Crystal Models
| People who can visualize a crystal structure in three dimensions are rare. A model showing the relative positions of the atoms viewed from any angle is an invaluable aid for teachers, students are researchers. |
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KS7998 Supplementary Set of 18 Lattice Menzer Models
Supplementary set of 18 lattices, according to Prof. Menzer. (Supplementing the translational Bravais lattices.) Models are approximately 20 cm high. Primitive cells are identified by means of colored rods. Models are constructed to the same specifications as the KS7997 and may be ordered as a...
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KS7999 Ball and Spoke Set
KS7999 Ball and Spoke Set, is designed to teach the elements of symmetry and demonstrate elementary structures to students. It contains 25 red 25 gray wooden balls, 1" in dia. with 26 holes in each, 75 slits spokes 1 1/2" long and 25 spokes 2 1/2" long. Other color balls may be supplied on request.
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KS8011 Calcite (1/2 unit cell) Crystal Model
This structure is derived from the NaCl structure by replacing Na with Ca and Cl with CO3 radical so that the plane of the O3 is at right angles to the cube diagonal. As a result, more space is taken up in directions at right angles to the diagonal, this causing a dilation, and the cube is...
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KS8016 Carbon Dioxide Crystal Model
This structure occurs in most metals. The unit cell is a cube having 4 CO2 molecules. This lattice is a face-centered structure with each Co2 molecule surrounded by 12 equidistant neighbors. If the atomic radii are considered to extend until the atoms are in contact with one another, it then...
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KS8025 Copper Crystal Model
The unit cell is a cube having atoms in the 8 corners and in the centers of the 6 cube faces, hence the name �face-centered.� Each atom in the corners is shared by the 8 unit cells meeting in that corner, and each atom on a cube face is shared by the two unit cells having that face in common....
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KS8028 Diamond Crystal Model
Each atom of the diamond is surrounded by four atoms directed in space toward the vertices of a tetrahedron. The hardness and large density of the diamond can be explained from the compactness and rigidity of its structure. Because the diamond is a macromolecule, it has an extremely high...
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KS8035 Graphite II (Hexagonal) Crystal Model
Graphite, a low temperature dimorphic form of carbon, belongs to the hexagonal crystal system. Various physical properties may readily be explained from its structure. Carbon atoms are tightly arranged in hexagonal layers with distances between adjacent atoms in one layer considerably less than...
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KS8041 Magnesium Crystal Model
This structure is a typical example of hexagonal close-packing. The unit cell is a parallelepiped with two axes which enclose an angle of 120�. The structure has one atom in each corner of the unit cell and one atom inside it. The atom inside the cell is in the center of one of the two...
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KS8064 Sodium Chloride Crystal Model
Considered independently of one another, the sodium atoms (grey) form a cubic face-centered lattice as do the chlorine atoms (green). They are displaced from one another by � the diagonal of the cube. A unit cell of sodium chloride thus has sodium atoms in the corners and face-centered and...
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