Be4Si2O7(OH)2 is a chemical compound known as beryllium silicate hydroxide. It consists of beryllium (Be), silicon (Si), oxygen (O), and hydroxide (OH) ions. This compound is part of a group of minerals that contain beryllium, which is a lightweight metal often used in aerospace applications due to its strength and thermal stability. The structure of Be4Si2O7(OH)2 features a framework of silicate tetrahedra and beryllium coordination polyhedra. It is of interest in mineralogy and materials science, particularly for its potential applications in ceramics and glass. Understanding its properties can contribute to advancements in materials science and geology.