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Cobaltoblödite

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About CobaltoblöditeHide

Formula:
Na2Co(SO4)2•4H2O
Colour:
reddish-pink in aggregates
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.29
Crystal System:
Monoclinic
Member of:
Name:
Co-dominant analogue of blödite
This page provides mineralogical data about Cobaltoblödite.


Classification of CobaltoblöditeHide

Approved
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

Physical Properties of CobaltoblöditeHide

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 CobaltoblöditeHide

Type:
Biaxial (-)
RI values:
nα = 1.498(2) nβ = 1.503(2) nγ = 1.505(2)
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of CobaltoblöditeHide

Formula:
Na2Co(SO4)2•4H2O
IMA Formula:
Na2Co(SO4)2 · 4H2O

Crystallography of CobaltoblöditeHide

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)°
Ratio:
a:b:c = 1.348 : 1 : 0.67
Unit Cell V:
501.97 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.551Å(80)
4.269Å(50)
3.795Å(18)
3.339Å(43)
3.290Å(100)
3.258Å(58)
2.644Å(21)
2.296Å(22)
Comments:
From Type Description.

Type Occurrence of CobaltoblöditeHide

General Appearance of Type Material:
aggregates of anhedral grains up to 60 200 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:
Blue Lizard mine, Red Canyon, White Canyon District, San Juan County, Utah
Associated Minerals at Type Locality:

Synonyms of CobaltoblöditeHide

Relationship of Cobaltoblödite to other SpeciesHide

Member of:
Other Members of this group:
BlöditeNa2Mg(SO4)2 · 4H2OMon. 2/m
ChangoiteNa2Zn(SO4)2 · 4H2OMon. 2/m : P21/b
ManganoblöditeNa2Mn(SO4)2·4H2O Mon. 2/m : P21/b
NickelblöditeNa2(Ni,Mg)(SO4)2 · 4H2O

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Cobaltoblödite associated with ManganoblöditeNa2Mn(SO4)2·4H2O

Related Minerals - Nickel-Strunz GroupingHide

7.CC.AndychristyitePbCu2+Te6+O5(H2O)Tric. 1 : P1
7.CC.Ammoniovoltaite(NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18Iso. m3m (4/m 3 2/m) : Fd3c
7.CC.05KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
7.CC.10TamarugiteNaAl(SO4)2 · 6H2OMon. 2/m
7.CC.15KaliniteKAl(SO4)2 · 11H2OMon. 2/m : B2/b
7.CC.15MendoziteNaAl(SO4)2 · 11H2OMon. 2/m
7.CC.20Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso.
7.CC.20Alum-(K)KAl(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20Alum-(Na)NaAl(SO4)2 · 12H2O
7.CC.20Tschermigite(NH4)Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20LanmuchangiteTl+Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.25VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25PertlikiteK2(Fe2+,Mg)2Mg4Fe3+2Al(SO4)12 · 18H2OTet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.CC.25Ammoniomagnesiovoltaite(NH4)2Mg2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.30KröhnkiteNa2Cu(SO4)2 · 2H2OMon. 2/m : P21/b
7.CC.35FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
7.CC.40GoldichiteKFe(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.45LöweiteNa12Mg7(SO4)13 · 15H2OTrig.
7.CC.50BlöditeNa2Mg(SO4)2 · 4H2OMon. 2/m
7.CC.50NickelblöditeNa2(Ni,Mg)(SO4)2 · 4H2O
7.CC.50ChangoiteNa2Zn(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.55LeoniteK2Mg(SO4)2 · 4H2OMon. 2/m
7.CC.55MereiteriteK2Fe(SO4)2 · 4H2OMon.
7.CC.60Boussingaultite(NH4)2Mg(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60CyanochroiteK2Cu(SO4)2 · 6H2OMon. 2/m
7.CC.60Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60Nickelboussingaultite(NH4)2Ni(SO4)2 · 6H2O
7.CC.60PicromeriteK2Mg(SO4)2 · 6H2OMon. 2/m
7.CC.65PolyhaliteK2Ca2Mg(SO4)4 · 2H2OTric. 1
7.CC.70LeightoniteK2Ca2Cu(SO4)4 · 2H2OTric.
7.CC.75AmarilliteNaFe(SO4)2 · 6H2OMon. 2/m : B2/b
7.CC.80KonyaiteNa2Mg(SO4)2 · 5H2OMon. 2/m : P21/b
7.CC.85WattevilleiteNa2Ca(SO4)2 · 4H2O (?)Orth.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for CobaltoblöditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kasatkin, A.V., Nestola, F., Pla´sˇil, J., Marty, J., Belakovskiy, D.I., Agakhanov, A.A., Mills, S.J., Lanza, A., Favaro, M. and Bianchin, S. (2013) Cobaltoblödite, IMA 2012- 059. CNMNC Newsletter No. 15, February 2013, page 5; Mineralogical Magazine, 77, 1-12.
A.V. Kasatkin, F. Nestola, J. Plášil, J. Marty, D.I. Belakovskiy, A.A. Agakhanov, S.J. Mills, D. Pedron, A. Lanza, M. Favaro, S. Bianchin, I.S. Lykova, V. Goliáš, W.D. Birch (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. Mineral. Mag. 77, 367-383.
Delyana Marinova, Manfred Wildner, Tsvetelina Bancheva, Radostina Stoyanova, Mitko Georgiev, Donka G. Stoilova (2018): Synthesis, structure and properties of blödite-type solid solutions, Na2Co1−xCux(SO4)2·4H2O (0 < x ≤ 0.18), and crystal structure of synthetic kröhnkite, Na2Cu(SO4)2·2H2O. Physics and Chemistry of Minerals 45, 801-817.

Internet Links for CobaltoblöditeHide

Localities for CobaltoblöditeHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Utah
    • San Juan Co.
      • Red Canyon
Kasatkin, A.V., Nestola, F., Pla´sˇil, J., Marty, J., Belakovskiy, D.I., Agakhanov, A.A., Mills, S.J., Lanza, A., Favaro, M. and Bianchin, S. (2013) Cobaltoblödite, IMA 2012- 059. CNMNC Newsletter No. 15, February 2013, page 5; Mineralogical Magazine, 77, 1-12.
 
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