Ojuelaite
A valid IMA mineral species
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About Ojuelaite
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:
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.
Type Locality:
Unique Identifiers
Mindat ID:
2965
Long-form identifier:
mindat:1:1:2965:6
GUID
(UUID V4):
(UUID V4):
497d650e-5809-4caf-913b-2cff7b9ac647
IMA Classification of Ojuelaite
Approved
Approval year:
1979
First published:
1981
Classification of Ojuelaite
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
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
42.11.20.3
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
20.3.20
20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg
20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg
Mineral Symbols
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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Ojl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Ojl | The 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 Ojuelaite
Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
Pale yellowish, pale greenish
Streak:
pale yellow
Hardness:
3 on Mohs scale
Cleavage:
Imperfect/Fair
{010}, observable
{010}, observable
Density:
3.39 g/cm3 (Measured) 3.39 g/cm3 (Calculated)
Optical Data of Ojuelaite
Type:
Biaxial (+)
RI values:
nα = 1.696 nβ = 1.730 nγ = 1.798
2V:
Measured: 73° , Calculated: 74°
Max Birefringence:
δ = 0.102
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v
Pleochroism:
Weak
Comments:
In yellows.
Chemistry of Ojuelaite
Mindat Formula:
ZnFe3+2(AsO4)2(OH)2 · 4H2O
Crystallography of Ojuelaite
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)°
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 Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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CIF File Best | x | y | z | a | b | c
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Rotation
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Labels
Console Off | On | Grey | Yellow
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0014519 | Ojuelaite | Hughes 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 60 519-521 | 1996 | Ojuela mine, Mapimi, Mexico | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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 Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Ojuelaite
Place of Conservation of Type Material:
1) University of Pierre and Marie Curie, Paris, France.
2) National Museum of Natural History, Washington, D.C., USA, 145679.
2) National Museum of Natural History, Washington, D.C., USA, 145679.
Associated Minerals at Type Locality:
Reference:
Cesbron, F., Romero, S.M., Williams, A.S. (1981): La mapimite et l'ojuélaïte, deux nouveaux arséniates hydratés de zinc et de fer de la mine Ojuela, Mapimi, Mexique. Bulletin de Minéralogie: 104: 582-586.
Synonyms of Ojuelaite
Other Language Names for Ojuelaite
Relationship of Ojuelaite to other Species
Member of:
Other Members of this group:
Arthurite | CuFe3+2(AsO4)2(OH)2 · 4H2O | Mon. 2/m : P21/b |
Bendadaite | Fe2+Fe3+2(AsO4)2(OH)2 · 4H2O | Mon. 2/m : P21/b |
Cobaltarthurite | (Co,Mg)Fe3+2(AsO4)2(OH)2 · 4H2O | Mon. 2/m : P21/b |
Earlshannonite | Mn2+Fe3+2(PO4)2(OH)2 · 4H2O | Mon. 2/m : P21/b |
Kunatite | CuFe3+2(PO4)2(OH)2 · 4H2O | Mon. 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 · 4H2O | Mon. |
Whitmoreite | Fe2+Fe3+2(PO4)2(OH)2 · 4H2O | Mon. 2/m : P21/b |
Common Associates
Associated Minerals Based on Photo Data:
4 photos of Ojuelaite associated with Goethite | α-Fe3+O(OH) |
3 photos of Ojuelaite associated with Paradamite | Zn2(AsO4)(OH) |
3 photos of Ojuelaite associated with Bendadaite | Fe2+Fe3+2(AsO4)2(OH)2 · 4H2O |
2 photos of Ojuelaite associated with Conichalcite | CaCu(AsO4)(OH) |
2 photos of Ojuelaite associated with Arsendescloizite | PbZn(AsO4)(OH) |
2 photos of Ojuelaite associated with Legrandite | Zn2(AsO4)(OH) · H2O |
2 photos of Ojuelaite associated with Beudantite | PbFe3(AsO4)(SO4)(OH)6 |
2 photos of Ojuelaite associated with Cerussite | PbCO3 |
1 photo of Ojuelaite associated with Franklinite | Zn2+Fe3+2O4 |
1 photo of Ojuelaite associated with Galena | PbS |
Related Minerals - Strunz-mindat Grouping
8.DC. | Ianbruceite | Zn2(AsO4)(OH) · 3H2O |
8.DC. | Césarferreiraite | Fe2+ Fe3+2(AsO4)2(OH)2 · 8H2O |
