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Cobalttsumcorite

A valid IMA mineral species
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09032550015780605178482.jpg
Cobalttsumcorite

Roter Berg mining district, Zschorlau, Erzgebirgskreis, Saxony, Germany
00500560016697959782440.jpg
Cobalttsumcorite, etc.

Torgal Mine, São Luís, Odemira, Beja, Portugal
07990600016835443422351.jpg
Cobalttsumcorite

Roter Berg mining district, Zschorlau, Erzgebirgskreis, Saxony, Germany
00562490015040216206189.jpg
Cobalttsumcorite

Roter Berg mining district, Zschorlau, Erzgebirgskreis, Saxony, Germany
09729420016680115646825.jpg
Cobalttsumcorite, etc.

Torgal Mine, São Luís, Odemira, Beja, Portugal
09903660016834714201612.jpg
Cobalttsumcorite

Roter Berg mining district, Zschorlau, Erzgebirgskreis, Saxony, Germany
09032550015780605178482.jpg
Cobalttsumcorite

Roter Berg mining district, Zschorlau, Erzgebirgskreis, Saxony, Germany
00500560016697959782440.jpg
Cobalttsumcorite, etc.

Torgal Mine, São Luís, Odemira, Beja, Portugal
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About CobalttsumcoriteHide

Formula:
PbCo2(AsO4)2 · 2H2O
Co may be replaced by minor Fe3+.
Colour:
Brown to red-brown
Lustre:
Adamantine
Hardness:
4½
Specific Gravity:
5.31 (Calculated)
Crystal System:
Monoclinic
Name:
For the relationship to Tsumcorite
Tsumcorite Group.

The cobalt analogue of Nickeltsumcorite.



Unique IdentifiersHide

Mindat ID:
7095
Long-form identifier:
mindat:1:1:7095:5
GUID
(UUID V4):
fcb62f3a-73b7-4918-81bb-1204e34fa8ca

IMA Classification of CobalttsumcoriteHide

IMA status:
Approved
Approval year:
1999
First published:
2001

Classification of CobalttsumcoriteHide

Strunz-mindat (2024):
8.CG.15

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
CtsmIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of CobalttsumcoriteHide

Lustre:
Adamantine
Transparency:
Transparent
Colour:
Brown to red-brown
Streak:
Light brown
Hardness:
4½ on Mohs scale
Hardness:
VHN25=500 kg/mm2 - Vickers
Hardness Data:
Measured
Cleavage:
Distinct/Good
on {001}
Fracture:
Conchoidal
Density:
5.31 g/cm3 (Calculated)

Optical Data of CobalttsumcoriteHide

Type:
Biaxial (+)
RI values:
nα = 1.920 nβ = 1.940 nγ = 1.980
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
none
Optical Extinction:
X ∧ c = 15º (in acute angle β); Y = b; Z ∧ a = 40º (in obtuse angle β).
Pleochroism:
Strong
Comments:
X = light brown; Y = red-brown; Z = yellow

Chemistry of CobalttsumcoriteHide

Mindat Formula:
PbCo2(AsO4)2 · 2H2O

Co may be replaced by minor Fe3+.
Elements listed:
As, Co, H, O, Pb - search for minerals with similar chemistry

Crystallography of CobalttsumcoriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.097 Å, b = 6.313 Å, c = 7.555 Å
β = 115.08°
Ratio:
a:b:c = 1.441 : 1 : 1.197
Unit Cell V:
393 ų
Z:
2
Morphology:
{201} dominant, {001} and {111}.
Twinning:
None mentioned.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014915CobalttsumcoriteKrause W, Bernhardt H J, Effenberger H, Martin M (2001) Cobalttsumcorite and nickellotharmeyerite, two new minerals from Schneeberg, Germany: description and crystal structure Neues Jahrbuch fur Mineralogie, Monatshefte 2001 588-5762001Schneeberg, Germany0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.656 Å(87)
4.462 Å(96)
3.243 Å(100)
3.010 Å(58)
2.868 Å(50)
2.733 Å(47)
2.538 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47d : [Arsenates, antimonates, selenates, bismuthinates]

Type Occurrence of CobalttsumcoriteHide

Type Locality:
ⓘ Roter Berg mining district, Zschorlau, Erzgebirgskreis, Saxony, Germany
General Appearance of Type Material:
Rosettes to 2 mm across, consisting of tabular crystals to 0.3 mm.
Place of Conservation of Type Material:
Geoscientific Collections at the Freiberg University of Mining and Technology, Saxony, Germany.
Geological Setting of Type Material:
From the oxidation zone of the deposit.
Associated Minerals at Type Locality:
PlumbogummiteMawbyiteGalenaCobaltlotharmeyeriteArseniosiderite

