SOLID ION CONDUCTOR, SOLID ELECTROLYTE AND ELECTROCHEMICAL DEVICE INCLUDING THE SAME, AND METHOD OF PREPARING THE SOLID ION CONDUCTOR

A solid ion conductor, a solid electrolyte and an electrochemical device each including the same, and a method of preparing the solid ion conductor are disclosed. The solid ion conductor may include a compound represented by Formula 1: LiMInX Formula 1 In Formula 1, M is at least one of a metal having an oxidation state of +1, or a metal having an oxidation state of +3, X is at least one halogen, 2.5