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Pseudo-autunite

Formula:
(H
 
3
O)
 
4
Ca
 
2
(UO
 
2
)
 
2
[PO
 
4
]
 
4
 · 5H
 
2
O (?)
System:OrthorhombicColour: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

IMA status:Discredited
Strunz 8th edition ID: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
Dana 8th edition ID:40.2a.1.3

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
Hey's CIM Ref.: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°
Maximum Birefringence:δ = 0.029

Chart 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:
(H
 
3
O)
 
4
Ca
 
2
(UO
 
2
)
 
2
[PO
 
4
]
 
4
 · 5H
 
2
O (?)
Essential elements:Ca, F, H, O, P, U
All elements listed in formula:Ca, H, O, P, U

Relationship of Pseudo-autunite to other Species

Related to:
  • Meta-autunite Group
    • Related Minerals - Strunz Grouping):
    7/E.02-10Metanováčekite
    Mg(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 4-8H
     
    2
    		O
    7/E.02-20Bassetite
    Fe
    2+
     
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    7/E.02-30Metakahlerite
    Fe
    2+
     
    		(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    7/E.02-40Lehnerite
    Mn
    2+
     
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    7/E.02-50Metakirchheimerite
    Co(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    7/E.02-60Metatorbernite
    Cu(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    7/E.02-70Metazeunerite
    Cu(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    7/E.02-80Metalodèvite
    Zn(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 10H
     
    2
    		O
    7/E.02-90Meta-autunite
    Ca(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		· 6-8H
     
    2
    		O
    7/E.02-100Metauranospinite
    Ca(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    7/E.02-110Metauranocircite
    Ba(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 7H
     
    2
    		O
    7/E.02-120Metaheinrichite
    Ba(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    7/E.02-125Sodium Meta-autunite
    Na
     
    2
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 6-8H
     
    2
    		O
    7/E.02-130Natrouranospinite
    (Na
     
    2
    		,Ca)(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 5H
     
    2
    		O
    7/E.02-140Meta-ankoleite
    K
     
    2
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 6H
     
    2
    		O
    7/E.02-150Abernathyite
    K
     
    2
    		(UO
     
    2
    		)
     
    2
    		[AsO
     
    4
    		]
     
    2
    		 · 6H
     
    2
    		O
    7/E.02-160Uramphite
    (NH
     
    4
    		)
     
    2
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 6H
     
    2
    		O
    7/E.02-165Uramarsite
    (NH
     
    4
    		,H
     
    3
    		O)
     
    2
    		(UO
     
    2
    		)
     
    2
    		[(AsO
     
    4
    		,PO
     
    4
    		)]
     
    2
    		 · 6H
     
    2
    		O
    7/E.02-170Chernikovite
    (H
     
    3
    		O)
     
    2
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 6H
     
    2
    		O
    7/E.02-190Ulrichite
    CaCu(UO
     
    2
    		)[PO
     
    4
    		]
     
    2
    		 · 4H
     
    2
    		O
    Related Minerals - Hey's Index Grouping:
    19.11.1Lermontovite
    UPO
     
    4
    		·OH·H
     
    2
    		O
    19.11.2Metavanmeersscheite
    U
    4+
     
    		(UO
     
    2
    		)
     
    3
    		[(OH)
     
    2
    		|PO
     
    4
    		]
     
    2
    		 · 2H
     
    2
    		O
    19.11.3Vanmeersscheite
    U
    4+
     
    		(UO
     
    2
    		)
     
    3
    		[(OH)
     
    2
    		|PO
     
    4
    		]
     
    2
    		 · 4H
     
    2
    		O
    19.11.4Chernikovite
    (H
     
    3
    		O)
     
    2
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 6H
     
    2
    		O
    19.11.5Vyacheslavite
    UPO
     
    4
    		(OH)·nH
     
    2
    		O
    19.11.6Metanatroautunite
    NaUO
     
    2
    		PO
     
    4
    		·4H
     
    2
    		O
    19.11.7Yingjiangite
    (K,Ca)(UO
     
    2
    		)
     
    3
    		[OH|(H
     
    2
    		O,OH)|(PO
     
    4
    		)
     
    2
    		] · 3H
     
    2
    		O
    19.11.8Meta-ankoleite
    K
     
    2
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 6H
     
    2
    		O
    19.11.9Uramphite
    (NH
     
    4
    		)
     
    2
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 6H
     
    2
    		O
    19.11.10Torbernite
    Cu(UO
     
    2
    		)
     
    2
    		(PO
     
    4
    		)
     
    2
    		·12H
     
    2
    		O
    19.11.11Metatorbernite
    Cu(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    19.11.12Saléeite
    Mg(UO
     
    2
    		)
     
    2
    		(PO
     
    4
    		)
     
    2
    		·10H
     
    2
    		O
    19.11.13Ningyoite
    CaU(PO
     
    4
    		)
     
    2
    		·1-2H
     
    2
    		O
    19.11.14Meta-autunite
    Ca(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		· 6-8H
     
    2
    		O
    19.11.15Autunite
    Ca(UO
     
    2
    		)
     
    2
    		(PO
     
    4
    		)
     
    2
    		·11H
     
    2
    		O
    19.11.17Phurcalite
    Ca
     
    2
    		(UO
     
    2
    		)
     
