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

A solid ion conductor, a solid electrolyte and an electrochemical device including the solid ion conductor, and a method of preparing the solid ion conductor are disclosed. The solid ion conductor may include a compound represented by Formula 1: LiMM′ZrX Formula 1 wherein, M is one or more metals of Na, K, Cs, Cu, or Ag, and having an oxidation state of +1, M′ is one or more lanthanide metals having an oxidation state of +3 and a crystal ionic radius of about 104 picometers to about 109 picometers, X is one or more halogen elements, 1