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Arsenuranospathite

A valid IMA mineral species - grandfathered
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00304940017271921113713.jpg
Arsenuranospathite, etc.

Uranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany
04927130017271921145211.jpg
Arsenuranospathite

Krunkelbach Valley Uranium deposit, Menzenschwand, St Blasien, Waldshut, Freiburg Region, Baden-Württemberg, Germany
08224030017271921161604.jpg
Arsenuranospathite

Bricco Volti - Monte Ortieul quarrying area, Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy
06339260017866506689063.jpg
Arsenuranospathite, etc.

Uranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany
07171310017866627174380.jpg
Arsenuranospathite

Krunkelbach Valley Uranium deposit, Menzenschwand, St Blasien, Waldshut, Freiburg Region, Baden-Württemberg, Germany
08224030017271921161604.jpg
Arsenuranospathite

Bricco Volti - Monte Ortieul quarrying area, Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy
00304940017271921113713.jpg
Arsenuranospathite, etc.

Uranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany
04927130017271921145211.jpg
Arsenuranospathite

Krunkelbach Valley Uranium deposit, Menzenschwand, St Blasien, Waldshut, Freiburg Region, Baden-Württemberg, Germany
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About ArsenuranospathiteHide

Formula:
Al(UO2)2(AsO4)2F · 20H2O
Colour:
Pale yellow
Hardness:
2
Crystal System:
Orthorhombic
Name:
Named in allusion to its composition as the ARSENate analog of uranospathite.
Isostructural with:
Uranospathite
Partially dehydrates readily in air (Walenta, 1978) to form Unnamed (Partially dehydrated Arsenuranospathite), which contains only 10 water molecules per formula unit.

Chemically related to chistyakovaite.

Crystal structure details:

- corner-sharing UO6 square bipyramids
- (As,P)O4 tetrahedra
- the above form autunite-type [(UO2)((As,P)O4)] sheet
- Al(H2O)6 octahedra are in the interlayer space
- 8 isolated water molecules in the interlayer
- hydrogen bonds link together the water molecules, Al octahedra and UAs-bearing sheets, forming a very complex bonding net
- F likely replaces some of the water molecules of the Al-bearing octahedra.


Unique IdentifiersHide

Mindat ID:
373
Long-form identifier:
mindat:1:1:373:9

IMA Classification of ArsenuranospathiteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Al(U6+O2)2(As5+O4)2F·20H2O

Classification of ArsenuranospathiteHide

Strunz-mindat (2026):
8.EB.25

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
Dana 8th ed.:
40.2a.23.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
Hey's CIM Ref.:
20.7.14

20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates of U

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
AushIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ArsenuranospathiteHide

Colour:
Pale yellow
Hardness:
2 on Mohs scale

Optical Data of ArsenuranospathiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.542 nε = 1.538
Max. Birefringence:
δ = 0.004
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
None to Very Low
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic (convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis centred and vertical. The coloured rings are isochromatics, computed with the same physics as the Michel-Lévy bar above; the dark cross is the isogyre.

For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.

Chemistry of ArsenuranospathiteHide

Mindat Formula:
Al(UO2)2(AsO4)2F · 20H2O
Element Weights:
Element% weight
O41.822 %
U38.888 %
As12.240 %
H3.293 %
Al2.204 %
F1.552 %

Calculated from ideal end-member formula.
O
U
As
H
Al
F
Elements listed:
Al, As, F, H, O, U - search for minerals with similar chemistry
Common Impurities:
P

Crystallography of ArsenuranospathiteHide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pnn2
Cell Parameters:
a = 29.9262(7) Å, b = 7.1323(1) Å, c = 7.1864(1) Å
Ratio:
a:b:c = 4.196 : 1 : 1.008
Unit Cell V:
1533.9 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
14.62 Å(100)
7.62 Å(100)
3.49 Å(90)
5.03 Å(80)
3.59 Å(50)
3.24 Å(40)
2.25 Å(30)
Comments:
Menzenschwand material

