Cerium based glass polishing compositions

摘要

Cerium based glass polishing compositions, well adapted for the polishing, e.g., of optical glass, are comprised of (i) at least one crystalline phase of CeO2 type, and (ii) a crystalline phase which comprises a rare earth pyrosilicate having the formula Ln2-xCexSi2O7, wherein Ln is at least one lanthanide or yttrium and x is a number ranging from zero to less than 2.