Cobalttsumcorite Mineral Data

Advertisment

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

Mineral, Fossil, Jewelry, and Lapidary Dealers - Expand your Sales by using Tucson Mall Pop-up Shops

General Cobalttsumcorite Information

Chemical Formula:

Pb(Co,Fe)2(AsO4)2(OH,H2O)2

Composition:

Molecular Weight = 607.66 gm

Iron 6.43 % Fe 8.28 % FeO

Cobalt 7.76 % Co 10.92 % Co₂O₃

Nickel 3.86 % Ni 4.92 % NiO

Arsenic 24.66 % As 37.82 % As₂O₅

Hydrogen 0.53 % H 4.74 % H₂O

Lead 30.69 % Pb 33.06 % PbO

Oxygen 26.07 % O

______ ______

100.00 % 99.74 % = TOTAL OXIDE

Empirical Formula:

Pb_0.9Co_0.8Fe²⁺_0.7Ni_0.4(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

Cobalttsumcorite Image

Images:

Cobalttsumcorite

Comments: Brown crystals of cobalttsumcorite.
Location: Rappold Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Cobalttsumcorite Crystallography

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 - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Krause W , Bernhardt H J , Effenberger H , Martin M , Neues Jahrbuch fur Mineralogie, Monatshefte , 2001 (2001) p.588-576, Cobalttsumcorite and nickellotharmeyerite, two new minerals from, Schneeberg, Germany: description and crystal structure, Locality: Schneeberg, Germany

Physical Properties of Cobalttsumcorite

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

Optical Properties of Cobalttsumcorite

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

Calculated Properties of Cobalttsumcorite

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:

PE_{Cobalttsumcorite}= 548.25 barns/electron
U=PE_{Cobalttsumcorite} x rElectron Density=2,533.93 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cobalttsumcorite is Not Radioactive

Cobalttsumcorite Classification

Dana Class:

40.02.09.08 (40)Hydrated Phosphates, etc

(40.02)where A++ (B++)2 (XO4) · x(H2O)

(40.02.09)Helmutwinklerite Subgroup

40.02.09.01 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m

40.02.09.02 Helmutwinklerite PbZn2(AsO4)2•2(H2O) P1 1

40.02.09.03 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m

40.02.09.04 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

40.02.09.05 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2•2(H2O) P1 1

40.02.09.06 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

40.02.09.07 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

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

08.C - Phosphates without Additional Anions, with H2O

08.CG -With large and medium-sized cations, RO4:H2O = 1:1

08.CG.15 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m

08.CG.15 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

08.CG.15 Mounanaite PbFe2(VO4)2(OH)2 P1 1

08.CG.15 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m

08.CG.15 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m

08.CG.15 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m

08.CG.15 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

Other Cobalttsumcorite Information

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

Search for Cobalttsumcorite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Cobalttsumcorite :

Dakota Matrix Minerals Google Search for Cobalttsumcorite
John Betts Fine Minerals Search for Cobalttsumcorite
McDougall Minerals Google Search for Cobalttsumcorite
Rock and Mineral Shows Google Search for Cobalttsumcorite
Weinrich Minerals, Inc. Google Search for Cobalttsumcorite

Ask about Cobalttsumcorite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: