Uranophane is a rare mineral that belongs to the group of uranium-bearing minerals. Its chemical formula is Ca(UO2)2Si2O7·6-8H2O. Uranophane forms yellow to greenish-yellow crystals and is often found in association with other uranium minerals. The word "uranophane" can be used interchangeably with the terms "uranocircite," "uranothorite," "uranomolybdite," "uranophosphite," and "uranpyrochlore." These words are synonyms that refer to various uranium minerals that are found together in geological deposits. The term uranophane has origins from the Greek word, "ouranos," which means sky or heaven. The term uranophane is often used by geologists to describe uranium-rich deposits in igneous and metamorphic rocks.