noun
- A bright yellow or green radioactive mineral consisting of hydrated calcium uranium phosphate, used as an ore of uranium.
Usage: mineralogy; technical
Examples
- Autunite crystals fluoresce under ultraviolet light.
- The geologist identified autunite in the rock sample by its characteristic yellow-green color.
- Autunite is an important secondary uranium mineral found in oxidized uranium deposits.
- Collectors prize autunite specimens for their striking fluorescence and crystal clarity.
- The presence of autunite in the ore indicated significant uranium content.