Polymer crystals have unexpected properties in comparison to basic nuclear gems. They have high thickness and long range request. They don't have isotropy, and along these lines are anisotopic in nature, which implies they show anisotropy and constrained compliance space. Be that as it may, similarly as nuclear precious stones have cross sections, polymer gems likewise display an intermittent structure called a grid, which portrays the redundancy of the unit cells in the space. The two essential crystallographic methods utilized for contemplating polymer structure, Xâ€Âray fiber diffraction investigation and polymer electron crystallography, are portrayed in this section. Xâ€Âray fiber diffraction investigation is an assortment of crystallographic methods used to decide atomic and precious stone structures of particles, or sub-atomic gatherings, that structure examples (frequently strands) in which the particles, congregations or crystallites are roughly equal however not in any case requested.