What's the plural form of pyrochlore? Here's the word you're looking for.
Answer
The noun pyrochlore can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be pyrochlore.
However, in more specific contexts, the plural form can also be pyrochlores e.g. in reference to various types of pyrochlores
or a collection of pyrochlores.