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Given a basic understanding of symmetry operations (Chapter 11) we now examine symmetry using stereographic projections. Two types of symmetry are discussed: point symmetry and space symmetry. Point symmetry relates to mineral shapes (morphology) while space symmetry relates to the atomic arrangement of minerals.
Topics covered in Chapter 12 include: Stereographic Projections Point Symmetry Operations Groups of Point Symmetry Operations Relating Point Symmetry Operations to Crystal Systems Naming Point Groups The 32 Point Groups: Organizing Collections of Point Groups into Crystal Systems Unit Cells Bravais Lattices Naming Planes and Lines in Crystals Space Symmetry Space Groups