Mineralogy Database

Laurelite Mineral Data

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General Laurelite Information

Help on Chemical  Formula: Chemical Formula: Pb7F12Cl2
Help on Composition: Composition: Molecular Weight = 1,749.29 gm
   Lead      82.91 %  Pb   89.32 % PbO
   Chlorine   4.05 %  Cl    4.05 % Cl
               -   %   Cl   -0.91 % -O=Cl2   
   Fluorine  13.03 %  F    13.03 % F
               -   %   F    -5.49 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb7F12Cl2
Help on Environment: Environment: In a vug isolated from acidic sulfate-rich solutions in the oxidized zone of a low-temperature Pb-Cu-Ag deposit.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Grand Reef, Mine, Aravaipa District, Laural Canyon, Graham County, Arizona USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Laurelite + Pronunciation Say LAURELITE
Help on Synonym: Synonym: ICSD 82415
  PDF 45-1457

Laurelite Image

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Comments: Snow white acicular crystals of laurelite.
Location: Grand Reef mine, Graham Co., Arizona, United States. Scale: Crystal size 7 mm.
© Tom Loomis / Dakota Matrix

Laurelite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.38807
Help on Cell Dimensions: Cell Dimensions: a = 10.267, c = 3.9844, Z = 1; V = 363.73 Den(Calc)= 7.99
Help on Crystal System: Crystal System: Hexagonal - Trigonal Dipyramidal H-M Symbol (6) Space Group: P 6
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.33(1), 1.934(0.6), 1.282(0.4),1.709(0.4), 2.949(0.4), 3.125(0.4), 2.09(0.35),

Physical Properties of Laurelite

Help on Cleavage: Cleavage: {0001} Imperfect
Help on Color: Color: Colorless.
Help on Density: Density: 7.65
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Laurelite

Help on Optical Data: Optical Data: Uniaxial (+), w=1.903, e=1.946, bire=0.0430.

Calculated Properties of Laurelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.54 gm/cc
note: Specific Gravity of Laurelite =7.99 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.18
Boson Index = 0.82
Help on Photoelectric: Photoelectric: PELaurelite =1,555.20 barns/electron
U=PELaurelite x rElectron Density=10172.21 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Laurelite is Not Radioactive

Laurelite Classification

Help on  Dana Class: Dana Class: (09)Anhydrous and Hydrated Halides
  (09.02)where A (X)2
  (09.02.10)Dana Group Laurelite Pb7F12Cl2 P 6 6
Help on  Strunz Class: Strunz Class: 03.DC.20 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DC -With Pb (As,Sb,Bi), without Cu
03.DC.20 Laurelite Pb7F12Cl2 P 6 6

Other Laurelite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Laurelite :
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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Dana No: Strunz No: 03.DC.20





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