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Gabrielsonite Mineral Data
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General Gabrielsonite Information
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 Chemical Formula: |
PbFe++(AsO4)(OH) |
| Composition: |
Molecular Weight = 418.97 gm |
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Iron 13.33 % Fe 17.15 % FeO |
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Arsenic 17.88 % As 27.43 % As2O5 |
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Hydrogen 0.24 % H 2.15 % H2O |
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Lead 49.45 % Pb 53.27 % PbO |
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Oxygen 19.09 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
PbFe2+(AsO4)(OH) |
| Environment: |
Secondary arsenate mineral. |
| IMA Status: |
Approved IMA 1967 |
| Locality: |
Hindenburg stope at Langban, Varmland, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Olof Erik Gabrielson (1912-), mineralogist, Swedish Natural History Museum, Stockholm, Sweden. |
| Name Pronunciation: |
Gabrielsonite + Pronunciation  |
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Gabrielsonite Image |
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Images:
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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 |
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Gabrielsonite Crystallography
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| Axial Ratios: |
a:b:c =0.9118:1:0.6937 |
| Cell Dimensions: |
a = 7.86, b = 8.62, c = 5.98, Z = 4; V = 405.16 Den(Calc)= 6.87 |
| Crystal System: |
Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P 21m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.074(1), 3.192(1), 2.706(0.4), |
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Physical Properties of Gabrielsonite
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| Cleavage: |
None |
| Color: |
Greenish brown, Black. |
| Density: |
6.67 |
| Diaphaneity: |
Transparent to Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Nodular - Tuberose forms having irregular protuberances over the surface. |
| Habit: |
Spherical - Spherical, rounded aggregates. |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Adamantine |
| Streak: |
light brown |
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Optical Properties of Gabrielsonite
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| 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
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Calculated Properties of Gabrielsonite
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| Electron Density: |
Bulk Density (Electron Density)=5.97 gm/cc
note: Specific Gravity of Gabrielsonite =6.87 gm/cc.
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| Fermion Index: |
Fermion Index = 0.11
Boson Index = 0.89 |
| Photoelectric: |
PEGabrielsonite = 891.61 barns/electron
U=PEGabrielsonite x rElectron Density=5,321.63 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gabrielsonite is Not Radioactive |
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Gabrielsonite Classification
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| Dana Class: |
41.05.01.05 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen |
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(41.05)where (A B)2 (XO4) Zq |
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(41.05.01)Adelite Group |
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41.05.01.01 Adelite CaMg(AsO4)(OH) P 212121 2 2 2 |
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41.05.01.02 Conichalcite CaCu(AsO4)(OH) P 212121 2 2 2 |
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41.05.01.03 Austinite CaZn(AsO4)(OH) P 212121 2 2 2 |
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41.05.01.04 Duftite-beta? PbCu(AsO4)(OH) P 212121 2 2 2 |
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41.05.01.05 Gabrielsonite PbFe(AsO4)(OH) P 21m mm2 |
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41.05.01.06 Tangeite CaCu(VO4)(OH) P 212121 2 2 2 |
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41.05.01.07 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 212121 2 2 2 |
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41.05.01.08 Cobaltaustinite CaCo(AsO4)(OH) P 212121 2 2 2 |
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41.05.01.09 Arsendescloizite PbZn(AsO4)(OH) P 212121 2 2 2 |
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41.05.01.10 Gottlobite! CaMg(VO4,AsO4)(OH) P 212121 2 2 2 |
| Strunz Class: |
08.BH.35 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.B - Phosphates, etc. with Additional Anions, without H2O |
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08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1 |
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08.BH.35 Austinite CaZn(AsO4)(OH) P 212121 2 2 2 |
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08.BH.35 Adelite CaMg(AsO4)(OH) P 212121 2 2 2 |
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08.BH.35 Arsendescloizite PbZn(AsO4)(OH) P 212121 2 2 2 |
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08.BH.35 Duftite-alpha PbCu(AsO4)(OH) P 212121 2 2 2 |
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08.BH.35 Duftite-beta? PbCu(AsO4)(OH) P 212121 2 2 2 |
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08.BH.35 Cobaltaustinite CaCo(AsO4)(OH) P 212121 2 2 2 |
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08.BH.35 Conichalcite CaCu(AsO4)(OH) P 212121 2 2 2 |
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08.BH.35 Gabrielsonite PbFe(AsO4)(OH) P 21m mm2 |
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08.BH.35 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 212121 2 2 2 |
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08.BH.35 Tangeite CaCu(VO4)(OH) P 212121 2 2 2 |
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08.BH.35 Gottlobite! CaMg(VO4,AsO4)(OH) P 212121 2 2 2 |
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Other Gabrielsonite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) |
| 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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