Patent ID: 9388336
Filing Date: 2016-07-12
CPC Classification: C09K,H01L

Claim Text:
1. A process for preparing a color stable Mn 4+ doped complex fluoride of formula I, the process comprising contacting a first aqueous HF solution comprising (1−m) parts of a compound of formula H a second aqueous HF solution comprising m*n parts of a compound of formula A to yield a precipitate comprising the color stable Mn wherein A is Li, Na, K, Rb, Cs, NR M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; X is an anion; a is the absolute value of the charge of the X anion; x is the absolute value of the charge of the [MF y is 5, 6 or 7; 0<m≦0.05; 0.1≦n≦1.