Data Sources
- Physical constants
- NIST Physics Laboratory - Constants, units and uncertainty
- Atomic and isotope mass
- NIST Physics Laboratory - Atomic weights and isotope composition
- 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
- Crystal structure
- Ashcroft and Mermin
