Structure of disordered forms of selenium close to the melting point - art. no. 014205

Large structural models of liquid and amorphous selenium have been construc ted that are consistent with the most up to date diffraction results obtain ed for these materials. It is found that close to the melting point liquid Se may already form only very short (up to N-max = 8) chains, whereas for t he amorphous form diffraction data are consistent with the presence of esse ntially infinite chains. Some aspects of the interpretation of liquid and a morphous solid diffraction data in general are also discussed.