Trans., 2008, 2832-2838, doi:10.1039/801115j

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

X-ray scattering factors

  Center for X-Ray Optics

Neutron activation

  IAEA (1987) Handbook on Nuclear Activation Data. TR 273 (International Atomic Energy Agency, Vienna, Austria, 1987).

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

Isotope half-life

  NUBASE2020

  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

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.