Geological EnvironmentHide

Type Occurrence of ArsenuranospathiteHide

Other Language Names for ArsenuranospathiteHide

Common AssociatesHide

Associations Based on Photo Data:
8 photos of Arsenuranospathite associated with WulfenitePb(MoO4)
4 photos of Arsenuranospathite associated with Schoepite(UO2)8O2(OH)12 · 12H2O
2 photos of Arsenuranospathite associated with Umohoite(UO2)MoO4 · 2H2O
2 photos of Arsenuranospathite associated with MetazeuneriteCu(UO2)2(AsO4)2 · 8H2O
2 photos of Arsenuranospathite associated with ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
1 photo of Arsenuranospathite associated with UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
1 photo of Arsenuranospathite associated with MetatorberniteCu(UO2)2(PO4)2 · 8H2O
1 photo of Arsenuranospathite associated with IanthiniteU4+(UO2)5O7 · 10H2O
1 photo of Arsenuranospathite associated with TorberniteCu(UO2)2(PO4)2 · 12H2O
1 photo of Arsenuranospathite associated with Studtite[(UO2)(O2)(H2O)2] · H2O

Related Minerals - Strunz-mindat GroupingHide

8.EB.Meta-autunite GroupA1-2(UO2)2(TO4)2 · 5-10H2O
8.EB.05RauchiteNi(UO2)2(AsO4)2 · 10H2OTric. 1 : P1
8.EB.05UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
8.EB.05UranospiniteCa(UO2)2(AsO4)2 · 10H2OTet. 4/mmm(4/m2/m2/m) : P4/nmm
8.EB.05ZeuneriteCu(UO2)2(AsO4)2 · 12H2OTet. 4/mmm(4/m2/m2/m) : I4/mmm
8.EB.05MetarauchiteNi(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.05HeinrichiteBa(UO2)2(AsO4)2 · 10H2OMon. 2/m : P2/b
8.EB.05KahleriteFe2+(UO2)2(AsO4)2 · 12H2OTet. 4/m : P42/n
8.EB.05HydronováčekiteMg(UO2)2(AsO4)2 · 12H2OTric. 1 : P1
8.EB.05TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm(4/m2/m2/m) : I4/mmm
8.EB.05NováčekiteMg(UO2)2(AsO4)2 · 10H2OMon. 2/m
8.EB.05AutuniteCa(UO2)2(PO4)2 · 10-12H2OOrth. mmm(2/m2/m2/m) : Pnma
8.EB.05SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m
8.EB.05Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2OTet.
8.EB.10BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
8.EB.10LehneriteMn2+(UO2)2(PO4)2 · 8H2OMon. 2/m
8.EB.10Meta-autuniteCa(UO2)2(PO4)2 · 6H2OTet. 4/mmm(4/m2/m2/m)
8.EB.10MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
8.EB.10MetauranocirciteBa(UO2)2(PO4)2 · 7H2OMon. 2 : P21
8.EB.10MetauranospiniteCa(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
8.EB.10MetaheinrichiteBa(UO2)2(AsO4)2 · 8H2OMon. 2 : P21
8.EB.10MetakahleriteFe2+(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.10MetakirchheimeriteCo(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.10MetanováčekiteMg(UO2)2(AsO4)2 · 8H2OTet. 4/m : P4/n
8.EB.10MetanatroautuniteNa(UO2)(PO4)(H2O)3Tet. 4/mmm(4/m2/m2/m) : P4/ncc
8.EB.10MetatorberniteCu(UO2)2(PO4)2 · 8H2OTet. 4/m : P4/n
8.EB.10MetazeuneriteCu(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
8.EB.10PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2OTet.
8.EB.10'Pseudo-autunite'(H3O)4Ca2(UO2)2(PO4)4 · 5H2OOrth.
8.EB.15AbernathyiteK(UO2)(AsO4) · 3H2OTet. 4/mmm(4/m2/m2/m) : P4/ncc
8.EB.15Uramphite(NH4)2(UO2)2(PO4)2 · 6H2OTet. 4/mmm(4/m2/m2/m) : P4/nmm
8.EB.15Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2OTet. 4/mmm(4/m2/m2/m) : P4/nmm
8.EB.15NatrouranospiniteNa2(UO2)2(AsO4)2 · 5H2OTet. 4/mmm(4/m2/m2/m) : P4/nmm
8.EB.15Trögerite(H3O)(UO2)(AsO4) · 3H2OTet. 4/mmm(4/m2/m2/m) : P4/nmm
8.EB.15Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2OTet. 4/mmm(4/m2/m2/m) : P4/nmm
8.EB.15Uramarsite(NH4)(UO2)(AsO4) · 3H2OTet. 4/mmm(4/m2/m2/m) : P4/mmm
8.EB.20ChistyakovaiteAl(UO2)2(AsO4)2(F,OH) · 6.5H2OMon.
8.EB.20ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2OMon.
8.EB.25Uranospathite(Al,◻)(UO2)2(PO4)2F · 20(H2O,F)Orth. mm2 : Pnn2
8.EB.30Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2OMon.
8.EB.35CoconinoiteFe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2OMon.
8.EB.40RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2OMon. 2/m : B2/b
8.EB.45TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2OTric.
8.EB.50FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2OTric. 1 : P1
8.EB.55ArsenosabugaliteH0.5Al0.5(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.55SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m
8.EB.60Horákite(Bi7O7OH)[(UO2)4(PO4)2(AsO4)2(OH)2] · 3.5H2OMon. 2/m : B2/b

