Patent ID: 7255812

Claim:
A method of making a haloapatite phosphor having a general formula represented by (Ca (1−x−y) Mn x Sb y ) 5 (PO 4 ) 3 (F (1−z−y) Cl z O y ), where 0<x<0.05, 0.004<y<0.01, and 0<z<0.1, the method comprising: (a) formulating a blend of ingredients to make the haloapatite phosphor, the ingredients including CaHPO 4 as a primary source of calcium and phosphorus; (b) partially substituting an amount of an equimolar combination of an ammonium phosphate compound and calcium carbonate for an equal number of moles of CaHPO 4 in the formulation; (c) combining the ingredients in their formulated amounts to form the blend; and (d) firing the blend to form the haloapatite phosphor.