What does it look like?
What is it?
Autunite is a secondary uranium ore mineral, in that it has altered from the primary ore uraninite that we featured yesterday. Though much of the uranium in the earth is in the mineral form of uraniute, it does alter over geological time to more complicated minerals like autunite.
Discovered in France in 1852, it is a green mineral that contains calcium and phosphorus as well as lots of water. It is also fluorescent, like Andersonite, which we have blogged about already. As Autentite is a hydrated mineral, so simply drying it out increases the proportion of uranium it contains.
Where did the structure come from?