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Cobalttsumcorite Mineral Data
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General Cobalttsumcorite Information
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Chemical Formula: |
Pb(Co,Fe)2(AsO4)2(OH,H2O)2 |
Composition: |
Molecular Weight = 607.66 gm |
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Iron 6.43 % Fe 8.28 % FeO |
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Cobalt 7.76 % Co 10.92 % Co2O3 |
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Nickel 3.86 % Ni 4.92 % NiO |
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Arsenic 24.66 % As 37.82 % As2O5 |
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Hydrogen 0.53 % H 4.74 % H2O |
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Lead 30.69 % Pb 33.06 % PbO |
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Oxygen 26.07 % O |
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______ ______ |
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100.00 % 99.74 % = TOTAL OXIDE |
Empirical Formula: |
Pb0.9Co0.8Fe2+0.7Ni0.4(AsO4)2(OH)0.6(H2O)1.3 |
Environment: |
Secondary mineral found in dump material from an oxidation zone. |
IMA Status: |
Approved IMA 1999 (Dana # Added) |
Locality: |
"Am Roten Berg" mining area, 4.8 km SW of Schneeberg, Germany. Link to MinDat.org Location Data. |
Name Origin: |
Named for the chemical and structural relationship to tsumcorite |
Synonym: |
IMA1999-029 |
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Cobalttsumcorite Image |
Images:
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Cobalttsumcorite Crystallography
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Axial Ratios: |
a:b:c =1.4409:1:1.1967 |
Cell Dimensions: |
a = 9.097, b = 6.313, c = 7.555, Z = 2; beta = 115.08° V = 392.97 Den(Calc)= 5.14 |
Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.243(1)(112), 4.462(0.96)(201), 4.656(0.87)(111),3.01(0.58)(201), 2.868(0.5)(021), 2.733(0.47)(311), 2.55(0.4), |
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Physical Properties of Cobalttsumcorite
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Cleavage: |
{001} Good |
Color: |
Brown, Reddish brown. |
Diaphaneity: |
Transparent |
Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
Habit: |
Rosette - Bundled tabular aggregates resembling rose flower petals. |
Habit: |
Tabular - Form dimensions are thin in one direction. |
Hardness: |
4.5 - Between Fluorite and Apatite |
Luster: |
Subadamantine |
Streak: |
light brown |
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Optical Properties of Cobalttsumcorite
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Gladstone-Dale: |
CI calc= -0.015 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1842,KC= 0.1815 Ncalc = 1.93 |
Optical Data: |
Biaxial (+), a=1.92, b=1.94, g=1.98, bire=0.0600 |
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Calculated Properties of Cobalttsumcorite
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Electron Density: |
Bulk Density (Electron Density)=4.62 gm/cc note: Specific Gravity of Cobalttsumcorite =5.14 gm/cc. |
Fermion Index: |
Fermion Index = 0.06 Boson Index = 0.94 |
Photoelectric: |
PECobalttsumcorite = 548.25 barns/electron U=PECobalttsumcorite x rElectron Density=2,533.93 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cobalttsumcorite is Not Radioactive |
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Cobalttsumcorite Classification
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Dana Class: |
40.02.09.08 (40)Hydrated Phosphates, etc |
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(40.02)where A++ (B++)2 (XO4) � x(H2O) |
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(40.02.09)Helmutwinklerite Subgroup |
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40.02.09.01 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m |
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40.02.09.02 Helmutwinklerite PbZn2(AsO4)2•2(H2O) P1 1 |
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40.02.09.03 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m |
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40.02.09.04 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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40.02.09.05 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2•2(H2O) P1 1 |
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40.02.09.06 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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40.02.09.07 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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40.02.09.08 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
Strunz Class: |
08.CG.15 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.C - Phosphates without Additional Anions, with H2O |
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08.CG -With large and medium-sized cations, RO4:H2O = 1:1 |
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08.CG.15 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m |
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08.CG.15 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono |
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08.CG.15 Mounanaite PbFe2(VO4)2(OH)2 P1 1 |
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08.CG.15 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m |
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08.CG.15 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m |
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08.CG.15 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m |
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08.CG.15 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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Other Cobalttsumcorite Information
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References: |
NAME( AmMin, vol 87, p 996) PHYS. PROP.(AmMin, vol 87, p 996) OPTIC PROP.(AmMin, vol 87, p 996) |
See Also: |
Links to other databases for Cobalttsumcorite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Cobalttsumcorite Specimen Label here :
Cobalttsumcorite
Pb(Co,Fe)2(AsO4)2(OH,H2O)2
Dana No: 40.02.09.08 Strunz No: 08.CG.15
Locality:
Notes:
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