Autunite Group |
||
|---|---|---|
autunite |
novacekite |
torbernite |
fritzscheite |
sabugalite |
troegerite |
heinrichite |
saleeite |
uranocircite |
kahlerite |
sodium autunite |
uranospinite zeunerite |
Meta-autunite Group |
|
|---|---|
abernathyite |
metanovacekite |
bassetite |
metatorbernite |
meta-ankoleite |
meta-uranocircite |
meta-autunite |
meta-uranospinite |
metaheinrichite |
metazeunerite |
metakahlerite |
sodium uranospinite |
metakirchheimerite |
uramphite |
metalodevite |
|
The autunite structure is characterized by layers of (P,As,V)O4 tetrahedra and highly distorted UO6 octahedra with A ions and H2O molecules occupying cavities between the layers.
Minerals of the autunite and meta-autunite groups share the general structural formula
in the autunites,
- A :
-
= Ca,Na2,Ba,Mg,Fe2+,Cu,Mn
- X :
-
= P,As,V
- n :
-
= 8–12
and, in the meta-autunites,
- A :
-
= K 2,(NH4)2,Ca,Ba,Mg,Fe2+,Co,Cu,Zn
- X :
-
= P,As
- n :
-
= 4–8
The two groups differ in water content and in the polytypic stacking of the layers. The transition between the two groups occurs near or somewhat above room...
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References
Nininger, R. D., 1954. Minerals for Atomic Energy. New York: Van Nostrand, 32–34.
Phillips, W. R., and Griffin, D. T., 1981. Optical Mineralogy. San Francisco: Freeman, p. 424, 444, 448.
Cross-references
See mineral glossary.
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© 1981 Hutchinson Ross Publishing Company
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Frye, K. (1981). Autunite (torbernite) group, meta-autunite (metatorbernite) group. In: Mineralogy. Encyclopedia of Earth Science. Springer, Boston, MA. https://doi.org/10.1007/0-387-30720-6_14
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DOI: https://doi.org/10.1007/0-387-30720-6_14
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-87933-184-9
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