English: This image depicts a single chain of silica tetrahedra in the structure of a pyroxene mineral, viewed in the [010] direction. The apical oxygen ions are a top and the tetrahedra bases at bottom. The silicon ions are just visible as small black spheres in the center of the further tetraheda; the view of the silicon ion is blocked by an oxygen ion in the near tetrahedra.
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Captions
A single chain of silica tetrahedra in the structure of a pyroxene crystal, viewed in the [010] direction