Last Update 05/ 01/ 2005
in Esperanto/ in English/ in Portuguese
You are invited to click in the figure either at first on a Miller indices button and then on the matching button with the three letters, either in the reverse sequence. If a smiling face is issued it means the correct Miller indices for that respective octahedron face plane marked with the same letters on the distorted perspective figure was selected, according to the given orientation. The Cartesian axes are presented in white and the positive side is indicated by x, y and z. Only the 18 first wrong matches of Miller indices and plane are scored by unhappy faces. The standard time is displayed after the game is done, when the complete set of 8 planes was correctly indexed.
Exercises
1) Write the Miller indices of an octahedron face plane parallel to plane (1 1 1).
2) Can you find the Miller indices of an octahedron face plane perpendicular to plane (1 1 1)?
3) What are the Miller indices of all the octahedron face planes obtained by a 4 fold axis operating over plane (1 1 1)?
4) Write the Miller indices for the two sets containing 3 octahedron face planes related by the 3 fold axis normal to face plane (1 1 1).
Please send your comments.
Table of subjects.