Education and demonstration – Science – Chemistry or metallurgy
Patent
1997-12-02
1999-07-13
Nguyen, Kien T.
Education and demonstration
Science
Chemistry or metallurgy
434300, 434211, 434188, 446122, G09B 100, A63H 3312
Patent
active
059217812
ABSTRACT:
A three-dimensional instructional model used to exhibit and represent specific point groups used in the application of group theory to symmetry operations and molecular structure. A pair of blocks, each have a pair of spaced faces with peripheral side surfaces extending between the faces, the number of side surfaces being equal to the principal rotational axis order of the point group to be represented. The blocks are connectable to one another with a face of each of the blocks opposing. The connection between the blocks can be made using a circular shaft inserted through openings in the blocks, by pins inserted in holes in abutting opposing faces of the blocks, or by adhering the face of one block directly to the face of the other to hold them rigidly in engagement with each other. The interconnection can also be made using a rotational locking mechanism allowing the blocks to rotate with respect to one another. A number of pegs are located in peg openings disposed in the side surfaces of each block, the pegs representing asymmetric units contained in each point group that are repeatable as the point group has the symmetry operations associated with the particular point group performed on it. The pegs can be either removably or permanently contained within the peg openings depending upon the flexibility desired for the model.
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Nguyen Kien T.
Priddy Michael B.
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