en2015-08-18 18:10 PM CESThttp://inspire.ec.europa.eu/codelist/CommodityCodeValue/thulium:1http://inspire.ec.europa.eu/codelist/CommodityCodeValue/thuliumThulium is a chemical element that has the symbol Tm and atomic number 69. It is the thirteenth and antepenultimate element in the lanthanide series - http://en.wikipedia.org/wiki/Thulium