Cobaltoblödite
A valid IMA mineral species
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About Cobaltoblödite
Formula:
Na2Co(SO4)2 · 4H2O
Colour:
Reddish-pink in aggregates.
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.29
Crystal System:
Monoclinic
Member of:
Name:
Co-dominant analogue of blödite.
This page provides mineralogical data about Cobaltoblödite.
Unique Identifiers
Mindat ID:
43582
Long-form identifier:
mindat:1:1:43582:2
GUID
(UUID V4):
(UUID V4):
1054b288-9c95-405a-b3e2-987943cb995b
IMA Classification of Cobaltoblödite
Approved
First published:
2013
Type description reference:
Kasatkin, A. V., Nestola, F., Plášil, J., Marty, J., Belakovskiy, D. I., Agakhanov, A. A., Mills, S. J., Pedron, D., Lanza, A., Favaro, M., Bianchin, S., Lykova, I. S., Goliáš, V., Birch, W. D. (2013) Manganoblödite, Na2Mn(SO4)2·4H2O, and cobaltoblödite, Na2Co(SO4)2·4H2O: two new members of the blödite group from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 77 (3) 367-383 doi:10.1180/minmag.2013.077.3.10
Classification of Cobaltoblödite
7.CC.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
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 |
---|---|---|
Cblö | 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 Cobaltoblödite
Vitreous
Transparency:
Transparent
Colour:
Reddish-pink in aggregates.
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Fracture:
Irregular/Uneven
Density:
2.29(2) g/cm3 (Measured) 2.347 g/cm3 (Calculated)
Optical Data of Cobaltoblödite
Type:
Biaxial (-)
RI values:
nα = 1.498(2) nβ = 1.503(2) nγ = 1.505(2)
2V:
Measured: 70° (10), Calculated: 64°
Max Birefringence:
δ = 0.007
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:
Low
Dispersion:
r > v, weak.
Pleochroism:
Non-pleochroic
Chemistry of Cobaltoblödite
Mindat Formula:
Na2Co(SO4)2 · 4H2O
Crystallography of Cobaltoblödite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 11.147(1) Å, b = 8.268(1) Å, c = 5.5396(7) Å
β = 100.517(11)°
β = 100.517(11)°
Ratio:
a:b:c = 1.348 : 1 : 0.67
Unit Cell V:
501.97 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.551 Å | (80) |
4.269 Å | (50) |
3.795 Å | (18) |
3.339 Å | (43) |
3.290 Å | (100) |
3.258 Å | (58) |
2.644 Å | (21) |
2.296 Å | (22) |
Comments:
From Type Description.
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] | |
Stage 10b: Anthropogenic minerals | <10 Ka |
55 : Anthropogenic mine minerals |
Type Occurrence of Cobaltoblödite
General Appearance of Type Material:
Aggregates of anhedral grains up to 200 μm forming thin crusts covering areas up to 2×2 cm on the surface of other sulfates.
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4271/1, and Museum Victoria, Melbourne, Australia, catalogue number M52196.
Geological Setting of Type Material:
Post mining. Formed in moist adits in a sandstone-hosted uranium deposit.
Associated Minerals at Type Locality:
Reference:
Kasatkin, A.V., Nestola, F., Plášil, J., Marty, J., Belakovskiy, D.I., Agakhanov, A.A., Mills, S.J., Pedron, D., Lanza, A., Favaro, M., Bianchin, S., Lykova, I.S., Goliáš, V., Birch, W.D. (2013) Manganoblödite, Na2Mn(SO4)2•4H2O, and cobaltoblödite, Na2Co(S4O)2•4H2O: two new members of the blödite group from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine: 77: 367-383.
