Autunite
Autunite (hydrated calcium uranyl phosphate), with formula Ca(UO2)2(PO4)2·10–12H2O, is a yellow-greenish fluorescent phosphate mineral with a hardness of 2–. Autunite crystallizes in the orthorhombic system and often occurs as tabular square crystals, commonly in small crusts or in fan-like masses. Due to the moderate uranium content of 48.27% it is radioactive and also used as uranium ore. Autunite fluoresces bright green to lime green under UV light. The mineral is also called calco-uranite, but this name is rarely used and effectively outdated.

Autunite was discovered in 1852 near Autun, France, which is also autunite's namesake. It occurs as an oxidation product of uranium minerals in granite pegmatites and hydrothermal deposits. Associate minerals include metaautunite, torbernite, phosphuranylite, saleeite, uranophane and sabugalite.
Q191807
fluorescent
Concept
Q3092395
phosphate
Concept
Q7946
mineral
Concept
Q41472
hardness
Concept
Q648961
orthorhombic
Concept
Q43533
crystal
Concept
Q1098
uranium
Concept
Q11448
radioactive
Concept
Q190827
Autun
LOC
Q142
France
LOC
Q82682
oxidation
Concept
Q41177
granite
Concept
Q105630
pegmatite
Concept
Q1036221
hydrothermal
UNK
None
metaautunite
UNK
Q409918
torbernite
Concept
Q3748977
phosphuranylite
Concept
Q411561
saleeite
Concept
Q423494
uranophane
Concept
None
sabugalite
UNK
Q407345
Autunite
Concept
Q407345
Autunite
Concept
Q407345
Autunite
Concept
Q407345
Autunite
Concept
1852-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1852
DATE
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+4^^http://www.w3.org/2001/XMLSchema#decimal
4
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+10^^http://www.w3.org/2001/XMLSchema#decimal
10
NUMBER
+12^^http://www.w3.org/2001/XMLSchema#decimal
12
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+48.27^^http://www.w3.org/2001/XMLSchema#decimal
48.27
NUMBER
crystal system
subclass of
country