    3
    		[O|PO
     
    4
    		]
     
    2
    		 · 7H
     
    2
    		O
    19.11.18Phosphuranylite
    (H
     
    3
    		O)
     
    3
    		KCa(UO
     
    2
    		)
     
    7
    		[O|PO
     
    4
    		]
     
    4
    		 · 8H
     
    2
    		O
    19.11.19Ulrichite
    CaCu(UO
     
    2
    		)[PO
     
    4
    		]
     
    2
    		 · 4H
     
    2
    		O
    19.11.20Bergenite
    Ca
     
    2
    		Ba
     
    4
    		[(UO
     
    2
    		)
     
    3
    		O
     
    2
    		(PO
     
    4
    		)
     
    2
    		]
     
    3
    		·16H
     
    2
    		O
    19.11.21Metauranocircite
    Ba(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 7H
     
    2
    		O
    19.11.22Uranocircite
    Ba(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 10H
     
    2
    		O
    19.11.23Ranunculite
    HAlUO
     
    2
    		PO
     
    4
    		(OH)
     
    3
    		·4H
     
    2
    		O
    19.11.24Triangulite
    Al
     
    3
    		(UO
     
    2
    		)
     
    4
    		(PO
     
    4
    		)
     
    4
    		(OH)
     
    5
    		·5H
     
    2
    		O
    19.11.25Mundite
    Al(UO
     
    2
    		)
     
    3
    		[(OH)
     
    3
    		|(PO
     
    4
    		)
     
    2
    		] · 5.5H
     
    2
    		O
    19.11.26Upalite
    Al(UO
     
    2
    		)
     
    3
    		(PO
     
    4
    		)
     
    2
    		O(OH)·7H
     
    2
    		O
    19.11.27Furongite
    Al
     
    13
    		(UO
     
    2
    		)
     
    7
    		(PO
     
    4
    		)
     
    13
    		(OH)
     
    14
    		 · 58H
     
    2
    		O
    19.11.28Threadgoldite
    Al(UO
     
    2
    		)
     
    2
    		[OH|(PO
     
    4
    		)
     
    2
    		] · 8H
     
    2
    		O
    19.11.29Phuralumite
    Al
     
    2
    		(UO
     
    2
    		)
     
    3
    		[(OH)
     
    2
    		|(PO
     
    4
    		)
     
    3
    		] · 13H
     
    2
    		O
    19.11.30Moreauite
    Al
     
    3
    		UO
     
    2
    		(PO
     
    4
    		)
     
    3
    		(OH)
     
    2
    		·13H
     
    2
    		O
    19.11.31Sabugalite
    HAl(UO
     
    2
    		)
     
    4
    		(PO
     
    4
    		)
     
    4
    		·16H
     
    2
    		O
    19.11.32Uranospathite
    HAl(UO
     
    2
    		)
     
    4
    		(PO
     
    4
    		)
     
    4
    		·40H
     
    2
    		O
    19.11.33Althupite
    AlTh(UO
     
    2
    		)
     
    7
    		[O
     
    2
    		|(OH)
     
    5
    		|(PO
     
    4
    		)
     
    4
    		] · 15H
     
    2
    		O
    19.11.34Françoisite-(Nd)
    (Nd,Ce,Sm)(UO
     
    2
    		)
     
    3
    		[O|OH|(PO
     
    4
    		)
     
    2
    		] · 6H
     
    2
    		O
    19.11.35Kivuite
    H
     
    2
    		Th(UO
     
    2
    		)
     
    3
    		[O|OH|(PO
     
    4
    		)
     
    2
    		] · 6H
     
    2
    		O (?)
    19.11.36Parsonsite
    Pb
     
    2
    		(UO
     
    2
    		)[PO
     
    4
    		]
     
    2
    		 · 2H
     
    2
    		O
    19.11.37Dewindtite
    Pb(UO
     
    2
    		)
     
    3
    		[OH|PO
     
    4
    		]
     
    2
    		 · 3H
     
    2
    		O
    19.11.38Dumontite
    Pb
     
    2
    		(UO
     
    2
    		)
     
    3
    		[(OH)
     
    2
    		|PO
     
    4
    		]
     
    2
    		 · 3H
     
    2
    		O
    19.11.39Przhevalskite
    Pb
     
    2
    		(UO
     
    2
    		)
     
    3
    		[(OH)
     
    2
    		|PO
     
    4
    		]
     
    2
    		 · 3H
     
    2
    		O
    19.11.40Lehnerite
    Mn
    2+
     
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    19.11.41Bassetite
    Fe
    2+
     
    		(UO
     
    2
    		)
     
    2
    		[PO
     
    4
    		]
     
    2
    		 · 8H
     
    2
    		O
    19.11.42Vochtenite
    (Fe
    2+
     
    		,Mg)Fe
    3+
     
    		(UO
     
    2
    		)
     
    4
    		[OH|(PO
     
    4
    		)
     
    4
    		] · 12-13H
     
    2
    		O

    Other Information

    Health Warning: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

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    Localities for Pseudo-autunite

    (TL) indicates type locality. ? 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'
    		No reference listed
    Mineral and/or Locality
    Google
     
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