In another embodiment, oxides or other oxygen containing compounds of said first element, said second element, cerium, and terbium are dissolved in an acidic solution to form {HEAD ~ the first solution}, such as hydrochloric acid, nitric acid, sulfuric acid, citric acid, or {TAIL ~ acetic acid} 
such as
In another embodiment , oxides or other oxygen containing compounds of said first element , said second element , cerium , and terbium are dissolved in an acidic solution to form { HEAD ~ the first solution } , such as hydrochloric acid , nitric acid , sulfuric acid , citric acid , or { TAIL ~ acetic acid }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL