Liquid sulfur has the unusual characteristic that the viscosity increases with increasing temperature,
going through a maximum at about 170 to 180°C. At higher temperature, the viscosity decreases as the
temperature is increased. When S 8 molecules rupture, the long chains interact to give larger aggregates
that do not fl ow as readily as do the molecules having a ring structure. At higher temperatures, the
chains dissociate and the viscosity becomes lower. Selenium does not exhibit this unusual behavior in
viscosity.