Find the word definition

Wiktionary
agrinierite

n. (context mineral English) A mineral often found in the oxidation zone of uranium deposits.

Wikipedia
Agrinierite

Agrinierite ( K( Ca, Sr)( U O)O(O H)·5HO) is a mineral often found in the oxidation zone of uranium deposits. It is named for Henry Agrinier (1928–1971), an engineer for the Commissariat à l'Énergie Atomique.