SOLID ELECTROLYTE, ELECTRODE MATERIAL, LITHIUM-ION BATTERY, AND METHOD FOR PRODUCING SOLID ELECTROLYTE

A solid electrolyte according to the present disclosure includes Li, Ti, M, and F. The M is at least one selected from the group consisting of Mg, Ca, Sr, Ba, Sc, Y, Al, Ga, In, Zr, and Sn. In an X-ray diffraction pattern obtained by X-ray diffraction measurement using Cu Kα radiation, a ratio of an intensity of a peak present in a diffraction angle 2θ range from 40° to 43° to an intensity of a peak present in a diffraction angle 2θ range from 19° to 23° is 1.0 or more and 3.3 or less.