trigonal system: Quick Facts

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Facts

Also Known As	rhombohedral system

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Trigonal system

Diagram showing the seven primitive crystal systems with labeled 3D shapes: isometric (cubic), tetragonal, orthorhombic, hexagonal, triclinic, monoclinic, and rhombohedral (trigonal), each with axis orientation and a brief description of their geometric properties.

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rhombohedron hexagonal system