Coconinoite
A valid IMA mineral species
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About Coconinoite
Logo of Coconino County, Arizona, USA
Formula:
Fe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2O
Colour:
Pale creamy yellow
Specific Gravity:
2.70
Crystal System:
Monoclinic
Name:
Named for Coconino county, Arizona, USA, which includes the type locality.
Co-Type Localities:
This page provides mineralogical data about Coconinoite.
Unique Identifiers
Mindat ID:
1102
Long-form identifier:
mindat:1:1:1102:6
IMA Classification of Coconinoite
Approved
Approval year:
1965
First published:
1966
Classification of Coconinoite
8.EB.35
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
43.5.5.1
43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
22.3.20
22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Coc | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Coconinoite
Transparency:
Translucent
Colour:
Pale creamy yellow
Comment:
Soft
Density:
2.70 g/cm3 (Measured) 2.68 g/cm3 (Calculated)
Optical Data of Coconinoite
Type:
Biaxial (-)
RI values:
nα = 1.550 nβ = 1.588 nγ = 1.590
2V:
Measured: 28° to 43°, Calculated: 24°
Max. Birefringence:
δ = 0.040
Based on recorded range of RI values above.
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.
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 strong
Pleochroism:
Visible
Comments:
X= colorless
Y=Z= pale yellow
Y=Z= pale yellow
Chemistry of Coconinoite
Mindat Formula:
Fe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2O
Element Weights:
Common Impurities:
Fe,Cr
Crystallography of Coconinoite
Crystal System:
Monoclinic
Cell Parameters:
a = 12.45(6) Å, b = 12.96(3) Å, c = 17.22(5) Å
β = 105.7°
β = 105.7°
Ratio:
a:b:c = 0.961 : 1 : 1.329
Unit Cell V:
2,674.82 ų (Calculated from Unit Cell)
Morphology:
Lathlike to platy grains, microcrystalline aggregates, seams, crusts.
Comment:
Tentative cell (from Belova et al., 1993); probable space group: C2/c or Cc.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.3 Å | (8) |
| 11.1 Å | (100) |
| 9.2 Å | (3) |
| 8.66 Å | (8) |
| 8.40 Å | (3) |
| 7.66 Å | (8) |
| 7.28 Å | (3) |
| 6.24 Å | (2) |
| 5.91 Å | (3) |
| 5.64 Å | (18) |
| 5.56 Å | (40) |
| 5.02 Å | (9) |
| 4.59 Å | (14) |
| 4.50 Å | (3) |
| 4.31 Å | (10) |
| 4.21 Å | (2) |
| 4.17 Å | (4) |
| 4.05 Å | (7) |
| 3.97 Å | (3) |
| 3.91 Å | (6) |
| 3.82 Å | (5) |
| 3.77 Å | (7) |
| 3.71 Å | (12) |
| 3.46 Å | (2) |
| 3.39 Å | (5) |
| 3.36 Å | (1) |
| 3.30 Å | (20) |
| 3.26 Å | (1) |
| 3.18 Å | (6) |
| 3.12 Å | (3b) |
| 3.04 Å | (1) |
| 3.00 Å | (5) |
| 2.84 Å | (7) |
| 2.80 Å | (4) |
| 2.67 Å | (7) |
| 2.56 Å | (3b) |
Comments:
ICDD 25-16. Also numerous weak lines down to 1.040 (See Young, 1966).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Coconinoite
Co-Type Localities:
Geological Setting of Type Material:
In seams 1 mm or less thick, mostly along bedding planes of a light-colored, arkosic, fine-grained, poorly sorted & thinly bedded sandstone.