8.DC. | Ferrivauxite | Fe3+Al2(PO4)2(OH)3 · 5H2O |
8.DC.05 | Nissonite | Cu2Mg2(PO4)2(OH)2 · 5H2O |
8.DC.07 | Euchroite | Cu2(AsO4)(OH) · 3H2O |
8.DC.10 | Legrandite | Zn2(AsO4)(OH) · H2O |
8.DC.12 | Strashimirite | Cu8(AsO4)4(OH)4 · 5H2O |
8.DC.15 | Arthurite | CuFe3+2(AsO4)2(OH)2 · 4H2O |
8.DC.15 | Earlshannonite | Mn2+Fe3+2(PO4)2(OH)2 · 4H2O |
8.DC.15 | Whitmoreite | Fe2+Fe3+2(PO4)2(OH)2 · 4H2O |
8.DC.15 | Cobaltarthurite | (Co,Mg)Fe3+2(AsO4)2(OH)2 · 4H2O |
8.DC.15 | Bendadaite | Fe2+Fe3+2(AsO4)2(OH)2 · 4H2O |
8.DC.15 | Kunatite | CuFe3+2(PO4)2(OH)2 · 4H2O |
8.DC.15 | UM2006-27-PO:FeHZn | ZnFe3+2(PO4)2(OH)2 · 4H2O |
8.DC.15 | UKI-2006-(PO:AlCuFeH) | Fe2+Al3+2(PO4)2(OH)2 · 4H2O |
8.DC.17 | Kleemanite | ZnAl2(PO4)2(OH)2 · 3H2O |
8.DC.20 | Bermanite | Mn2+Mn3+2(PO4)2(OH)2 · 4H2O |
8.DC.20 | Coralloite | Mn2+Mn3+2(AsO4)2(OH)2 · 4H2O |
8.DC.20 | Magnesiobermanite | MgMn3+2(PO4)2(OH)2 · 4H2O |
8.DC.22 | Kovdorskite | Mg2(PO4)(OH) · 3H2O |
8.DC.25 | Ferristrunzite | Fe3+Fe3+2(PO4)2(OH)3 · 5H2O |
8.DC.25 | Ferrostrunzite | Fe2+Fe3+2(PO4)2(OH)2 · 6H2O |
8.DC.25 | Metavauxite | Fe2+Al2(PO4)2(OH)2 · 8H2O |
8.DC.25 | Metavivianite | Fe2+Fe3+2(PO4)2(OH)2 · 6H2O |
8.DC.25 | Strunzite | Mn2+Fe3+2(PO4)2(OH)2 · 6H2O |
8.DC.25 | Zincostrunzite | ZnFe3+2(PO4)2(OH)2 · 6.5H2O |
8.DC.27 | Beraunite | Fe3+6(PO4)4O(OH)4 · 6H2O |
8.DC.27 | Tvrdýite | Fe2+Fe3+2 Al3(PO4)4(OH)5(H2O)4 · 2H2O |
8.DC.27 | Zincoberaunite | ZnFe3+5(PO4)4(OH)5 · 6H2O |
8.DC.30 | Gordonite | MgAl2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Laueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Mangangordonite | Mn2+Al2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Paravauxite | Fe2+Al2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Pseudolaueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Sigloite | Fe3+Al2(PO4)2(OH)3 · 7H2O |
8.DC.30 | Stewartite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Ushkovite | MgFe3+2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Ferrolaueite | Fe2+Fe3+2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Kastningite | (Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O |
8.DC.30 | Maghrebite | MgAl2(AsO4)2(OH)2 · 8H2O |
8.DC.30 | Nordgauite | MnAl2(PO4)2(F,OH)2 · 5H2O |
8.DC.30 | Kayrobertsonite | [MnAl2(PO4)2(OH)2(H2O)4] · 2H2O |
8.DC.30 | Kummerite | Mn2+Fe3+Al(PO4)2(OH)2 · 8H2O |
8.DC.32 | Tinticite | Fe3+3(PO4)2(OH)3 · 3H2O |
8.DC.32 | Kamarizaite | Fe3+3(AsO4)2(OH)3 · 3H2O |
8.DC.35 | Vauxite | Fe2+Al2(PO4)2(OH)2 · 6H2O |
8.DC.37 | Vantasselite | Al4(PO4)3(OH)3 · 9H2O |
8.DC.40 | Cacoxenite | Fe3+24AlO6(PO4)17(OH)12 · 75H2O |
8.DC.45 | Gormanite | (Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O |
8.DC.45 | Souzalite | (Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O |
8.DC.47 | Kingite | Al3(PO4)2F2(OH) · 7H2O |
8.DC.50 | Wavellite | Al3(PO4)2(OH,F)3 · 5H2O |
8.DC.50 | Allanpringite | Fe3+3(PO4)2(OH)3 · 5H2O |
8.DC.50 | Fluorwavellite | Al3(PO4)2(OH)2F · 5H2O |
8.DC.52 | Kribergite | Al5(PO4)3(SO4)(OH)4 · 4H2O |
8.DC.55 | Mapimite | Zn2Fe3+3(AsO4)3(OH)4 · 10H2O |
8.DC.57 | Ogdensburgite | Ca2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2O |
8.DC.60 | Nevadaite | (Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2O |
8.DC.60 | Cloncurryite | Cu0.5(VO)0.5Al2(PO4)2F2 · 5H2O |
8.DC.62 | Kenngottite | Mn2+3Fe3+4(PO4)4(OH)6(H2O)2 |
8.DC.67 | Molinelloite | Cu(H2O)(OH)V4+O(V5+O4) |
8.DC.70 | Whitecapsite | H16Fe2+5Fe3+14Sb3+6(AsO4)18O16 · 120H2O |
8.DC.75 | Heimite | PbCu2(AsO4)(OH)3 · 2H2O |
8.DC.80 | Lednevite | Cu[PO3(OH)] · H2O |
Other Information
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 Ojuelaite
mindat.org URL:
https://www.mindat.org/min-2965.html
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References for Ojuelaite
Localities for Ojuelaite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Greece | |
| Kolitsch et al. (2010) |
Fritz Schreiber collection | |
| |
Rieck (1999) | |
| Rieck et al. (2018) |
Mexico (TL) | |
| [Bull.Min. (1981) +1 other reference |
Thomas P. Moore (2008) | |
Handbook of Mineralogy Vol. IV pg. 418. | |
Namibia | |
| Gebhard (1999) |
USA | |
| Dunn (1995) |
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Esperanza Mine, Kaminiza mines, Km 3, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece