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Gabrielsonite Mineral Data

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General Gabrielsonite Information

Help on Chemical  Formula: Chemical Formula: PbFe++(AsO4)(OH)
Help on Composition: Composition: Molecular Weight = 418.97 gm
   Iron      13.33 %  Fe   17.15 % FeO
   Arsenic   17.88 %  As   27.43 % As2O5
   Hydrogen   0.24 %  H     2.15 % H2O
   Lead      49.45 %  Pb   53.27 % PbO
   Oxygen    19.09 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbFe2+(AsO4)(OH)
Help on Environment: Environment: Secondary arsenate mineral.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Hindenburg stope at Langban, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Olof Erik Gabrielson (1912-), mineralogist, Swedish Natural History Museum, Stockholm, Sweden.
Help on Name Pronunciation: Name Pronunciation: Gabrielsonite + Pronunciation Say GABRIELSONITE
 

Gabrielsonite Image

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  Gabrielsonite

Comments: Jet black, lustrous crystal grain, showing no faces, fractured to about 0.75mm with white pectolite-hematite matrix.
Location: Langban, Varmland, Sweden. Scale: 2.5 x 1.5 x 1.5cm.
© Tom Loomis / Dakota Matrix

Gabrielsonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9118:1:0.6937
Help on Cell Dimensions: Cell Dimensions: a = 7.86, b = 8.62, c = 5.98, Z = 4; V = 405.16 Den(Calc)= 6.87
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P 21m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.074(1), 3.192(1), 2.706(0.4),
 

Physical Properties of Gabrielsonite

Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish brown, Black.
Help on Density: Density: 6.67
Help on Diaphaneity: Diaphaneity: Transparent to Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Adamantine
Help on Streak: Streak: light brown
 

Optical Properties of Gabrielsonite

Help on Optical Data: Optical Data: NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.1548) where Ncalc=Dcalc*KC+1
NCalc= 2.03 - from Gladstone-Dale relationship (KC = 0.1548) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Gabrielsonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.97 gm/cc
note: Specific Gravity of Gabrielsonite =6.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PEGabrielsonite = 891.61 barns/electron
U=PEGabrielsonite x rElectron Density=5,321.63 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gabrielsonite is Not Radioactive
 

Gabrielsonite Classification

Help on  Dana Class: Dana Class: 41.05.01.05 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.01)Adelite Group
 
41.05.01.01 Adelite CaMg(AsO4)(OH) P 212121 2 2 2
 
41.05.01.02 Conichalcite CaCu(AsO4)(OH) P 212121 2 2 2
 
41.05.01.03 Austinite CaZn(AsO4)(OH) P 212121 2 2 2
 
41.05.01.04 Duftite-beta? PbCu(AsO4)(OH) P 212121 2 2 2
 
41.05.01.05 Gabrielsonite PbFe(AsO4)(OH) P 21m mm2
 
41.05.01.06 Tangeite CaCu(VO4)(OH) P 212121 2 2 2
 
41.05.01.07 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 212121 2 2 2
 
41.05.01.08 Cobaltaustinite CaCo(AsO4)(OH) P 212121 2 2 2
 
41.05.01.09 Arsendescloizite PbZn(AsO4)(OH) P 212121 2 2 2
 
41.05.01.10 Gottlobite! CaMg(VO4,AsO4)(OH) P 212121 2 2 2
Help on  Strunz Class: Strunz Class: 08.BH.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
 
08.BH.35 Austinite CaZn(AsO4)(OH) P 212121 2 2 2
 
08.BH.35 Adelite CaMg(AsO4)(OH) P 212121 2 2 2
 
08.BH.35 Arsendescloizite PbZn(AsO4)(OH) P 212121 2 2 2
 
08.BH.35 Duftite-alpha PbCu(AsO4)(OH) P 212121 2 2 2
 
08.BH.35 Duftite-beta? PbCu(AsO4)(OH) P 212121 2 2 2
 
08.BH.35 Cobaltaustinite CaCo(AsO4)(OH) P 212121 2 2 2
 
08.BH.35 Conichalcite CaCu(AsO4)(OH) P 212121 2 2 2
 
08.BH.35 Gabrielsonite PbFe(AsO4)(OH) P 21m mm2
 
08.BH.35 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 212121 2 2 2
 
08.BH.35 Tangeite CaCu(VO4)(OH) P 212121 2 2 2
 
08.BH.35 Gottlobite! CaMg(VO4,AsO4)(OH) P 212121 2 2 2
 

Other Gabrielsonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Gabrielsonite :
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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Gabrielsonite

PbFe++(AsO4)(OH)
Dana No: 41.05.01.05 Strunz No: 08.BH.35
Locality:

 

Notes:

 

 
   
 


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