| abstract |
Compositions are generally provided that include an oxyfluoride compound. In one embodiment, the oxyfluoride compound has the formula: NaCa 2−x A x GeO 4−z F 1−y N z where A is Ba, Sr, or a mixture thereof; 0.01≦x≦0.1; 0≦y≦0.2; and 0≦z≦0.1. Methods of forming such compounds are also generally provided. |