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Cobaltoblödite

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

Classification of Cobaltoblödite

Approved
mindat.org URL:
http://www.mindat.org/min-43582.html
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Type Occurrence of Cobaltoblödite

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

Physical Properties of Cobaltoblödite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
reddish-pink in aggregates
Streak:
white
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Fracture:
Irregular/Uneven
Density:
2.29(2) g/cm3 (Measured)    2.347 g/cm3 (Calculated)

Crystallography of Cobaltoblödite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group 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 Volume:
V 501.97 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.551(80)
4.269(50)
3.795(18)
3.339(43)
3.290(100)
3.258(58)
2.644(21)
2.296(22)
Comments:
From Type Description.

Optical Data of Cobaltoblödite

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 Cobaltoblödite

Formula:
Na2Co(SO4)2•4H2O
All elements listed in formula:

Relationship of Cobaltoblödite to other Species

Member of:
Other Members of Group:
BlöditeNa2Mg(SO4)2 · 4H2O
ChangoiteNa2Zn(SO4)2 · 4H2O
ManganoblöditeNa2Mn(SO4)2·4H2O
NickelblöditeNa2(Ni,Mg)(SO4)2 · 4H2O

Other Names for Cobaltoblödite

Name in Other Languages:

Other Information

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 Cobaltoblödite

Reference List:
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.

Internet Links for Cobaltoblödite

Localities for Cobaltoblödite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
USA (TL)
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • 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.
Mineral and/or Locality  
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