HALIDE SOLID ELECTROLYTE MATERIAL AND BATTERY USING THIS

A halide solid electrolyte material according to the present disclosure is represented by the chemical formula Li(ZrM)X (I), wherein M denotes at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, X denotes a halogen element, and two mathematical formulae 0 < a < 1 and 0 < b < 1.5 are satisfied.