Source: idf/trk_idf/species_name.pro
species_name Return the full name of a species from its symbol. Usage: name = species_name(species) Argument: species string Symbol or symbols of the species to be expanded. Keyword: symbol If set, then return symbols for names Notes: Only handles the regular TRK/PHA defines species and a few others. History: Original: 4/2/00; SJT Add electrons: 7/6/00; SJT Add symbol key: 8/6/00; SJT