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and the 3-dimensional lattice known as the "diamond lattice", which is the structure of the carbon atoms in a diamond crystal.  A vertex in the lattice which may be occupied by a spin is known as a "site". Thus spins occupy the sites of a lattice, but not every site must be occupied by a spin. A line joining two sites is called a "lattice bond".  One of the characteristic properties of a lattice geometry is the number of sites directly connected to a site. This is usually the same for all sites. If it is then that number is known as the coordination number of the lattice.[14]

Figure 2 and the 3-dimensional lattice known as the "diamond lattice", which is the structure of the carbon atoms in a diamond crystal. A vertex in the lattice which may be occupied by a spin is known as a "site". Thus spins occupy the sites of a lattice, but not every site must be occupied by a spin. A line joining two sites is called a "lattice bond". One of the characteristic properties of a lattice geometry is the number of sites directly connected to a site. This is usually the same for all sites. If it is then that number is known as the coordination number of the lattice.[14]