from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of oxysulphide.
Sorry, no etymologies found.
The usual explanation is that with sulphury ores compounds of metallic oxides and sulphides (oxysulphides) are formed, which remain in the slag, retaining considerable quantities of the precious metal.
An excess of lead and a high temperature prevents the formation of these oxysulphides.