Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Cobalttsumcorite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Roter Berg District, Schneeberg District, Erzgebirge, Saxony, Germany
© Stephan Wolfsried

Show Cobalttsumcorite Photos (4)



Formula:
Pb(Co,Fe
3+
 
,Ni)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
System:MonoclinicColour:Brown to red-brown
Lustre:AdamantineHardness:4½
Member of:Tsumcorite Group
Name:For the relationship to Tsumcorite


Tsumcorite Group.

See also Unnamed (Ni-analogue of Cobalttsumcorite).

Classification of Cobalttsumcorite

IMA status:Approved 1999
Strunz 8th edition ID:7/C.31-36
Nickel-Strunz 10th (pending) edition ID: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
mindat.org URL:http://www.mindat.org/min-7095.html
Please feel free to link to this page.

Type Occurrence of Cobalttsumcorite

Type Locality:Roter Berg District, Schneeberg District, Erzgebirge, Saxony, Germany
General Appearance of Type Material:rosettes to 2 mm across, consisting of tabular crystals to 0.3 mm
Geological Setting of type material:From the oxidation zone of the deposit
Associated Minerals at type locality:
PlumbogummiteMawbyiteGalenaCobaltlotharmeyeriteArseniosiderite

Physical Properties of Cobalttsumcorite

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

Crystallography of Cobalttsumcorite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 9.097Å, b = 6.313Å, c = 7.555Å
β = 115.08°
Ratio:a:b:c = 1.441 : 1 : 1.197
Unit Cell Volume:V 393 ų
Z:2
Morphology:{_201} dominant, {001} and {_111}
Twinning:None mentioned.
X-Ray Powder Diffraction:
d-spacingIntensity
4.656 (87)
4.462 (96)
3.243 (100)
3.010 (58)
2.868 (50)
2.733 (47)
2.538 (40)

Optical Data of Cobalttsumcorite

Type:Biaxial (+)
RI values: nα = 1.920 nβ = 1.940 nγ = 1.980
Maximum Birefringence:δ = 0.060

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:none
Pleochroism:Strong
Comments:X=Light Brown
Y=Red-Brown
Z=Yellow

X^C = 15º in acute angle β
Y=b
Z^a = 40º in obtuse angle β

Chemical Properties of Cobalttsumcorite

Formula:
Pb(Co,Fe
3+
 
,Ni)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Essential elements:As, Co, H, O, Pb
All elements listed in formula:As, Co, Fe, H, Ni, O, Pb
Analytical Data:NiO (5.20)
CoO (9.10)
ZnO (0.52)
PbO (34.23)
Al2O3 (0.29)
Fe2O3 (8.47)
P2O5 (0.06)
As2O5 (36.49)
SO3 (0.09)
H2O (4.65)
average values out of seven sets of electron microprobe data
Empirical Formula:
Pb
 
0.97
(Co
 
0.77
Fe
3+
0.67
Ni
 
0.44
Zn
 
0.44
Al
 
0.04
)
 
Σ1.96-
[(AsO
 
4
)
 
2.02
(SO
 
4
)
 
0.01
(PO
 
4
)
 
0.01
]
 
Σ2.04
[(H
 
2
O)
 
1.41
(OH)
 
0.46
]
 
Σ1.87

Relationship of Cobalttsumcorite to other Species

Member of:Tsumcorite Group
Other Members of Group:

- +
Cabalzarite
Ca(Mg,Al,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
Cobaltlotharmeyerite
Ca(Co,Fe
3+
 
,Ni)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Ferrilotharmeyerite
Ca(Fe
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
Gartrellite
Pb(Cu,Fe
3+
 
,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Helmutwinklerite
Pb(Zn,Cu)
 
2
(AsO
 
4
)
 
2
 · 2H
 
2
O
Krettnichite
(Pb,Sr)(Mn
3+
 
,Co)
 
2
(VO
 
4
)
 
2
 · 2(OH,H
 
2
O)
Lotharmeyerite
Ca(Zn,Mn
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Lukrahnite
Ca(Cu,Zn)(Fe
3+
 
,Zn)(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Mawbyite
Pb(Fe
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
Mounanaite
PbFe
3+
2
(VO
 
4
)
 
2
 · 2(OH,F)
Natrochalcite
NaCu
 
2
(SO
 
4
)
 
2
(OH) · 2H
 
2
O
Nickelschneebergite
(Bi
3+
 
,Ca)(Ni,Co,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
Phosphogartrellite
Pb(Cu,Fe
3+
 
)
 
2
(PO
 
4
,AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Rappoldite
Pb(Co,Ni,Zn)
 
2
(AsO
 
4
)
 
2
 · 2H
 
2
O
Schneebergite
(Bi
3+
 
,Ca)(Co,Ni,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
Thometzekite
Pb(Cu,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Tsumcorite
Pb(Zn,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Unnamed (Ni-analogue of Cobalttsumcorite)
Pb(Ni,Co)
 
2
(AsO
 
4
)
 
2
 · 2H
 
2
O
Yancowinnaite
PbCuAl(AsO
 
4
)
 
