Method for manufacturing phosphor powder, phosphor powder, and light emitting device

A method for manufacturing a phosphor powder which contains an inorganic compound in which Eu as an activator is solid-soluted in a crystal represented by Ba26Si51O2N84 or in an inorganic crystal having the same crystal structure as the crystal represented by Ba26Si51O2N84, the method comprising:

• a mixing step of mixing a raw material containing each element constituting the inorganic compound to obtain a raw material mixed powder blended such that b=51 and a/b>(26−c)/51 are satisfied when molar ratios of Ba, Si, and Eu in the raw material mixed powder are respectively a, b, and c;
• wherein the raw material mixed powder blended such that 0.60<a/b<1 is satisfied by a and b is obtained in the mixing step,
• a firing step of firing the raw material mixed powder to obtain a fired product;
• and
• a cleaning treatment step of subjecting the fired product to an acid treatment and/or a water treatment.