In the present study will be presented granite pegmatite class of nanomaterials. For this reason it will be done a
simulations of tantalite crystals and some other tetragonal trirutile type structure of some nanomaterials having magnetic properties. Their importance is given by their magnetic properties in the paramagnetic region. In this study the growth and equilibrium forms of tantalite crystals were studied using energies . These energies were assumed to be directly proportional to the growth rate for the flat faces.