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Ojuelaite

A valid IMA mineral species
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08338420017395468442602.jpg
Ojuelaite, etc.

Esperanza Mine, Kaminiza mines, Km 3, Lavreotiki, East Attica, Attica, Greece
01219140017426737511189.jpg
Ojuelaite

Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico
05344850017395468458127.jpg
Ojuelaite, etc.

Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico
08338420017395468442602.jpg
Ojuelaite, etc.

Esperanza Mine, Kaminiza mines, Km 3, Lavreotiki, East Attica, Attica, Greece
00953710017396093832364.jpg
Ojuelaite

Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico
05344850017395468458127.jpg
Ojuelaite, etc.

Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico
08338420017395468442602.jpg
Ojuelaite, etc.

Esperanza Mine, Kaminiza mines, Km 3, Lavreotiki, East Attica, Attica, Greece
01219140017426737511189.jpg
Ojuelaite

Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico
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About OjuelaiteHide

08116100017271925652546.jpg
Mina Ojuela, Mapimí, Durango, México

Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico
Formula:
ZnFe3+2(AsO4)2(OH)2 · 4H2O
Colour:
Pale yellowish, pale greenish
Lustre:
Vitreous, Silky
Hardness:
3
Specific Gravity:
3.39
Crystal System:
Monoclinic
Member of:
Arthurite Group
Name:
Named in 1981 by Fabien Cesbron, Miguel Romero Sanchez, and Sidney A. Williams for the type locality, Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico.
Arthurite Group.


Unique IdentifiersHide

Mindat ID:
2965
Long-form identifier:
mindat:1:1:2965:6

IMA Classification of OjuelaiteHide

Classification of OjuelaiteHide

Strunz-mindat (2026):
8.DC.15

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
Dana 8th ed.:
42.11.20.3

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
Hey's CIM Ref.:
20.3.20

20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg

Mineral SymbolsHide

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

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference for Standard
OjlIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
OjlThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of OjuelaiteHide

Lustre:
Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
Pale yellowish, pale greenish
Streak:
Pale yellow
Hardness:
3 on Mohs scale
Cleavage:
Imperfect/Fair
{010}, observable
Density:
3.39 g/cm3 (Measured)    3.39 g/cm3 (Calculated)

Optical Data of OjuelaiteHide

Type:
Biaxial (+)
RI values:
nα = 1.696 nβ = 1.730 nγ = 1.798
2V:
Measured: 73° , Calculated: 74°
Max. Birefringence:
δ = 0.102
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.

Surface Relief:
Moderate
Dispersion:
r > v
Pleochroism:
Weak
Comments:
In yellows.

Chemistry of OjuelaiteHide

Mindat Formula:
ZnFe3+2(AsO4)2(OH)2 · 4H2O
Element Weights:
Element% weight
O39.928 %
As26.711 %
Fe19.910 %
Zn11.655 %
H1.797 %

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

Crystallography of OjuelaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 10.237(1) Å, b = 9.662(3) Å, c = 5.562(1) Å
β = 94.36(1)°
Ratio:
a:b:c = 1.06 : 1 : 0.576
Unit Cell V:
548.54 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Acicular crystals or fibers, elongated to 4 mm, commonly in divergent sprays

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014519OjuelaiteHughes J M, Bloodaxe E S, Kobel K D, Drexler J W (1996) The atomic arrangement of ojuelaite, ZnFe(3+)2(AsO4)2(OH)2*4H2O Mineralogical Magazine 60 519-5211996Ojuela mine, Mapimi, Mexico0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.251 Å(100)
2.871 Å(90)
7.03 Å(82)
4.83 Å(78)
10.23 Å(65)
2.630 Å(63)
2.901 Å(62)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47d : [Arsenates, antimonates, selenates, bismuthinates]

Type Occurrence of OjuelaiteHide

Synonyms of OjuelaiteHide

Other Language Names for OjuelaiteHide

Relationship of Ojuelaite to other SpeciesHide

Member of:
Arthurite Group
Other Members of Arthurite Group:
ArthuriteCuFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
BendadaiteFe2+Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
CobaltarthuriteCoFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
EarlshannoniteMn2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
KunatiteCuFe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
'UKI-2006-(PO:AlCuFeH)'Fe2+Al3+2(PO4)2(OH)2 · 4H2O
'UM2006-27-PO:FeHZn'ZnFe3+2(PO4)2(OH)2 · 4H2OMon.
WhitmoreiteFe2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b

Common AssociatesHide

Associations Based on Photo Data:
4 photos of Ojuelaite associated with GoethiteFe3+O(OH)
3 photos of Ojuelaite associated with ParadamiteZn2(AsO4)(OH)
3 photos of Ojuelaite associated with BendadaiteFe2+Fe3+2(AsO4)2(OH)2 · 4H2O
2 photos of Ojuelaite associated with BeudantitePbFe3+3(AsO4)(SO4)(OH)6
2 photos of Ojuelaite associated with CerussitePbCO3
2 photos of Ojuelaite associated with ConichalciteCaCu(AsO4)(OH)
2 photos of Ojuelaite associated with LegranditeZn2(AsO4)(OH) · H2O
2 photos of Ojuelaite associated with ArsendescloizitePbZn(AsO4)(OH)
2 photos of Ojuelaite associated with SideriteFeCO3
1 photo of Ojuelaite associated with PharmacosideriteKFe3+4(AsO4)3(OH)4 · 6-7H2O

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.FerrivauxiteFe3+Al2(PO4)2(OH)3 · 5H2OTric. 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. 2 2 2 : P21 21 21
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.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/m 2/m 2/m)
8.DC.50WavelliteAl3(PO4)2(OH)3 · 5H2OOrth. mmm (2/m 2/m 2/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/m 2/m 2/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/m 2/m 2/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

Thermal Behaviour:
The DTA curve shows a sharp endothermic break at 198°C, a small one at 250°C, and one at 1057°C (fusion). There is an exothermic break at 607°C.
Notes:
Readily soluble in dilute acids.
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 OjuelaiteHide

References for OjuelaiteHide

Localities for OjuelaiteHide

Showing 10 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.
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Agios Konstantinos (Kamariza)
Kolitsch et al. (2010)
Fritz Schreiber collection
          • Mercati mines
Rieck (1999)
        • Km 3
          • Kaminiza mines
Rieck et al. (2018)
Mexico (TL)
 
  • Durango
    • Mapimí Municipality
      • Mapimí
[Bull.Min. (1981) +1 other reference
Moore (2008)
Handbook of Mineralogy Vol. IV pg. 418.
Namibia
 
  • Oshikoto Region
    • Tsumeb
Gebhard (1999)
USA
 
  • New Jersey
    • Sussex County
      • Ogdensburg
        • Sterling Hill
Dunn (1995)
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