Crystallography Physics 26 Materials 20 Materials science 17 Diffraction 15 Crystals 13 Chemistry 12 Surfaces (Physics) 10 Symmetry 10 Chemistry, Physical organic 9 Mineralogy 8 Chemistry, Inorganic 7 Engineering 7 Optical materials 7 Chemistry, Organic 5 Crystal growth 5 Data processing 5 Polymers 5 Anisotropy 4 Biochemistry 4 Bioinformatics 4 Computer security 4 Crystallography, Mathematical 4 Solid state physics 4 Thermoelectricity 4 X-rays 4 Geometry 3 Molecular crystals 3 Nanotechnology 3 Particles (Nuclear physics) 3