Allanite
CaREE(Al2Fe2+)[Si2O7][SiO4]O(OH) (where REE = Ce, La, or Y) Allanite is a relatively common phosphate mineral that contains rare earth elements....
CaREE(Al2Fe2+)[Si2O7][SiO4]O(OH) (where REE = Ce, La, or Y) Allanite is a relatively common phosphate mineral that contains rare earth elements....