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Pseudo-autunite

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Formula:
(H3O)4Ca2(UO2)2(PO4)4 · 5H2O
System:
Orthorhombic
Colour:
pale yellow, white
Hardness:
2 - 3
Fleischer noted that there is no evidence that alkalis or ammonium were looked for, and the hydronium formulation is therefore not proved.

Originally reported from North Karelia, Murmanskaja Oblast', Northern Region, Russia.

Classification of Pseudo-autunite

Discredited
7/E.02-180

7 : Phosphates, Arsenates, Vanadates
E : Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-
02 : Meta-autunite group
40.2a.1.3

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
19.11.16

19 : Phosphates
11 : Phosphates of U
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Physical Properties of Pseudo-autunite

Colour:
pale yellow, white
Streak:
white
Hardness (Mohs):
2 - 3
Cleavage:
Perfect

Crystallography of Pseudo-autunite

Crystal System:
Orthorhombic
Cell Parameters:
a = 6.94Å, b = 6.94Å, c = 12.85Å
Ratio:
a:b:c = 1 : 1 : 1.852
Unit Cell Volume:
V 618.90 ų (Calculated from Unit Cell)

Optical Data of Pseudo-autunite

Type:
Biaxial (-)
RI values:
nα = 1.541 nβ = 1.568 nγ = 1.570
2V:
Measured: 32° , Calculated: 30°
Max Birefringence:
δ = 0.029
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r > v strong

Chemical Properties of Pseudo-autunite

Formula:
(H3O)4Ca2(UO2)2(PO4)4 · 5H2O
Essential elements:
All elements listed in formula:

Relationship of Pseudo-autunite to other Species

7/E.02-10MetanováčekiteMg(UO2)2(AsO4)2 · 4-8H2O
7/E.02-20BassetiteFe2+(UO2)2(PO4)2 · 8H2O
7/E.02-30MetakahleriteFe2+(UO2)2(AsO4)2 · 8H2O
7/E.02-40LehneriteMn2+(UO2)2(PO4)2 · 8H2O
7/E.02-50MetakirchheimeriteCo(UO2)2(AsO4)2 · 8H2O
7/E.02-60MetatorberniteCu(UO2)2(PO4)2 · 8H2O
7/E.02-70MetazeuneriteCu(UO2)2(AsO4)2 · 8H2O
7/E.02-80MetalodèviteZn(UO2)2(AsO4)2 · 10H2O
7/E.02-90Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
7/E.02-100MetauranospiniteCa(UO2)2(AsO4)2 · 8H2O
7/E.02-110Metauranocircite-IBa(UO2)2(PO4)2 · 7H2O
7/E.02-120MetaheinrichiteBa(UO2)2(AsO4)2 · 8H2O
7/E.02-130Natrouranospinite(Na2,Ca)(UO2)2(AsO4)2 · 5H2O
7/E.02-140Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
7/E.02-150AbernathyiteK2(UO2)2(AsO4)2 · 6H2O
7/E.02-160Uramphite(NH4)2(UO2)2(PO4)2 · 6H2O
7/E.02-165Uramarsite(NH4,H3O)2(UO2)2(AsO4,PO4)2 · 6H2O
7/E.02-170Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2O
7/E.02-190UlrichiteCaCu(UO2)(PO4)2 · 4H2O
19.11.1LermontoviteU(PO4)(OH) · H2O
19.11.2MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2O
19.11.3VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2O
19.11.4Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2O
19.11.5VyacheslaviteU(PO4)(OH) · nH2O
19.11.6MetanatroautuniteNa(UO2)(PO4)(H2O)3
19.11.7YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2O
19.11.8Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
19.11.9Uramphite(NH4)2(UO2)2(PO4)2 · 6H2O
19.11.10TorberniteCu(UO2)2(PO4)2 · 12H2O
19.11.11MetatorberniteCu(UO2)2(PO4)2 · 8H2O
19.11.12SaléeiteMg(UO2)2(PO4)2 · 10H2O
19.11.13NingyoiteCaU(PO4)2 · 1-2H2O
19.11.14Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
19.11.15AutuniteCa(UO2)2(PO4)2 · 11H2O
19.11.17PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2O
19.11.18Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
19.11.19UlrichiteCaCu(UO2)(PO4)2 · 4H2O
19.11.20BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2O
19.11.21Metauranocircite-IBa(UO2)2(PO4)2 · 7H2O
19.11.22UranocirciteBa(UO2)2(PO4)2 · 10H2O
19.11.23RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2O
19.11.24TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2O
19.11.25MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2O
19.11.26UpaliteAl(UO2)3(PO4)2O(OH) · 7H2O
19.11.27FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2O
19.11.28ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2O
19.11.29PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2O
19.11.30MoreauiteAl3(UO2)(PO4)3(OH)2 · 13H2O
19.11.31SabugaliteHAl(UO2)4(PO4)4 · 16H2O
19.11.32Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)
19.11.33AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2O
19.11.34Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O
19.11.35Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
19.11.36ParsonsitePb2(UO2)(PO4)2 · 2H2O
19.11.37DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
19.11.38DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2O
19.11.39PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2O
19.11.40LehneriteMn2+(UO2)2(PO4)2 · 8H2O
19.11.41BassetiteFe2+(UO2)2(PO4)2 · 8H2O
19.11.42Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Pseudo-autunite

Reference List:
American Mineralogist (1965): 50: 1505.

Mineralogiya I Geokhimiya (Mineralogy and Geochemistry), Leningrad University, Sbornik statey: 1: 31-39.

Internet Links for Pseudo-autunite

Localities for Pseudo-autunite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Northern Karelia
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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