Mineralogy Database

Petterdite Mineral Data

Search Webmineral :
  
Advertisment

General Petterdite Information

Help on Chemical  Formula: Chemical Formula: PbCr+++2(CO3)2(OH)4•H2O
Help on Composition: Composition: Molecular Weight = 510.01 gm
   Strontium   1.72 %  Sr    2.03 % SrO
   Aluminum    2.12 %  Al    4.00 % Al2O3
   Chromium   15.29 %  Cr   22.35 % Cr2O3
   Hydrogen    1.11 %  H     9.89 % H2O
   Lead       40.63 %  Pb   43.76 % PbO
   Carbon      4.95 %  C    18.12 % CO2
   Oxygen     34.19 %  O
             ______        ______ 
             100.00 %      100.16 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbSr0.1Cr1.5Al0.4(CO3)2.1(OH)3.6•(H2O)
Help on Environment: Environment: Supergene product associated with crocoite and anglesite ores. Cr-analogue of dundasite.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Red Lead mine in the Zeehan-Dundas region of northwestern Tasmania. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for amateur mineralogist William Frederick Petterd (1849-1910), an amateur collector who published several significant catalogues on the mineralogy of Tasmania.
Help on Synonym: Synonym: IMA1999-034
 

Petterdite Image

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

  Petterdite

Comments: Pinkish-violet crystalline aggregate of petterdite on matrix.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

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

  Petterdite

Comments: Petterdite (Pe) forming a thin pink layer in grey-yellow anglesite (At) and cerussite, replacing galena (Gn), overgrown by red-yellow crocoite (Cr) and brown goethite (Gt). (CanMin, 38:1469).
Location: Red Lead mine, on the Zeehan–Dundas mining field in northwestern Tasmania, Australia.. Scale: Field of view: 15  9 mm.
© Canadian Mineralogist

Petterdite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5562:1:0.3545
Help on Cell Dimensions: Cell Dimensions: a = 9.079, b = 16.321, c = 5.786, Z = 4; V = 857.36 Den(Calc)= 3.95
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.937(1)(110), 3.633(0.7)(131), 4.686(0.5)(021,111),2.718(0.4)(022,060), 2.69(0.4)(241,301), 3.27(0.4)(221), 1.781(0.3), 2.101(0.3), 2.405(0.3),
 

Physical Properties of Petterdite

Help on Cleavage: Cleavage: {100} Fair, {010} Poor
Help on Color: Color: Pale gray, Pinkish violet.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: pale violet
 

Optical Properties of Petterdite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1981,KC= 0.2061
Ncalc = 1.81
Help on Optical Data: Optical Data: Biaxial (-), a=1.704, b=1.802, g=1.842, bire=0.1380
 

Calculated Properties of Petterdite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.60 gm/cc
note: Specific Gravity of Petterdite =3.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEPetterdite = 690.13 barns/electron
U=PEPetterdite x rElectron Density=2,484.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Petterdite is Not Radioactive
 

Petterdite Classification

Help on  Dana Class: Dana Class: 16b.02.01.04 (16b)Carbonates - Hydroxyl or Halogen
  (16b.02)where (A)m (B)n (XO3)p Zq � x(H2O), with (m+n):p=3:2
  (16b.02.01)Dundasite Group
 
16b.02.01.01 Dundasite PbAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.02 Dresserite BaAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.03 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.04 Petterdite! PbCr2(CO3)2(OH)4•H2O Pbnm 2/m 2/m 2/m
 
16b.02.01.05 Kochsandorite! CaAl2(CO3)2(OH)4•H2O P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.DB.10 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DB -With large and medium-sized cations
 
05.DB.10 Dresserite BaAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Dundasite PbAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Kochsandorite! CaAl2(CO3)2(OH)4•H2O P nma 2/m 2/m 2/m
 
05.DB.10 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Petterdite! PbCr2(CO3)2(OH)4•H2O Pbnm 2/m 2/m 2/m
 

Other Petterdite Information

Help on References: References: NAME( AmMin, Vol 86, p 1113) PHYS. PROP.(AmMin, Vol 86, p 1113) OPTIC PROP.(AmMin, Vol 86, p 1113)
Help on See Also: See Also: Links to other databases for Petterdite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Petterdite using:

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

Visit our Advertisers for Petterdite :

Ask about Petterdite 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 Espaol

Print or Cut-and-Paste your Petterdite Specimen Label here :

Petterdite

PbCr+++2(CO3)2(OH)4•H2O
Dana No: 16b.02.01.04 Strunz No: 05.DB.10
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.