|Abstract: ||A stabilized scintillator includes a compound corresponding to formula
(2) or (3), or activated derivatives thereof:
A.sub.2BB'.sub.xB''.sub.yX.sub.6 (2) A.sub.2BB'X.sub.xX'.sub.y (3)
wherein A and B are monovalent cations, B' is a trivalent cation, X is a
halogen, x and y are molar percentages, x+y=1; B'' is an aliovalent
exchange cation that has a different valence than B', X' is an aliovalent
exchange anion that has a different valence than X. A method of preparing
the stabilized scintillator is also disclosed.