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Ferrivauxite

A valid IMA mineral species
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07382260017271994542343.jpg
Ferrivauxite

Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
05410450017271994567638.jpg
Ferrivauxite, etc.

Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
06549010017272472428734.jpg
Ferrivauxite, etc.

Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
09933900017272472443684.jpg
Ferrivauxite

Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
08839160017272472455483.jpg
Ferrivauxite, etc.

Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
06549010017272472428734.jpg
Ferrivauxite, etc.

Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
07382260017271994542343.jpg
Ferrivauxite

Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
05410450017271994567638.jpg
Ferrivauxite, etc.

Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
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About FerrivauxiteHide

Formula:
Fe3+Al2(PO4)2(OH)3 · 5H2O
Colour:
Golden brown
Lustre:
Vitreous
Hardness:
3½
Specific Gravity:
2.39 (Calculated)
Crystal System:
Triclinic
Name:
After vauxite and the ferric content of the mineral.
An oxidized equivalent of vauxite. Also the lower hydrate equivalent of sigloite (the heptahydrate). Forms oxidation pseudomorphs after vauxite. Chemically similar to yet another Fe3+-Al phosphate, cacoxenite.


Unique IdentifiersHide

Mindat ID:
45990
Long-form identifier:
mindat:1:1:45990:1

Similar NamesHide

FerriphoxiteA valid IMA mineral species[(NH4)2K(H2O)][Fe3+(HPO4)2(C2O4)]

IMA Classification of FerrivauxiteHide

IMA status:
Approved
IMA Formula:
Fe3+Al2(PO4)2(OH)3·5H2O
Approval year:
2014

Classification of FerrivauxiteHide

Strunz-mindat (2026):
8.DC.

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1

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

Physical Properties of FerrivauxiteHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Colour:
Golden brown
Streak:
Pale yellow-brown
Hardness:
3½ on Mohs scale
Comment:
Estimated to be ∼3½ by comparison with vauxite
Tenacity:
Brittle
Cleavage:
None Observed
Shows no cleavage.
Fracture:
Irregular/Uneven
Density:
2.39 g/cm3 (Calculated)

Optical Data of FerrivauxiteHide

Type:
Biaxial (-)
RI values:
nα = 1.589(1) nβ =  1.593(1) nγ = 1.596(1)
Max. Birefringence:
δ = 0.007
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:
Moderate

Chemistry of FerrivauxiteHide

Mindat Formula:
Fe3+Al2(PO4)2(OH)3 · 5H2O
Element Weights:
Element% weight
O58.068 %
P14.052 %
Fe12.668 %
Al12.241 %
H2.972 %

Calculated from ideal end-member formula.
Elements listed:
Al, Fe, H, O, P - search for minerals with similar chemistry

Crystallography of FerrivauxiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 9.198(2) Å, b = 11.607(3) Å, c = 6.112(2) Å
α = 98.237(9)°, β = 91.90(1)°, γ = 108.658(9)°
Ratio:
a:b:c = 0.792 : 1 : 0.527
Unit Cell V:
609.68 ų (Calculated from Unit Cell)
Z:
2
Twinning:
Occurs on {010}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.834 Å(100)
8.682 Å(24)
8.242 Å(65)
6.018 Å(28)
5.918 Å(23)
5.491 Å(29)
4.338 Å(26)
2.898 Å(32)
Locality:
Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
Comments:
From Type Description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47c : [Carbonates, phosphates, borates, nitrates]

Type Occurrence of FerrivauxiteHide

Type Locality:
ⓘ Siglo Veinte Mine, Llallagua, Rafael Bustillo Province, Potosí, Bolivia
General Appearance of Type Material:
As oxidation pseudomorphs after vauxite
Place of Conservation of Type Material:
Collections of the Natural History Museum, University of Oslo, Norway, catalogue number 43576 and the Canadian Museum of Nature, Ottawa, Ontario, Canada
Associated Minerals at Type Locality:
CrandalliteSigloite

Synonyms of FerrivauxiteHide

Other Language Names for FerrivauxiteHide

Common AssociatesHide

Associations Based on Photo Data:
4 photos of Ferrivauxite associated with ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
1 photo of Ferrivauxite associated with VauxiteFe2+Al2(PO4)2(OH)2 · 6H2O

