It does not take the. place of talking to your doctor or. pharmacist. The information in this leaflet was. last updated on the date listed on the. final page. More recent information. on the medicine may be available.
Yttrium never occurs in nature as a free element. It is found in almost all rare earth minerals and in uranium ores. The yellow-brown ore xenotime can contain as much as 50% yttrium phophate (YPO4) and is mined in Malaysia.
Yttrium has an exceptionally high affinity for oxygen, with a free energy of formation for the oxide of 1817 kJ mol -1, probably the greatest of any element. Yttrium also dissolves oxygen gas in relatively high concentrations.