2
OH · H
 
2
O
Zincgartrellite
Pb(Zn,Fe
3+
 
,Cu)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
Related Minerals - Nickel-Strunz Grouping):

- +
8.CG.05Cassidyite
Ca
 
2
(Ni
2+
 
,Mg)(PO
 
4
)
 
2
 · 2H
 
2
O
8.CG.05Collinsite
Ca
 
2
(Mg,Fe
2+
 
)(PO
 
4
)
 
2
 · 2H
 
2
O
8.CG.05Fairfieldite
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)(PO
 
4
)
 
2
 · 2H
 
2
O
8.CG.05Gaitite
Ca
 
2
Zn(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.05Messelite
Ca
 
2
(Fe
2+
 
,Mn
2+
 
)(PO
 
4
)
 
2
 · 2H
 
2
O
8.CG.05Parabrandtite
Ca
 
2
Mn
2+
 
(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.05Talmessite
Ca
 
2
Mg(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.05Hillite
Ca
 
2
(Zn,Mg)(PO
 
4
)
 
2
 · 2 H
 
2
O
8.CG.10Brandtite
Ca
 
2
(Mn
2+
 
,Mg)(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.10Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.10Wendwilsonite
Ca
 
2
(Mg,Co
2+
 
)(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.10Zincroselite
Ca
 
2
Zn(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.10Rruffite
Ca
 
2
Cu(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.15Ferrilotharmeyerite
Ca(Fe
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
8.CG.15Lotharmeyerite
Ca(Zn,Mn
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.15Mawbyite
Pb(Fe
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
8.CG.15Mounanaite
PbFe
3+
2
(VO
 
4
)
 
2
 · 2(OH,F)
8.CG.15Thometzekite
Pb(Cu,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.15Tsumcorite
Pb(Zn,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.15Cobaltlotharmeyerite
Ca(Co,Fe
3+
 
,Ni)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.15Cabalzarite
Ca(Mg,Al,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
8.CG.15Krettnichite
(Pb,Sr)(Mn
3+
 
,Co)
 
2
(VO
 
4
)
 
2
 · 2(OH,H
 
2
O)
8.CG.15Nickellotharmeyerite
Ca(Ni,Fe
3+
 
,Co)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.15Manganlotharmeyerite
Ca(Mn
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
8.CG.15Schneebergite
(Bi
3+
 
,Ca)(Co,Ni,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
8.CG.15Nickelschneebergite
(Bi
3+
 
,Ca)(Ni,Co,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
 · 2(OH,H
 
2
O)
8.CG.20Gartrellite
Pb(Cu,Fe
3+
 
,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.20Helmutwinklerite
Pb(Zn,Cu)
 
2
(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.20Zincgartrellite
Pb(Zn,Fe
3+
 
,Cu)
 
2
(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.20Rappoldite
Pb(Co,Ni,Zn)
 
2
(AsO
 
4
)
 
2
 · 2H
 
2
O
8.CG.20Phosphogartrellite
Pb(Cu,Fe
3+
 
)
 
2
(PO
 
4
,AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.20Lukrahnite
Ca(Cu,Zn)(Fe
3+
 
,Zn)(AsO
 
4
)
 
2
 · 2(H
 
2
O,OH)
8.CG.25Pottsite
HPbBi(VO
 
4
)
 
2
 · 2H
 
2
O
8.CG.35Nickeltalmessite
Ca
 
2
Ni(AsO
 
4
)
 
2
 · 2H
 
2
O

Other Names for Cobalttsumcorite

Synonyms:
IMA1999-029
Other Languages:
German:Cobalttsumcorit
Kobalttsumcorit
Russian:Кобальтцумкорит
Spanish:Cobalttsumcorita

Other Information

Fluorescence in UV light:None
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cobalttsumcorite

Reference List:

- +
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.

Lapis 30(7/8):68 (2005).

Internet Links for Cobalttsumcorite

Search Engines:
  • Look for Cobalttsumcorite on Google
  • Look for Cobalttsumcorite images on Google
    • External Links:
  • Look for Cobalttsumcorite on Webmineral
  • Look for Cobalttsumcorite on Athena Mineralogy [Link dead]
  • Look for Cobalttsumcorite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
  • Buy from David K Joyce minerals
  • Fine Minerals from Weinrich Minerals, Inc.
  • SpiriferMinerals.com - high quality low prices
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Buy RARE Minerals from Rocks of Africa
  • Edwards Minerals - Fine Specimens
  • Top quality minerals from Kristalle of California
  • Rare and Unusual minerals at Mineralogical Research Company
  • Find Cobalttsumcorite on www.crystalclassics.co.uk
  • By minerals from YourMineralCollection
  • webminerals
  • The Arkenstone - Fine Minerals
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Cobalttsumcorite

    Hide Locality List
    (TL) indicates type locality. ? 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.
    Germany
     
    • Saxony
      • Erzgebirge
        • Schneeberg District
          • Neustädtel
    		Th. Witzke collection
    MinRec 33:351; Lapis 30(7/8):68 (2005)
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: 16th Jan 2012 11:05:38
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds