Patent ID: 7713442

Claim:
A phosphor having a formula of (M1 x ,M2 1−x ) 6 (SiO 4 ) 2 X 4 :A, wherein: M1 and M2 are each independently at least one metal ion selected from the group consisting of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , Zn 2+ and Cd 2+ ; x is a value from about 0.001 to about 1; X is at least one halide ion in ionic form; and A is at least one activator ion selected from the group consisting of Eu 2+ , Yb 2+ , Mn 2+ , Bi 3+ , Pb 2+ , Ce 3+ , Nd 3+ , Pr 3+ , Sm 3+ , Eu 3+ , Gd 3+ , Tb 3+ , Dy 3+ , Ho 3+ , Er 3+ , Tm 3+ and Yb 3+ .