Caracolite Mineral Data

Caracolite Mineral Data
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General Caracolite Information

Help on Chemical Formula: Chemical Formula: Na3Pb2(SO4)3Cl
Help on Composition: Composition: Molecular Weight = 807.01 gm
   Sodium     8.55 %  Na   11.52 % Na2O
   Lead      51.35 %  Pb   55.31 % PbO
   Sulfur    11.92 %  S    29.76 % SO3
   Chlorine   4.39 %  Cl    4.39 % Cl
               -   %   Cl   -0.99 % -O=Cl2   
   Oxygen    23.79 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3Pb2(SO4)3Cl
Help on Environment: Environment: Secondary mineral in the oxidized zone of chlorine-rich lead deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1886
Help on Locality: Locality: Beatriz, Herminia, Santa Ana, and San Rafael mines, Sierra Gorda district, southwest of Calama, Antofagasta, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Caracoles, a town near the Beatriz mine, Chile.
 

Caracolite Image

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Caracolite

Comments: Nearly transparent colorless thin crystalline crust of caracolite.
Location: Iquique, Tarapaca, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Caracolite

Comments: Flat lying hexagonal prismatic crystals of caracolite on matrix.
Location: Challacollo Mine near Oficina Victoria, Chile. Scale: Crystal size 0.5 cm.
© John Veevaert

Caracolite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.7478:1:1.3739
Help on Cell Dimensions: Cell Dimensions: a = 19.62, b = 7.14, c = 9.81, Z = 4; beta = 120° V = 1,190.14 Den(Calc)= 4.50
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m
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Schneider W , Neues Jahrbuch fur Mineralogie, Monatshefte , 1969 (1969) p.58-64, Bestimmung einer uberstruktur am caracolit, Locality: Caracoles, Chile

 

Physical Properties of Caracolite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Blue, Colorless, Greenish gray, Gray.
Help on Density: Density: 5.1
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Caracolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.088 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1675,KPDmeas= 0.1478,KC= 0.162
Ncalc = 1.73 - 1.83
Help on Optical Data: Optical Data: Biaxial (-), a=1.743, b=1.754, g=1.764, bire=0.0210
 

Calculated Properties of Caracolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Caracolite =4.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PECaracolite = 889.74 barns/electron
U=PECaracolite x rElectron Density=3,552.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Caracolite is Not Radioactive
 

Caracolite Classification
Help on Dana Class: Dana Class: 30.03.02.01 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.03)with miscellaneous formulae
  (30.03.02)Dana Group
 
30.03.02.01 Caracolite Na3Pb2(SO4)3Cl P 21/m 2/m
Help on Strunz Class: Strunz Class: 07.BD.20 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BD -With only large cations
 
07.BD.20 Cesanite Na7Ca3(SO4)6(OH)•0.8(H2O) P 6 6
 
07.BD.20 Caracolite Na3Pb2(SO4)3Cl P 21/m 2/m
 

Other Caracolite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Caracolite :
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
15 - WWW-MINCRYST

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

Caracolite

Na3Pb2(SO4)3Cl
Dana No: 30.03.02.01 Strunz No: 07.BD.20
Locality:

 

Notes: