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Okieite
A valid IMA mineral species
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About Okieite
Formula:
Mg3[V10O28] Ā· 28H2O
Colour:
Bright red to red orange to yellow orange
Lustre:
Vitreous
Hardness:
1½
Specific Gravity:
2.20
Crystal System:
Triclinic
Member of:
Name:
The name okieite is for Craig (āOkieā) Howell of Naturita, Colorado.
An uncommon decavanadate species found as a post-mining mineral in sandstone-hosted uranium-vanadium deposits. Unstable outside of a humid environment and slowly dehydrates.
Unique Identifiers
Mindat ID:
53199
Long-form identifier:
mindat:1:1:53199:5
Similar Names
| Oakite | A synonym of Lithiophorite |
| Okaite | A rock classification type |
Classification of Okieite
The Decavanadate Cluster
The decavanadate cluster found in okieite. The same cluster is known in a number of other secondary vanadium minerals including, for example, pascoite, hughesite, and wernerbaurite.
IMA Classification of Okieite
Approved
IMA Formula:
[Mg3(H2O)18][V5+10O28]Ā·10H2O
Approval year:
2018
First published:
2020
Type description reference:
4.HC.50
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
C : [6]-Sorovanadates
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
C : [6]-Sorovanadates
Mineral Symbols
As of 2021 there are now IMAāCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Oki | IMAāCNMNC | Warr, L.N. (2021). IMAāCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Okieite
Vitreous
Transparency:
Transparent
Colour:
Bright red to red orange to yellow orange
Streak:
Light orange yellow
Hardness:
1½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
2.20(2) g/cm3 (Measured) 2.186 g/cm3 (Calculated)
Optical Data of Okieite
Type:
Biaxial (-)
RI values:
nα = 1.720(3) nβ = 1.745(3) nγ = 1.765(3)
2V:
Measured: 84° (2), Calculated: 82.5°
Max. Birefringence:
δ = 0.045
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 Āµm 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.
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 Āµm 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:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
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 biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
Strong, r < v
Pleochroism:
Not Visible
Comments:
X Ī a = 37Ā°, Y Ī c = 28Ā°, Z Ī b = 31Ā°
Chemistry of Okieite
Mindat Formula:
Mg3[V10O28] Ā· 28H2O
Element Weights:
Elements listed:
Crystallography of Okieite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 10.5566(2) Å, b = 10.7566(2) Å, c = 21.355(1) Å
α = 90.015(6)°, β = 97.795(7)°, γ = 104.337(7)°
α = 90.015(6)°, β = 97.795(7)°, γ = 104.337(7)°
Ratio:
a:b:c = 0.981 : 1 : 1.985
Unit Cell V:
2,326.25 Ć
Ā³ (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.04 Ć | (17) |
| 9.71 Ć | (100) |
| 8.32 Ć | (19) |
| 6.42 Ć | (12) |
| 3.150 Ć | (9) |
| 3.024 Ć | (7) |
| 2.621 Ć | (10) |
| 2.087 Ć | (7) |
Reference:
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Okieite
Co-Type Localities:
General Appearance of Type Material:
Equant to prismatic, commonly appearing like curving columns (up to about 3 mm in length) and often exhibiting rounded faces.
Place of Conservation of Type Material:
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 66784 and 66785 (Burro mine) and 66786 (Hummer mine)
Associated Minerals at Type Locality:
Reference:
Synonyms of Okieite
Other Language Names for Okieite
Relationship of Okieite to other Species
Member of:
Other Members of Pascoite Family:
| Ammoniolasalite | [(NH4)2Mg2(H2O)20] [V10O28] | Mon. 2/m : B2/b |
| Bluestreakite | K4Mg2(V4+2V5+8O28) Ā· 14H2O | Mon. 2/m : P21/c |
