These elements are vanadium, rubidium, indium, lanthanum, europium, rhenium and lutetium. These elements are vanadium, rubidium, indium, lanthanum, europium, lutetium, and rhenium. All the trivalent lanthanide ions, except lanthanum and lutetium, have unpaired f electrons. Three group 3 elements occur naturally&colon; scandium, yttrium, and either lanthanum or lutetium. They are commonly lanthanum and actinium, and less often lutetium and lawrencium. Its melting and boiling points are also significantly lower than those of thulium and lutetium. All patients received lutetium Lu 177 dotatate with octreotide. Aside from stable lutetium, its radioactive isotopes have several specific uses. Soluble lutetium salts are mildly toxic, but insoluble ones are not. The band gap of lutetium oxide is 5.5 eV. Zircon also has an extremely low Lu/Hf ratio, making any correction for initial lutetium minimal. Despite this, his chosen name "lutetium" was adopted. Lawrencium, as an analogue of lutetium, would presumably display like characteristics. Pure lutetium metal is very difficult to prepare. In other tables, lutetium and lawrencium are the remaining group 3 members.