1 | INTRODUCTION Cordierite (2MgO•2Al 2 O 3 •5SiO 2) is one of the most important phases of the MgO-SiO 2-Al 2 O 3 system, having a low coefficient of thermal expansion, excellent thermal shock resistance, low dielectric constant, high resistivity, high chemical resistance, high refractoriness, and high mechanical strength. 1-7 Cordierite-based materials are used in various industrial fields in applications such as refractories, heat insulation, filters, membranes, heating elements, microwave and electromagnetic wave absorbers. 8 There are various methods used to synthesize cordierite, among which solid-state reaction, sol-gel, and glass crystallization stand out. 9 Cordierite synthesis by solid-state reaction is considered to be the most widely used in industry due to its simplicity and low cost. 10 Regarding the formation of cordierite by solid-state reaction, some researchers 11 described this reaction as occurring through two well-defined steps. In the first step, cordierite begins to form at 1100°C, between mullite, enstatite, and cristobalite, and reaches a peak at 1275°C. In the second stage, previously formed cordierite reacts through a differential fusion mechanism with enstatite and cristobalite, forming a liquid at around 1330°C to 1355°C. This liquid is made up of eutectic cordierite-enstatite-silica. With increasing temperature, the liquid begins to react with the remaining