| Burroite | Ca2(NH4)2(V10O28) Ā· 15H2O | Tric. 1 : P1 |
| Caseyite | [(V5+O2)Al10-x(OH)20-2x(H2O)18-2x]2[H2V4+V5+9O28][V5+10O28]2(Na,K,Ca)2-y(SO4)2-z Ā· (60+8x+y+4z)H2O (x = 0-2.5; y = 0-2; z = 0-2) | Mon. 2/m : P21/c |
| Flatimerite | [Al13(OH)24(H2O)24][V5+9V4+O28] Ā· [(SO4)4(H2O)24] | Tric. 1 : P1 |
| Gunterite | Na4Ca(V10O28) Ā· 20H2O | Mon. 2/m : B2/m |
| Huemulite | Na4Mg(V10O28) Ā· 24H2O | Tric. |
| Hughesite | Na3Al(V10O28) Ā· 22H2O | Tric. 1 : P1 |
| Hummerite | K2Mg2(V10O28) Ā· 16H2O | Tric. 1 : P1 |
| Hydropascoite | Ca3(V10O28) Ā· 24H2O | Tric. 1 : P1 |
| Kokinosite | Na2Ca2(V10O28) Ā· 24H2O | Tric. 1 : P1 |
| Lasalite | Na2Mg2(V10O28) Ā· 20H2O | Mon. 2/m : B2/b |
| Magnesiopascoite | Ca2Mg(V10O28) Ā· 16H2O | Mon. 2/m : B2/m |
| Nashite | Na3Ca2[(V5+9V4+)O28] Ā· 24H2O | Mon. 2/m : P21/m |
| Pascoite | Ca2Ca(V10O28) Ā· 17H2O | Mon. 2 : B2 |
| Postite | Mg(H2O)6Al2(OH)2(H2O)8(V10O28) Ā· 13H2O | Orth. mmm(2/m2/m2/m) : Pccn |
| Protocaseyite | [Al4(OH)6(H2O)12][V10O28] Ā· 8H2O | Tric. 1 : P1 |
| Rakovanite | (NH4)3Na3(V10O28) Ā· 12H2O | Mon. 2/m : P21/c |
| Schindlerite | {(NH4)4Na2(H2O)10}{V10O28} | Tric. 1 : P1 |
| Trebiskyite | Na3Mg2[TiV9O28] Ā· 22H2O | Mon. 2/m : P21/c |
| Wernerbaurite | {(NH4)2[Ca2(H2O)14](H2O)2}{V10O28} | Tric. 1 : P1 |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.HC. | Protocaseyite | [Al4(OH)6(H2O)12][V10O28] Ā· 8H2O |
| 4.HC. | Ammoniolasalite | [(NH4)2Mg2(H2O)20] [V10O28] |
| 4.HC. | Beckettite | Ca2V6Al6O20 |
| 4.HC. | Flatimerite | [Al13(OH)24(H2O)24][V5+9V4+O28] Ā· [(SO4)4(H2O)24] |
| 4.HC.05 | Pascoite | Ca2Ca(V10O28) Ā· 17H2O |
| 4.HC.05 | Hydropascoite | Ca3(V10O28) Ā· 24H2O |
| 4.HC.05 | Lasalite | Na2Mg2(V10O28) Ā· 20H2O |
| 4.HC.05 | Hughesite | Na3Al(V10O28) Ā· 22H2O |
| 4.HC.05 | Magnesiopascoite | Ca2Mg(V10O28) Ā· 16H2O |
| 4.HC.05 | Rakovanite | (NH4)3Na3(V10O28) Ā· 12H2O |
| 4.HC.10 | Hummerite | K2Mg2(V10O28) Ā· 16H2O |
| 4.HC.15 | Sherwoodite | Ca5.5(AlV4+V5+12O39) Ā· 28H2O |
| 4.HC.20 | Bluestreakite | K4Mg2(V4+2V5+8O28) Ā· 14H2O |
| 4.HC.25 | Wernerbaurite | {(NH4)2[Ca2(H2O)14](H2O)2}{V10O28} |
| 4.HC.25 | Burroite | Ca2(NH4)2(V10O28) Ā· 15H2O |
| 4.HC.30 | Caseyite | [(V5+O2)Al10-x(OH)20-2x(H2O)18-2x]2[H2V4+V5+9O28][V5+10O28]2(Na,K,Ca)2-y(SO4)2-z Ā· (60+8x+y+4z)H2O (x = 0-2.5; y = 0-2; z = 0-2) |
| 4.HC.35 | Gunterite | Na4Ca(V10O28) Ā· 20H2O |
| 4.HC.40 | Kokinosite | Na2Ca2(V10O28) Ā· 24H2O |
| 4.HC.45 | Nashite | Na3Ca2[(V5+9V4+)O28] Ā· 24H2O |
| 4.HC.55 | Postite | Mg(H2O)6Al2(OH)2(H2O)8(V10O28) Ā· 13H2O |
| 4.HC.60 | Schindlerite | {(NH4)4Na2(H2O)10}{V10O28} |
Fluorescence of Okieite
Not fluorescent
Other Information
Notes:
Rapidly soluble in H2O at room temperature. Dehydrates readily in air at low relative humidity.
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 Okieite
mindat.org URL:
https://www.mindat.org/min-53199.html
Please feel free to link to this page.
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References for Okieite
Reference List:
HƄlenius, Ulf, Hatert, FrƩdƩric, Pasero, Marco, Mills, Stuart J. (2018) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 46. European Journal of Mineralogy, 30 (6) 1181-1189 doi:10.1127/ejm/2018/0030-2819
Localities for Okieite
Showing 4 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ā - 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.
USA (TL) | |
| HĆ„lenius et al. (2018) +1 other reference |
| HĆ„lenius et al. (2018) |
| Desor (04/2020) |
| Joe Marty Collection |
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Vanadium Queen Mine, La Sal Creek Mining District, San Juan County, Utah, USA