Related Minerals - Strunz-mindat GroupingHide

8.DC.FerroberauniteFe2+Fe3+5(PO4)4(OH)5 · 6H2OMon. 2/m : B2/b
8.DC.CésarferreiraiteFe2+ Fe3+2(AsO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.IanbruceiteZn2(AsO4)(OH) · 3H2OMon. 2/m : P21/b
8.DC.05NissoniteCu2Mg2(PO4)2(OH)2 · 5H2OMon. 2/m : B2/b
8.DC.07EuchroiteCu2(AsO4)(OH) · 3H2OOrth. 222 : P212121
8.DC.10LegranditeZn2(AsO4)(OH) · H2OMon. 2/m : P21/b
8.DC.12StrashimiriteCu8(AsO4)4(OH)4 · 5H2OMon.
8.DC.15EarlshannoniteMn2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15KunatiteCuFe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15'UM2006-27-PO:FeHZn'ZnFe3+2(PO4)2(OH)2 · 4H2OMon.
8.DC.15'UKI-2006-(PO:AlCuFeH)'Fe2+Al3+2(PO4)2(OH)2 · 4H2O
8.DC.15CobaltarthuriteCoFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15ArthuriteCuFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15WhitmoreiteFe2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15BendadaiteFe2+Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.17KleemaniteZnAl2(PO4)2(OH)2 · 3H2OMon.
8.DC.20MagnesiobermaniteMgMn3+2(PO4)2(OH)2 · 4H2OMon. 2 : P21
8.DC.20BermaniteMn2+Mn3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P2/b
8.DC.20CoralloiteMn2+Mn3+2(AsO4)2(OH)2 · 4H2OTric. 1 : P1
8.DC.22KovdorskiteMg2(PO4)(OH) · 3H2OMon. 2/m : P21/b
8.DC.25ZincostrunziteZnFe3+2(PO4)2(OH)2 · 6.5H2OTric. 1 : P1
8.DC.25MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.25MetavivianiteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.25FerristrunziteFe3+Fe3+2(PO4)2(OH)3 · 5H2OTric.
8.DC.25StrunziteMn2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.25FerrostrunziteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric.
8.DC.27BerauniteFe3+6(PO4)4O(OH)4 · 6H2OMon. m : Bb
8.DC.27TvrdýiteFe2+Fe3+2Al3(PO4)4(OH)5(H2O)4 · 2H2OMon. 2/m : B2/b
8.DC.27ZincoberauniteZnFe3+5(PO4)4(OH)5 · 6H2OMon. 2/m : B2/b
8.DC.30MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30SigloiteFe3+Al2(PO4)2(OH)3 · 7H2OTric. 1 : P1
8.DC.30NordgauiteMnAl2(PO4)2(F,OH)2 · 5H2OTric. 1 : P1
8.DC.30Kayrobertsonite[MnAl2(PO4)2(OH)2(H2O)4] · 2H2OTric. 1 : P1
8.DC.30KummeriteMn2+Fe3+Al(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30PseudolaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.32KamarizaiteFe3+3(AsO4)2(OH)3 · 3H2OTric. 1 : P1
8.DC.32TinticiteFe3+3(PO4)2(OH)3 · 3H2OTric. 1 : P1
8.DC.35VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.37VantasseliteAl4(PO4)3(OH)3 · 9H2OOrth.
8.DC.40CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2OHex. 6/m : P63/m
8.DC.45SouzaliteMg3Al4(PO4)4(OH)6 · 2H2OTric. 1
8.DC.45Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
8.DC.47KingiteAl3(PO4)2F2(OH) · 7H2OTric.
8.DC.50AllanpringiteFe3+3(PO4)2(OH)3 · 5H2OMon. 2/m : P21/m
8.DC.50FluorwavelliteAl3(PO4)2(OH)2F · 5H2OOrth. mmm(2/m2/m2/m)
8.DC.50WavelliteAl3(PO4)2(OH)3 · 5H2OOrth. mmm(2/m2/m2/m)
8.DC.52KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2OTric. 1 : P1
8.DC.55MapimiteZn2Fe3+3(AsO4)3(OH)4 · 10H2OMon. m : Bm
8.DC.57OgdensburgiteCa2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2OOrth. mmm(2/m2/m2/m) : Cmmm
8.DC.60CloncurryiteCu0.5(VO)0.5Al2(PO4)2F2 · 5H2OMon. 2/m : P21/b
8.DC.60Nevadaite(Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2OOrth. mmm(2/m2/m2/m)
8.DC.62KenngottiteMn2+3Fe3+4(PO4)4(OH)6(H2O)2 Mon. 2/m : P2/b
8.DC.67MolinelloiteCu(H2O)(OH)V4+O(V5+O4)Tric. 1 : P1
8.DC.70WhitecapsiteH16Fe2+5Fe3+14Sb3+6(AsO4)18O16 · 120H2OHex. 6/m : P63/m
8.DC.75HeimitePbCu2(AsO4)(OH)3 · 2H2OMon. 2/m
8.DC.80LedneviteCu[PO3(OH)] · H2OMon. 2/m : P21/b

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 FerrivauxiteHide

References for FerrivauxiteHide

Localities for FerrivauxiteHide

Showing 1 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.
Bolivia (TL)
 
  • Potosí
    • Rafael Bustillo Province
      • Llallagua
Williams et al. (2014) +2 other references
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