Synonyms of CobalttsumcoriteHide

Other Language Names for CobalttsumcoriteHide

Relationship of Cobalttsumcorite to other SpeciesHide

Member of:
Tsumcorite Group
Other Members of this group:
AlumolukrahniteCa[CuAl](AsO4)2(H2O,OH)2Tric. 1 : P1
CabalzariteCaMg2(AsO4)2 · 2H2OMon. 2/m : B2/m
CobaltlotharmeyeriteCaCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
FerrilotharmeyeriteCaZnFe3+(AsO4)2(OH) · H2OMon. 2/m : B2/m
GartrellitePbCuFe3+(AsO4)2(OH) · H2OTric. 1 : P1
HelmutwinkleritePbZn2(AsO4)2 · 2H2OTric. 1 : P1
KaliochalciteKCu2(SO4)2[(OH)(H2O)]Mon. 2/m : B2/m
KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
LotharmeyeriteCaZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
LukrahniteCaCuFe3+(AsO4)2(OH,H2O)2Tric. 1 : P1
ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
MawbyitePbFe3+2(AsO4)2(OH)2Mon. 2/m : B2/m
MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
NickellotharmeyeriteCaNi2(AsO4)2 · 2H2OMon. 2/m : B2/m
NickelschneebergiteBiNi2(AsO4)2(OH) · H2OMon. 2/m : B2/m
NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2(H2O,OH)2Mon. 2/m : B2/m
PhosphogartrellitePbCuFe3+(PO4)2(OH,H2O)2Tric. 1 : P1
RappolditePbCo2(AsO4)2 · 2H2OTric. 1 : P1
SchneebergiteBiCo2(AsO4)2(OH) · H2OMon. 2/m : B2/m
ThometzekitePbCu2+2(AsO4)2 · 2H2OMon. 2/m : B2/m
TsumcoritePbZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
YancowinnaitePbCuAl(AsO4)2OH · H2O Tric. 1 : P1
ZincgartrellitePbZn2(AsO4)2(H2O,OH)2Tric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Cobalttsumcorite associated with MimetitePb5(AsO4)3Cl

Related Minerals - Strunz-mindat GroupingHide

8.CG.Ca-HuréauliteCaMn5(PO4)4 · 4H2O
8.CG.FluckiteCaMn2+(AsO3OH)2 · 2H2OTric. 1 : P1
8.CG.DondoelliteCa2Fe(PO4)2 · 2H2OTric. 1 : P1
8.CG.AlumolukrahniteCa[CuAl](AsO4)2(H2O,OH)2Tric. 1 : P1
8.CG.05CassidyiteCa2Ni(PO4)2 · 2H2OTric.
8.CG.05CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
8.CG.05FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05AnorthoroseliteCa2Co(AsO4)2 · 2H2OTric.
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05HilliteCa2Zn(PO4)2 · 2H2OTric. 1 : P1
8.CG.05Unnamed (Fe2+-analogue of Parabrandtite)Ca2Fe2+(AsO4)2 · 2H2O
8.CG.10BrandtiteCa2Mn2+(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RoseliteCa2Co(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10Unnamed (Fe2+-analogue of Brandtite)Ca2Fe2+(AsO4)2 · 2H2O
8.CG.15FerrilotharmeyeriteCaZnFe3+(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15LotharmeyeriteCaZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15MawbyitePbFe3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
8.CG.15ThometzekitePbCu2+2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15CobaltlotharmeyeriteCaCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15CabalzariteCaMg2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15NickellotharmeyeriteCaNi2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15SchneebergiteBiCo2(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15NickelschneebergiteBiNi2(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15YancowinnaitePbCuAl(AsO4)2OH · H2O Tric. 1 : P1
8.CG.15NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2(H2O,OH)2Mon. 2/m : B2/m
8.CG.15MagnesiofluckiteCaMg(AsO3OH)2(H2O)2Tric. 1 : P1
8.CG.20GartrellitePbCuFe3+(AsO4)2(OH) · H2OTric. 1 : P1
8.CG.20HelmutwinkleritePbZn2(AsO4)2 · 2H2OTric. 1 : P1
8.CG.20ZincgartrellitePbZn2(AsO4)2(H2O,OH)2Tric. 1 : P1
8.CG.20RappolditePbCo2(AsO4)2 · 2H2OTric. 1 : P1
8.CG.20PhosphogartrellitePbCuFe3+(PO4)2(OH,H2O)2Tric. 1 : P1
8.CG.20LukrahniteCaCuFe3+(AsO4)2(OH,H2O)2Tric. 1 : P1
8.CG.25Pottsite(Pb3xBi4-2x)(VO4)4 · H2O (0.8 < x < 1.0)Tet. 4/m : I41/a
8.CG.25Armellinoite-(Ce)Ca4Ce4+(AsO4)4 · H2OTet. 4/m : I41/a
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1
8.CG.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.

Fluorescence of CobalttsumcoriteHide

In UV light:
Not fluorescent.

Other InformationHide

Notes:
Soluble in warm dilute HCl.
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 CobalttsumcoriteHide

References for CobalttsumcoriteHide

Localities for CobalttsumcoriteHide

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 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.
Germany
 
  • Saxony
    • Erzgebirgskreis
      • Schneeberg
        • Neustädtel
Th. Witzke collection
      • Zschorlau
The Mineralogical Record, 33, 351.
Krause, W., Bernhardt, H.-J., Effenberger, H., Martin, M. (2001) Cobalttsumcorite and nickellotharmeyerite, two new minerals from Schneeberg, Germany: description and crystal structure. Neues Jahrbuch für Mineralogie - Monatshefte, 2001. 558-576
(2005) Lapis, 30(7/8), 68.
Namibia
 
  • Oshikoto Region
    • Tsumeb
Bowell, R.J & Mocke, H. 2018. Minerals new to Tsumeb. Communications of the
Geological Survey of Namibia, 19, 20-46
Portugal
 
  • Beja
    • Odemira
      • São Luís
Pedro Alves collection and analytical data.
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