Concomitant polymorphs of HgI2: red, orange and yellow crystals as obtained by evaporation from 2-chloroethanol. Their structures display different coordination of the mercury atoms. Red and orange crystals are obtained if the vessel is closed at ambient temperature; the three polymorphs are obtained together by evaporation of the solution at ambient conditions; and only yellow crystals are obtained if the solution is heated at 323 K or more. Provided by Marc Hostettler
