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P.33
depending on the number of water molecules involved. Table P.2.5 lists all the members of
the autunite family. The variation of water is common to the group but does not seem to
affect the stability of the species.
2+
Autunites are known to form compounds with Ca, Mg, Ba, Na, Cu, Fe2 , K, Zn, Mn, Co, Pb,
NH4 Al, and H20. Many synthetic analogs can also be easily formed including Sr and even Li.
The included cation is easily exchangeable in acid solutions but the autunite structure
remains unaffected by the many substitutions.
TABLE P.2.5. The Autunite Family
Autunites, R 1-2(U0 2 ) 2 (XO 4) 2.8-12H 20
Autunite, Ca(UO 2 ) 2 (P0 4) 2 8-12H 20
Fritschelite Mn V
Heinrichite Ba As
Kahlerite Fe As
Novacekite Mg As
Sabugalite H,A1 P
Saleeite Mg P
Sodium autunite Na,Ca P
Torbernite Cu P
Uranocircite Ba P
Uranospinite Ca As
Zeunerite Cu As
Meta-autinites, R1_2(U0 2) 2(RO 4) 2.6-8H 20
Abernathylite
Bassettite
K2(U02) 2 (As04) 2.6-8H 20
2+
Fe2 P
Meta-ankoleite K2 P
Meta-autunite I Ca P
Metaheinrichite Ba As
Metakahlerite Fe 2+
As
Metakirchleimerite Co As
Metalodevite Zn As
Metanovacekite Mg As
Metaforbernite Cu P
Meta-uranocircite Ba P
Meta-uranospinite Ca As
Metazeuerite Cu As
Sodium uranospinite NaCa As
Troegerite (H 30) 2(UO 2) 2 (AsO 4 ) 2.6H 20
Uramphite NH 4 P
unnamed (H 30) 2 P
Meta-autunite II Ca(U0 2 ) 2 (PO 4 ) 2.4-6H 20