Inosilicates are a group of silicate minerals characterized by their chain-like structures. These minerals consist of silicate tetrahedra linked together in one or two-dimensional chains. The basic building block is the silicate tetrahedron, which consists of a silicon atom surrounded by four oxygen atoms. Inosilicates can be further divided into two categories: single-chain and double-chain silicates. Single-chain inosilicates, such as pyroxenes, have chains of tetrahedra linked together by sharing two oxygen atoms. In contrast, double-chain inosilicates, like amphiboles, feature two interconnected chains of tetrahedra. These minerals are commonly found in igneous and metamorphic rocks, playing a significant role in the Earth's crust.