Crystal Models

This set is dual-scale and contain a wide range of elements and atom-parts hybrisations, and links of all types to make both open and compact models. This is a comprehensive set designed to cover organic stereochemistry, complex-ions, for school or university use. A good choice for the one-set...

This set is dual-scale and contain a wide range of elements and atom-parts hybrisations, and links of all types to make both open and compact models. This is a comprehensive set designed to cover organic stereochemistry, complex-ions, for school or university use.

Cellulose is found in plants as microfibrils. These form the structurally strong framework in the cell walls. Cellulose has many uses as an anticake agent, emulsifier, stabilizer, dispersing agent, thickener, and gelling agent but these are generally subsidiary to its most important use of...

Al2(OH)4Si2O5

Sanidine is the high temperature form of potassium feldspar. Sanidine most typically occurs in felsic volcanic rocks such as obsidian, rhyolite and trachyte. Sanidine crystallizes in the monoclinic crystal system. Due to the high temperature and rapid quenching, sanidine can contain more sodium...

ZnO

Set of 3 Carbon Models, consisting one of each model, Diamond, Graphite and Buckminster Fullerene. Price represents a $70 savings from the price if the models had been ordered individually.

The Klinger set of nine basic crystal structures is a valuable teaching aid for physics and chemistry. Similar patterns of atomic arrangement reappear in large numbers of different substances. Three of the six symmetry systems are represented in the set.

The set of 14 Bravais space lattices was designed for use in the teaching and study of fundamental lattice types. Bravais space lattices represent the 14 basic lattice types from which according to Bravais, practically all natural crystals originate. The models have an edge length of...

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...

TiO2

CaCO3

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...

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...

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...

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. ...

Al2O3

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...

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...

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 ½ the diagonal of the cube. A unit cell of sodium chloride thus has sodium atoms in the corners and face-centered and...