Crystal structure of isotactic polystyrene

  title={Crystal structure of isotactic polystyrene},
  author={Giulio Natta and Paolo Corradini and Ivaro W. Bassi},
  journal={Il Nuovo Cimento (1955-1965)},
ABSTRACT The crystal structure of isotactic polystyrene is described in this paper. The unit cell as determined from the X-ray diffraction spectra of oriented samples is rhombohedral, and its constants referred to hexagonal axes are: a = 21.9 ± 0.1 A , c = 6.65 ± 0.05 A ( chain axis ) Z = 18 ; Space group R 3 c or R 3 ¯ c . 
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