Gabrielsonite Mineral Data

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

General Gabrielsonite Information

Chemical Formula:

PbFe++(AsO4)(OH)

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

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

Gabrielsonite Image

Images:

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

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 - PyramidalH-M Symbol (mm2) Space Group: P 2₁m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.074(1), 3.192(1), 2.706(0.4),

Physical Properties of Gabrielsonite

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

Optical Properties of Gabrielsonite

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

Electron Density:

Bulk Density (Electron Density)=5.97 gm/cc
note: Specific Gravity of Gabrielsonite =6.87 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_{Gabrielsonite}= 891.61 barns/electron
U=PE_{Gabrielsonite} x rElectron Density=5,321.63 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gabrielsonite is Not Radioactive

Gabrielsonite Classification

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

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

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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Gabrielsonite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Gabrielsonite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Diamond Dan Publications

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Gabrielsonite Mineral Data :

Ask about Gabrielsonite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Gabrielsonite

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

Notes: