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|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
|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|
|Hardness (Mohs):||2 - 3|
Crystallography of Pseudo-autunite
|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 Å³ (Calculated from Unit Cell)|
Optical Data of Pseudo-autunite
|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.
|Dispersion:||r > v strong|
Chemical Properties of Pseudo-autunite
|Simplified for copy/paste:||(H3O)4Ca2(UO2)2(PO4)4·5H2O|
|Essential elements:||Ca, H, O, P, U|
|All elements listed in formula:||Ca, H, O, P, U|
Relationship of Pseudo-autunite to other Species
|Related Minerals - Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
|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
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
The 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. ? 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.
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New Locality Added: Buraco Mine, São Mamede de Ribatua, Alijó, Vila Real District, PortugalFrom Rui Nunes, 2nd Oct 2014 15:35:50