Synonyms of Cobaltoblödite
Relationship of Cobaltoblödite to other Species
Member of:
Other Members of this group:
Blödite | Na2Mg(SO4)2 · 4H2O | Mon. 2/m : P21/b |
Changoite | Na2Zn(SO4)2 · 4H2O | Mon. 2/m : P21/b |
Manganoblödite | Na2Mn(SO4)2 · 4H2O | Mon. 2/m : P21/b |
Nickelblödite | Na2(Ni,Mg)(SO4)2 · 4H2O | Mon. 2/m : P21/b |
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Cobaltoblödite associated with Manganoblödite | Na2Mn(SO4)2 · 4H2O |
Related Minerals - Strunz-mindat Grouping
7.CC. | Andychristyite | PbCu2+Te6+O5(H2O) |
7.CC. | Ammoniovoltaite | (NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18 |
7.CC.05 | Krausite | KFe(SO4)2 · H2O |
7.CC.10 | Tamarugite | NaAl(SO4)2 · 6H2O |
7.CC.15 | Kalinite | KAl(SO4)2 · 11H2O |
7.CC.15 | Mendozite | NaAl(SO4)2 · 11H2O |
7.CC.20 | Lonecreekite | (NH4)Fe3+(SO4)2 · 12H2O |
7.CC.20 | Alum-(K) | KAl(SO4)2 · 12H2O |
7.CC.20 | Alum-(Na) | NaAl(SO4)2 · 12H2O |
7.CC.20 | Tschermigite | (NH4)Al(SO4)2 · 12H2O |
7.CC.20 | Lanmuchangite | Tl+Al(SO4)2 · 12H2O |
7.CC.25 | Voltaite | K2Fe2+5Fe3+3Al(SO4)12 · 18H2O |
7.CC.25 | Zincovoltaite | K2Zn5Fe3+3Al(SO4)12 · 18H2O |
7.CC.25 | Pertlikite | K2(Fe2+,Mg)2Mg4Fe3+2Al(SO4)12 · 18H2O |
7.CC.25 | Ammoniomagnesiovoltaite | (NH4)2Mg2+5Fe3+3Al(SO4)12 · 18H2O |
7.CC.25 | Magnesiovoltaite | K2Mg5Fe3+3Al(SO4)12 · 18H2O |
7.CC.30 | Kröhnkite | Na2Cu(SO4)2 · 2H2O |
7.CC.35 | Ferrinatrite | Na3Fe(SO4)3 · 3H2O |
7.CC.40 | Goldichite | KFe(SO4)2 · 4H2O |
7.CC.45 | Löweite | Na12Mg7(SO4)13 · 15H2O |
7.CC.50 | Blödite | Na2Mg(SO4)2 · 4H2O |
7.CC.50 | Nickelblödite | Na2(Ni,Mg)(SO4)2 · 4H2O |
7.CC.50 | Changoite | Na2Zn(SO4)2 · 4H2O |
7.CC.55 | Leonite | K2Mg(SO4)2 · 4H2O |
7.CC.55 | Mereiterite | K2Fe(SO4)2 · 4H2O |
7.CC.60 | Boussingaultite | (NH4)2Mg(SO4)2 · 6H2O |
7.CC.60 | Cyanochroite | K2Cu(SO4)2 · 6H2O |
7.CC.60 | Mohrite | (NH4)2Fe(SO4)2 · 6H2O |
7.CC.60 | Nickelboussingaultite | (NH4)2Ni(SO4)2 · 6H2O |
7.CC.60 | Picromerite | K2Mg(SO4)2 · 6H2O |
7.CC.60 | Nickelpicromerite | K2Ni(SO4)2 · 6H2O |
7.CC.60 | Katerinopoulosite | (NH4)2Zn(SO4)2 · 6H2O |
7.CC.65 | Polyhalite | K2Ca2Mg(SO4)4 · 2H2O |
7.CC.70 | Leightonite | K2Ca2Cu(SO4)4 · 2H2O |
7.CC.75 | Amarillite | NaFe(SO4)2 · 6H2O |
7.CC.80 | Konyaite | Na2Mg(SO4)2 · 5H2O |
7.CC.85 | Wattevilleite | Na2Ca(SO4)2 · 4H2O (?) |
7.CC.85 | Xocolatlite | Ca2Mn4+2(Te6+O6)2 · H2O |
7.CC.90 | Eckhardite | (Ca,Pb)Cu2+Te6+O5(H2O) |
Fluorescence of Cobaltoblödite
Not fluorescent.
Other Information
Notes:
Dissolves slowly in water water.
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 Cobaltoblödite
mindat.org URL:
https://www.mindat.org/min-43582.html
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Please feel free to link to this page.
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References for Cobaltoblödite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) IMA Commission on New Minerals, Nomenclature and Classification. CNMNC Newsletter No. 15. Mineralogical Magazine, 77 (1) 1-12 doi:10.1180/minmag.2013.077.1.01
Kasatkin, A. V., Nestola, F., Plášil, J., Marty, J., Belakovskiy, D. I., Agakhanov, A. A., Mills, S. J., Pedron, D., Lanza, A., Favaro, M., Bianchin, S., Lykova, I. S., Goliáš, V., Birch, W. D. (2013) Manganoblödite, Na2Mn(SO4)2·4H2O, and cobaltoblödite, Na2Co(SO4)2·4H2O: two new members of the blödite group from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 77 (3) 367-383 doi:10.1180/minmag.2013.077.3.10
Localities for Cobaltoblödite
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.
USA (TL) | |
| Kasatkin et al. (2013) +1 other reference |
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Blue Lizard Mine, Red Canyon Mining District, San Juan County, Utah, USA