Order–Disorder Transformations in Graphite Nitrates

  title={Order–Disorder Transformations in Graphite Nitrates},
  author={A. R. UBBELOHDE and G. S. PARRY and D. NIXON},
GRAPHITE nitrates, in which the layers are intercalated in first, second and third sequences, all show an anomaly in thermal expansion around − 20° C, attributed to a lambda transformation from form I to form II on cooling these solids1. Structural investigations by X-ray methods have now confirmed that order–disorder transformations occur in each of these crystal compounds. Moreover, some of the findings indicate that this thermal transformation exhibits several unusual features. It has been… CONTINUE READING