Mineralogy Database

Tsumcorite Mineral Data

Search Webmineral :
  
Advertisment

General Tsumcorite Information

Help on Chemical  Formula: Chemical Formula: PbZnFe++(AsO4)2•(H2O)
Help on Composition: Composition: Molecular Weight = 624.29 gm
   Zinc      10.47 %  Zn   13.04 % ZnO
   Iron       8.95 %  Fe   11.51 % FeO
   Arsenic   24.00 %  As   36.82 % As2O5
   Hydrogen   0.32 %  H     2.89 % H2O
   Lead      33.19 %  Pb   35.75 % PbO
   Oxygen    23.07 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbZnFe2+(AsO4)2•(H2O)
Help on Environment: Environment: In the oxidized zone associated with other lead arsenates and carbonates. Forms a series with helmutwinklerite and thometzekite.
Help on IMA Status: IMA Status: Approved IMA 1971
Help on Locality: Locality: Tsumeb mine, Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the TSUMeb CORporation.
Help on Name Pronunciation: Name Pronunciation: Tsumcorite + Pronunciation Say TSUMCORITE
Help on Synonym: Synonym: ICSD 34763
  PDF 25-399
 

Tsumcorite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Tsumcorite

Comments: Yellow tsumcorite crystalline rosettes on matrix.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Tsumcorite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4434:1:1.1987
Help on Cell Dimensions: Cell Dimensions: a = 9.131, b = 6.326, c = 7.583, Z = 2; beta = 115.3° V = 396.00 Den(Calc)= 5.24
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.244(1), 2.863(0.9), 4.663(0.9),
 

Physical Properties of Tsumcorite

Help on Color: Color: Yellow brown, Reddish brown, Lemon.
Help on Density: Density: 5.2
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Streak: Streak: yellow
 

Optical Properties of Tsumcorite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.087 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.079 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1718,KPDmeas= 0.1731,KC= 0.1592
Ncalc = 1.83
Help on Optical Data: Optical Data: Biaxial (?), b=1.9, 2V(Meas)=90.
Help on Pleochroism (x): Pleochroism (x): yellow.
Help on Pleochroism (y): Pleochroism (y): greenish yellow.
 

Calculated Properties of Tsumcorite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.67 gm/cc
note: Specific Gravity of Tsumcorite =5.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PETsumcorite = 598.06 barns/electron
U=PETsumcorite x rElectron Density=2,791.04 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tsumcorite is Not Radioactive
 

Tsumcorite Classification

Help on  Dana Class: Dana Class: 40.02.09.01 (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
Help on  Strunz Class: 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 Tsumcorite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Tsumcorite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

Search for Tsumcorite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Tsumcorite :

Ask about Tsumcorite 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 Tsumcorite Specimen Label here :

Tsumcorite

PbZnFe++(AsO4)2•(H2O)
Dana No: 40.02.09.01 Strunz No: 08.CG.15
Locality:

 

Notes:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.