RadioactivityHide

Other InformationHide

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

Internet Links for ArsenuranospathiteHide

References for ArsenuranospathiteHide

Localities for ArsenuranospathiteHide

Showing 20 localities.

This 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.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Karlovy Vary Region
    • Karlovy Vary District
Hloušek et al. (2002)
France
 
  • Bourgogne-Franche-Comté
    • Nièvre
      • Château-Chinon
        • Arleuf
Boisson J.-M. et al. (2023)
  • Nouvelle-Aquitaine
    • Haute-Vienne
      • Bellac
        • Razès
- (1998)
      • Limoges
        • Saint-Sylvestre
- (1998)
  • Occitanie
    • Hérault
      • Lodève
        • Le Puech
Bariand et al. (1993) +3 other references
Germany
 
  • Baden-Württemberg
    • Freiburg Region
      • Breisgau-Hochschwarzwald
        • Bollschweil
          • St Ulrich
Walenta (1996)
      • Ortenaukreis
        • Haslach im Kinzigtal
          • Haslach im Kinzigtal
Blaß et al. (2000)
      • Rottweil
        • Schenkenzell
Unnamed (Partially dehydrated Arsenuranospathite)
            • Böckelsbach valley
Walenta (1992)
            • Burgfelsen
            • Heubach Valley
      • Waldshut
        • St Blasien
          • Menzenschwand
Walenta (1992)
  • Rhineland-Palatinate
    • Birkenfeld
      • Birkenfeld
        • Ellweiler
Aufschluss 69/ (7+8) +1 other reference
  • Saxony
    • Erzgebirgskreis
      • Annaberg-Buchholz
        • Kleinrückerswalde
Desor (05/2020)
Italy
 
  • Piedmont
    • Cuneo Province
      • Bagnolo Piemonte
Marello et al. (2018)
Marello et al. (2018)
Kazakhstan
 
  • Jetisu Region
    • Alakol District
Pavel M. Kartashov (n.d.)
Slovakia
 
  • Košice Region
    • Gelnica District
      • Prakovce
Ondrejka et al. (2024)
Switzerland
 
  • Valais
    • Saint-Maurice
      • Salvan
        • Les Marécottes
          • La Creusaz
USA
 
  • Utah
    • San Juan County
      • Red Canyon Mining District
Kampf et al. (2018)
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