term,name,definition,category,provenance,provenance_uri,note thulium,Thulium,"Thulium is a chemical element with symbol Tm and atomic number 69. It is the thirteenth and third-last element in the lanthanide series. Like the other lanthanides, the most common oxidation state is +3, seen in its oxide, halides and other compounds; because it occurs so late in the series, however, the +2 oxidation state is also stabilized by the nearly full 4f shell that results.",,Wikipedia,https://en.wikipedia.org/wiki/Thulium,Added to support Critical Zone Observatory (CZO) data use cases.