SULFIDE SOLID ELECTROLYTE MATERIAL, SULFIDE GLASS, SOLID STATE LITHIUM BATTERY, AND METHOD FOR PRODUCING SULFIDE SOLID ELECTROLYTE MATERIAL

A sulfide solid electrolyte material having a high Li ion conductivity is provided. A sulfide solid electrolyte material includes Li, P, I and S, having peaks at 2θ=20.2° and 23.6°, not having peaks at 2θ=21.0° and 28.0° in an X-ray diffraction measurement using a CuKα ray, and having a half width of the peak at 2θ=20.2° of 0.51° or less.