A list of data frames or table data frames (dplyr like), containing different information on isotopes.
A list of 6 tbl_df's or data frames, each constaining:
The symbol of an element from Mendeleev's periodic table.
String composed of the nucleon number and the symbol of element.
Isotope's Mass in Daltons.
The abundance of the isotopes. In case of enviPat data abundances do not sum to one. In case of all other, they do.
As in enviPat reference manual: "Maximum number of atoms of an element for one C-atom in a molecule, based on 99.99 % of case molecules".
R Package enviPat and Commission on Isotopic Abundances and Atomic Weights, CIAAW, http://www.ciaaw.org/index.htm.