psilomelane.
/sahy-lom-uh-leyn/US // saɪˈlɒm əˌleɪn //UK // (sɪˈlɒmɪˌleɪn) //
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Definitions
n.noun · 名词
- 1.
- ›a common mineral consisting of a mixture of pyrolusite and other oxides of manganese, usually found in black, rounded masses: an ore of manganese.
Examples
Manganese occurs mainly as black oxide (MnO2) in the mineral pyrolusite; and, in a less pure form, in psilomelane and wad.
As an ore of manganese it is much less abundant than pyrolusite or psilomelane.
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