SULFIDE SOLID ELECTROLYTE POWDER AND ELECTRODE MIXTURE

A sulfide solid electrolyte powder includes a crystal phase. A value represented by [(strain value−0.001)/specific surface area (m/g)]×100 is 0.010 to 0.070, and the crystal phase comprises an argyrodite crystal structure. The sulfide solid electrolyte powder may further include an amorphous phase, and a content ratio of the amorphous phase may be 5 mass % or more.