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Co(UO2)2(SO4)O2 · 3.5H2O
Member of:
In allusion to its composition, with dominant cobalt, and its relationship to Zippeite.
This page provides mineralogical data about Cobaltzippeite.

Classification of Cobaltzippeite


7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
C : With medium-sized and large cations

10 : Miscellaneous

25 : Sulphates
12 : Sulphates of Co and Ni URL:
Please feel free to link to this page.

Type Occurrence of Cobaltzippeite

Year of Discovery:

Physical Properties of Cobaltzippeite

Hardness (Mohs):
4.948 g/cm3 (Calculated)

Crystallography of Cobaltzippeite

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Space Group Setting:
Cell Parameters:
a = 8.650(4) Å, b = 14.252(9) Å, c = 17.742(10) Å
β = 104.092(19)°
a:b:c = 0.607 : 1 : 1.245
Unit Cell Volume:
V 2,121.41 ų (Calculated from Unit Cell)

Optical Data of Cobaltzippeite

Biaxial (-)
RI values:
nα = 1.747 nβ = 1.779 nγ = 1.840
Max Birefringence:
δ = 0.093
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
r > v

Chemical Properties of Cobaltzippeite

Co(UO2)2(SO4)O2 · 3.5H2O
All elements listed in formula:

Relationship of Cobaltzippeite to other Species

Member of:
Other Members of Group:
MagnesiozippeiteMg(UO2)2(SO4)O2 · 3.5H2O
NatrozippeiteNa5(UO2)8(SO4)4O5(OH)3 · 12H2O
NickelzippeiteNi2(UO2)6(SO4)3(OH)10 · 16H2O
PseudojohanniteCu6.5(UO2)8(SO4)4O8(OH)5 · 25H2O
Sejkoraite-(Y)Y2(UO2)8(SO4)4O6(OH)2 · 26H2O
ZinczippeiteZn(UO2)2(SO4)O2 · 3.5H2O
ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
7.EC.05MagnesiozippeiteMg(UO2)2(SO4)O2 · 3.5H2O
7.EC.05NickelzippeiteNi2(UO2)6(SO4)3(OH)10 · 16H2O
7.EC.05NatrozippeiteNa5(UO2)8(SO4)4O5(OH)3 · 12H2O
7.EC.05ZinczippeiteZn(UO2)2(SO4)O2 · 3.5H2O
7.EC.05ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
7.EC.10RabejaciteCa(UO2)4(SO4)2(OH)6 · 6H2O
7.EC.15MarécottiteMg3(UO2)8(SO4)4O6(OH)2 · 28H2O
7.EC.15Sejkoraite-(Y)Y2(UO2)8(SO4)4O6(OH)2 · 26H2O
7.EC.20PseudojohanniteCu6.5(UO2)8(SO4)4O8(OH)5 · 25H2O
25.12.1BieberiteCoSO4 · 7H2O
25.12.3Aplowite(Co,Mn,Ni)SO4 · 4H2O
25.12.4Moorhouseite(Co,Ni,Mn)SO4 · 6H2O
25.12.5RetgersiteNiSO4 · 6H2O
25.12.6MorenositeNiSO4 · 7H2O
25.12.7NickelblöditeNa2(Ni,Mg)(SO4)2 · 4H2O
25.12.8Nickelboussingaultite(NH4)2Ni(SO4)2 · 6H2O
25.12.9NickelzippeiteNi2(UO2)6(SO4)3(OH)10 · 16H2O
25.12.10Dwornikite(Ni,Fe)SO4 · H2O
25.12.11Honessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
25.12.12Hydrohonessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
25.12.13Nickelhexahydrite(Ni,Mg,Fe)SO4 · 6H2O

Other Names for Cobaltzippeite

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 Cobaltzippeite

Reference List:
Canadian Mineralogist: 14: 429-436.

Burns, P.C., Deely, K.M., and Hayden, L.A. (2003): The crystals chemistry of the Zippeite group. Canadian Mineralogist 41(3), 687-706.

Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist 43, 1839-1894.

Internet Links for Cobaltzippeite

Localities for Cobaltzippeite

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.
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
Jakub Plasil
  • Utah
    • Emery Co.
      • San Rafael District (San Rafael Swell)
    • San Juan Co.
      • White Canyon District
        • White Canyon
          • Copper Point
R&M 53:2 pp 68-71
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