Synonyms of Coconinoite
Other Language Names for Coconinoite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.EB. | Meta-autunite Group | A1-2(UO2)2(TO4)2 · 5-10H2O |
| 8.EB.05 | Rauchite | Ni(UO2)2(AsO4)2 · 10H2O |
| 8.EB.05 | Uranocircite | Ba(UO2)2(PO4)2 · 10H2O |
| 8.EB.05 | Uranospinite | Ca(UO2)2(AsO4)2 · 10H2O |
| 8.EB.05 | Zeunerite | Cu(UO2)2(AsO4)2 · 12H2O |
| 8.EB.05 | Metarauchite | Ni(UO2)2(AsO4)2 · 8H2O |
| 8.EB.05 | Heinrichite | Ba(UO2)2(AsO4)2 · 10H2O |
| 8.EB.05 | Kahlerite | Fe(UO2)2(AsO4)2 · 12H2O |
| 8.EB.05 | Hydronováčekite | Mg(UO2)2(AsO4)2 · 12H2O |
| 8.EB.05 | Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
| 8.EB.05 | Nováčekite | Mg(UO2)2(AsO4)2 · 10H2O |
| 8.EB.05 | Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
| 8.EB.05 | Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
| 8.EB.05 | Xiangjiangite | (Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2O |
| 8.EB.10 | Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O |
| 8.EB.10 | Lehnerite | Mn2+(UO2)2(PO4)2 · 8H2O |
| 8.EB.10 | Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| 8.EB.10 | Metasaléeite | Mg(UO2)2(PO4)2 · 8H2O |
| 8.EB.10 | Metauranocircite | Ba(UO2)2(PO4)2 · 7H2O |
| 8.EB.10 | Metauranospinite | Ca(UO2)2(AsO4)2 · 8H2O |
| 8.EB.10 | Metaheinrichite | Ba(UO2)2(AsO4)2 · 8H2O |
| 8.EB.10 | Metakahlerite | Fe2+(UO2)2(AsO4)2 · 8H2O |
| 8.EB.10 | Metakirchheimerite | Co(UO2)2(AsO4)2 · 8H2O |
| 8.EB.10 | Metanováčekite | Mg(UO2)2(AsO4)2 · 8H2O |
| 8.EB.10 | Metanatroautunite | Na(UO2)(PO4)(H2O)3 |
| 8.EB.10 | Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
| 8.EB.10 | Metazeunerite | Cu(UO2)2(AsO4)2 · 8H2O |
| 8.EB.10 | Przhevalskite | Pb2(UO2)3(PO4)2(OH)4 · 3H2O |
| 8.EB.10 | Pseudo-autunite | (H3O)4Ca2(UO2)2(PO4)4 · 5H2O |
| 8.EB.15 | Abernathyite | K(UO2)(AsO4) · 3H2O |
| 8.EB.15 | Uramphite | (NH4)2(UO2)2(PO4)2 · 6H2O |
| 8.EB.15 | Meta-ankoleite | K2(UO2)2(PO4)2 · 6H2O |
| 8.EB.15 | Natrouranospinite | Na2(UO2)2(AsO4)2 · 5H2O |
| 8.EB.15 | Trögerite | (H3O)(UO2)(AsO4) · 3H2O |
| 8.EB.15 | Chernikovite | (H3O)2(UO2)2(PO4)2 · 6H2O |
| 8.EB.15 | Uramarsite | (NH4)(UO2)(AsO4) · 3H2O |
| 8.EB.20 | Chistyakovaite | Al(UO2)2(AsO4)2(F,OH) · 6.5H2O |
| 8.EB.20 | Threadgoldite | Al(UO2)2(PO4)2(OH) · 8H2O |
| 8.EB.25 | Uranospathite | (Al,◻)(UO2)2(PO4)2F · 20(H2O,F) |
| 8.EB.25 | Arsenuranospathite | Al(UO2)2(AsO4)2F · 20H2O |
| 8.EB.30 | Vochtenite | (Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O |
| 8.EB.40 | Ranunculite | HAl(UO2)(PO4)(OH)3 · 4H2O |
| 8.EB.45 | Triangulite | Al3(UO2)4(PO4)4(OH)5 · 5H2O |
| 8.EB.50 | Furongite | Al13(UO2)7(PO4)13(OH)14 · 58H2O |
| 8.EB.55 | Sabugalite | HAl(UO2)4(PO4)4 · 16H2O |
| 8.EB.60 | Horákite | (Bi7O7OH)[(UO2)4(PO4)2(AsO4)2(OH)2] · 3.5H2O |
Radioactivity
Radioactivity:
| Element | % Content | Activity (Bq/kg) | Radiation Type |
|---|---|---|---|
| Uranium (U) | 30.2072% | 7,551,800 | α, β, γ |
| Thorium (Th) | 0.0000% | 0 | α, β, γ |
| Potassium (K) | 0.0000% | 0 | β, γ |
For comparison:
- Banana: ~15 Bq per fruit
- Granite: 1,000–3,000 Bq/kg
- EU exemption limit: 10,000 Bq/kg
Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.
Interactive Simulator:
Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!
Activity: –
| Distance | Dose rate | Risk |
|---|---|---|
| 1 cm | ||
| 10 cm | ||
| 1 m |
The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).
D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield
Other Information
Health Risks:
Radioactive
Internet Links for Coconinoite
mindat.org URL:
https://www.mindat.org/min-1102.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Coconinoite
Localities for Coconinoite
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Argentina | |
| O. Morello y C. N. Reyes Encinas (1990) |
| O. Morello y C. N. Reyes Encinas (1990) | |
| M. E. Saulnier y F. Greco (1988) | |
Italy | |
| Lecca et al. (2011) |
Switzerland | |
| Meisser (2012) |
USA | |
| Young et al. (1966) +1 other reference |
| Young et al. (1966) +1 other reference |
| Young et al. (1966) +1 other reference |
| Young et al. (1966) |
| Young et al. (1966) +1 other reference |
| Mineralogical Society of America - ... | |
Uzbekistan | |
| Belova +6 other references |
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Jomac Mine, White Canyon Mining District, San Juan County, Utah, USA