geomaterials that do not contain the elements
Source:R/mindat_geomaterials.R
geomaterials_not_contain_elems.Rd
retrieve the geomaterials that do not contain any of the given elements.
Examples
if (FALSE) { # \dontrun{
df <-geomaterials_not_contain_elems (c('Fe','S', 'O'), fields ="id,name,mindat_formula,elements")
} # }