OXIDE, METHOD FOR PRODUCING SAME, SOLID ELECTROLYTE, AND POWER STORAGE DEVICE

The present invention provides a novel zirconium phosphate-based oxide exhibiting high Li conductivity and a method for producing the oxide. The present invention further provides a solid electrolyte and a power storage device using the oxide. An oxide satisfying formula (1) below: LiM1ZrM2M3PO. . . (1) (in formula (1), M1 contains Fe or In, M2 contains Si, M3 contains W, and x>0, y≥0, z≥0, and y+z>0 are satisfied).