Mirabilite is a naturally occurring mineral composed of sodium sulfate decahydrate, with the chemical formula Na2SO4·10H2O. It typically forms in evaporative environments, such as salt lakes and saline soils, where water evaporates and leaves behind crystalline deposits. The mineral is often found in a white or colorless form and can appear as large, transparent crystals. Mirabilite is commonly known as Glauber's salt and has various applications, including use in the production of glass, detergents, and as a laxative in medicine. It is also studied for its potential in energy storage due to its ability to absorb and release water.