What's the plural form of pyrrhotine? Here's the word you're looking for.
Answer
The noun pyrrhotine can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be pyrrhotine.
However, in more specific contexts, the plural form can also be pyrrhotines e.g. in reference to various types of pyrrhotines
or a collection of pyrrhotines.
Examples
These are characterized by pyrrhotine and pyrite poorly d with low quantities of chalcopyrite.
