Scintillator and Radiation Detector

A method of producing a scintillator, comprising:

• a raw material mixing step of mixing raw materials to obtain a raw material mixture;
• and
• a synthesis step of subjecting the raw material mixture to heat treatment to obtain a synthetic powder;
• wherein the raw materials comprise at least HfO2 having a purity of 99.0 mol % or more, and
• wherein the scintillator is a scintillator represented by General Formula (1):
• QxMyO3z (1)
• wherein in General Formula (1), Q comprises at least two or more divalent metallic elements;
• M comprises at least Hf;
• and x, y, and z independently satisfy 0.5≤x≤1.5, 0.5≤y≤1.5, and 0.7≤z≤1.5, respectively.