| abstract |
Chalcohalogenated glasses result from the association of the following chemical elements: antimony, lead, mercury, bromine, iodine and sulfur. The relative proportions of cations and anions, expressed in atomic percentage, obey the following rules: a) all the cations contain: from 0 to 100% antimony, from 0 to 100% lead, from 0 to 70% mercury, the sum of the percentages of antimony plus lead reaching at least 30% of all cations; b) all of the anions contain: from 10 to 95% sulfur, from 0 to 90% bromine, from 0 to 80% iodine, the sum of the percentages of bromine plus iodine being between 5 and 95% of the set of anions. |