Schwartzembergite Mineral Data

Schwartzembergite Mineral Data
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General Schwartzembergite Information

Help on Chemical Formula: Chemical Formula: Pb++6(IO3)2O3Cl4
Help on Composition: Composition: Molecular Weight = 1,782.81 gm
   Lead      69.73 %  Pb   75.12 % PbO
   Iodine    14.24 %  I    18.72 % I2O5
   Chlorine   7.95 %  Cl    7.95 % Cl
               -   %   Cl   -1.79 % -O=Cl2   
   Oxygen     8.08 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb6(IO3)2O3Cl4
Help on Environment: Environment: Oxidized lead ores in areas which host caliche nitrate deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1864
Help on Locality: Locality: Cerro Grodo and various other points in northern Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for H. Schwartzemberg, assayer, Copiapo, Chile.
Help on Name Pronunciation: Name Pronunciation: Schwartzembergite + Pronunciation Say SCHWARTZEMBERGITE
 

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Schwartzembergite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.23529
Help on Cell Dimensions: Cell Dimensions: a = 5.61, c = 12.54, Z = 1; V = 394.66 Den(Calc)= 7.50
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
Click Here for Large Schwartzembergite Structure Window Crystal Structure:

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Welch M D , Hawthorne F C , Cooper M A , Kyser T K , The Canadian Mineralogist , 39 (2001) p.785-795, Trivalent iodine in the crystal structure of schwartzembergite, Pb5IO6H2Cl3

 

Physical Properties of Schwartzembergite

Help on Cleavage: Cleavage: {001} Distinct
Help on Color: Color: Yellow brown, Light yellow, Reddish brown.
Help on Density: Density: 7.39
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Adamantine
Help on Streak: Streak: light yellow
 

Optical Properties of Schwartzembergite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.106 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.089 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.176,KPDmeas= 0.1786,KC= 0.1616
Ncalc = 2.19 - 2.21
Help on Optical Data: Optical Data: Biaxial (-), a=2.25, b=2.35, g=2.36, bire=0.1100, 2V(Calc)=32, 2V(Meas)=small. Dispersion very weak.
 

Calculated Properties of Schwartzembergite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.21 gm/cc
note: Specific Gravity of Schwartzembergite =7.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PESchwartzembergite =1,351.49 barns/electron
U=PESchwartzembergite x rElectron Density=8,391.79 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schwartzembergite is Not Radioactive
 

Schwartzembergite Classification
Help on Dana Class: Dana Class: 22.01.03.01 (22)Iodates - Hydroxyl or Halogen
  (22.01)with miscellaneous formulae
  (22.01.03)Dana Group
 
22.01.03.01 Schwartzembergite Pb6(IO3)2O3Cl4 I 4/mmm 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: 04.KB.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.K - Iodates
  04.KB -Iodates with additional anions, without H2O
 
04.KB.10 Schwartzembergite Pb6(IO3)2O3Cl4 I 4/mmm 4/m 2/m 2/m
 

Other Schwartzembergite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(AmMin, Vol 87, p 358) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Schwartzembergite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Schwartzembergite

Pb++6(IO3)2O3Cl4
Dana No: 22.01.03.01 Strunz No: 04.KB.10
Locality:

 

Notes: