Fermiite
Fermiite is a rare uranium-containing mineral with the chemical formula (Na,K)4(UO2)(SO4)3·3H2O. It is a secondary mineral, meaning it forms from the alteration of pre-existing uranium minerals. Fermiite is characterized by its bright yellow color and its occurrence as tiny, acicular (needle-like) crystals or crusts.
Fermiite is named in honor of Enrico Fermi, the renowned Italian-American physicist who played a significant role in the development of nuclear technology.
Fermiite typically occurs in arid or semi-arid environments associated with uranium deposits. It is often found alongside other secondary uranium minerals, such as gypsum, johannite, and zippeite.
Due to its uranium content, fermiite is radioactive. Handling specimens should be done with care, following appropriate safety guidelines to minimize radiation exposure. The mineral's radioactivity is a key characteristic that aids in its identification.
Fermiite is relatively rare and not of significant economic importance as an ore of uranium. Its main significance lies in its scientific value as an indicator mineral within uranium ore deposits and in its contribution to the understanding of uranium geochemistry.