The figure shows seven buttons with a selection of Miller indices of crystallographic planes capable of showing the respective stereographic projection by a mouse click. The first 4 buttons, starting with (1 0 0) represent cube faces, oriented with two faces perpendicular to the North-South axe (NS) of the spherical projection preceding the stereographic, represented by (0 0 1) indices and by the next one. The button (1 1 0) represents a dodecahedron face parallel to the axe NS mentioned and intercepts the other referential axes at the same distance in relation to the origin. The button (1 1 1) represents a octahedron face, it intercepts the 3 referential axes at the same distance from origin. The following button, last of the sequence, represents another face of the octahedron, it intercepts also the 3 referential axes at the same distance from origin, but in the negative part of the third referential axe (coinciding with the NS) and in the positive part of the other two. Among the seven faces of the figure represented by the Miller indices which ones are parallel and which ones are perpendicular? Table of subjects. Presentation Chemistry Analytical Chromatography Elemental organic analysis Volumetric analysis, simulation Crystallography 3 fold screw axis 4 fold inversion axis on tetrahedron 5 fold rotation axis absent in crystallography Binary axis and reflection plane in stereographic projection Bravais lattices Conic sections under symmetry operators Converting from spherical coordinates to stereographic projection Crystal lattice and unit cell Determination of unit cell Elements of symmetry in action – animation Elements of symmetry in action – cube game Elements of symmetry in action – dodecahedron game Elements of symmetry in action – icosahedron game Elements of symmetry in action – octahedron game Elements of symmetry in action – tetrahedron game Ewald sphere and crystal measurements Extinctions Five classes in the cubic system Five classes in the rhombohedral system From tetrahedron to prism Gnomonic projection Improper symmetry axis Miller indices Miller indices – animation Miller indices – cube game Miller indices – octahedron game Miller indices – rhombic dodecahedron game Miller indices – tetrahedron game Mirror plane Orientations of the cube Plane symmetry groups Question on point group Rotation axis in octahedron and Werner compounds Rotation axis on tetrahedron and organic molecules Rotation of the parallel and stereographic projections of the cube Seven faces in stereographic projection Seven classes in the hexagonal system Seven classes in the tetragonal system Six elements of symmetry in seven orientations Spherical projection of the octahedron Stereographic projection Stereographic projection of six polyhedra in different orientations Straight line equations and symmetry elements Symmetry, 2 fold axis Symmetry, 2, 3 and 6 fold axis in benzene Symmetry, 3 fold axis in the cube Symmetry, 4 fold axis in the cube Symmetry, 4 fold axis in the unit cell of gold Symmetry elements and Miller indices game Symmetry elements and Miller indices game – octahedron Symmetry in art and in crystallography Three classes in the monoclinic system Three classes in the orthorhombic system Twin crystals Two classes in the triclinic system Unit cell in hexagonal net General Butane conformations Density Electrochemical cell Ethane conformations Resources of chemical-ICT: water, health and symmetry Solid and liquid gold Source.