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CRYSTAL CLASSES AXES AND SYSTEMS
CRYSTAL NOMENCLATURE AND CALCULATIONS
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2-fold axis anions anorthite beam bond called cation cell edges center of symmetry circle closest-packed coincide components composition coordination corners covalent crystal class crystal structure crystallographic axes cube cubic dashed diffracted direction electrons equal Equation example face poles Figure glide plane hence hexagonal identical identipoints indices interfacial angle intersection ionic isometric labeled layer liquid magnetic metal Miller indices minerals mirror plane monoclinic neighbors normal occur octahedral operation orbitals orientation orthoclase orthorhombic oxygens packing parallel percent phase plane of symmetry plot point group polar positive powder prism projection quartz radii reciprocal reflection refractive index relp represent respectively resultant rotation screw axis shell shown silicates Similarly solid solution space group sphere stereogram stereographic symbol symmetrically related symmetry plane temperature tensor tetragonal tetrahedral thermal triclinic trigonal twin unit cell vector vibration wavelengths X-ray zone