page_title: Silicon–oxygen tetrahedron
section_title: Double chains
hierarchical_section_title: Silicon–oxygen tetrahedron / Silicon–oxygen tetrahedra links / Double chains
context_page_description: A silicon–oxygen tetrahedron is the SiO₄ anionic group, or a silicon atom with four surrounding oxygen atoms arranged to define the corners of a tetrahedron. This is a fundamental component of most silicates in the Earth's crust. A variety of silicate minerals can be identified by the way that the tetrahedra links differ, also by the cations present in the mineral.
context_section_description: Double-chain silicates occur when tetrahedra form a double chain (not always but mostly) by sharing two or three oxygen atoms each. Common minerals for this group are amphiboles.
caption: Double chain tetrahedra.
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