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Geometry of Crystal Patterns
The Analysis of Crystals by Xrays
General Principles of Mineral Structures
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albite aluminium amphibole analcite angle aragonite atoms lie axes axial axis brucite C03 group calcite calcium atoms cations centre chains cleavage closest packing composition compounds contains coordination corners crystal cube cubic cyanite diagram diffracted diopside distance double sheet face-centred felspars figure formula four oxygen atoms framework glide plane hedra hexagonal hydroxyl indices ions isomorphous kaolinite Krist lattice layer linked tetrahedra magnesium metry mica minerals monoclinic NaCl neighbouring octahedral groups olivine orthoclase Orthorhombic parallel pattern perpendicular photographs positions projection pyrites pyroxene quartz reflection planes replaced rhombohedral rings rotation shown in Fig shows Si04 groups silicates silicon atoms silicon-oxygen sillimanite six oxygen atoms sodalite sodium space-group space-lattice spinel struc structure is shown sulphur atoms symmetry Taylor tetra tetragonal tetrahedra tetrahedral groups tion tremolite triclinic tridymite ture twinning unit cell valency vertices W. L. Bragg water molecules X-ray X-ray analysis Zeit.f zeolites