Definition of pyrolusite in English:
A black or dark grey mineral with a metallic lustre, consisting of manganese dioxide.
- Scheele produced chlorine by treating the mineral pyrolusite with hydrochloric acid (HCl).
- The ore, a mixture of ‘psilomelane’ and pyrolusite with much manganiferous limonite, contains masses of cerussite.
- It never occurs as a free element, but only in ores such as pyrolusite, manganite, psilomelane, and rhodochrosite.
Definition of pyrolusite in:
- US English dictionary
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