Gallobeudantite Mineral Data

Gallobeudantite Mineral Data
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General Gallobeudantite Information

Help on Chemical Formula: Chemical Formula: PbGa3[(AsO4),(SO4)]2(OH)6
Help on Composition: Composition: Molecular Weight = 718.80 gm
   Aluminum   2.25 %  Al    4.26 % Al2O3
   Zinc       0.91 %  Zn    1.13 % ZnO
   Gallium   14.55 %  Ga   19.56 % Ga2O3
   Iron       6.22 %  Fe    8.89 % Fe2O3
   Arsenic   11.47 %  As   17.59 % As2O5
   Hydrogen   0.83 %  H     7.39 % H2O
   Lead      28.83 %  Pb   31.05 % PbO
   Sulfur     4.01 %  S    10.02 % SO3
   Oxygen    30.94 %  O
            ______        ______ 
            100.00 %       99.89 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbGa1.5Fe3+0.8Al0.6Zn0.1(AsO4)1.1(SO4)0.9(OH)5.9
Help on Environment: Environment: A secondary mineral in vugs of oxidized ore.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the relationship to beudantite and the gallium content.
Help on Name Pronunciation: Name Pronunciation: Gallobeudantite + Pronunciation Say GALLOBEUDANTITE
Help on Synonym: Synonym: IMA1994-021
 

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Gallobeudantite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.35709
Help on Cell Dimensions: Cell Dimensions: a = 7.225, c = 17.03, Z = 3; V = 769.88 Den(Calc)= 4.65
Help on Crystal System: Crystal System: Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.038(1), 5.85(0.9), 3.59(0.4),
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Jambor J L , Owens D R , Grice J D , Feinglos M N , The Canadian Mineralogist , 34 (1996) p.1305-1315, Gallobeudantite, PbGa3[(AsO4),(SO4)]2(OH)6, a new mineral species from Tsumeb,, Namibia, and associated new gallium analogues of the alunite - jarosite family, Locality: Tsumeb, Namibia

 

Physical Properties of Gallobeudantite

Help on Cleavage: Cleavage: {001} Indistinct
Help on Color: Color: Pale yellow, Slightly greenish yellow, Cream.
Help on Density: Density: 4.58
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: pale yellowish white
 

Optical Properties of Gallobeudantite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.105 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.118 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1627,KPDmeas= 0.1652,KC= 0.1845
Ncalc = 1.85 - 1.86
Help on Optical Data: Optical Data: Uniaxial (-), e=1.75, w=1.763, bire=0.0130.
 

Calculated Properties of Gallobeudantite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Gallobeudantite =4.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEGallobeudantite = 504.29 barns/electron
U=PEGallobeudantite x rElectron Density=2,107.21 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gallobeudantite is Not Radioactive
 

Gallobeudantite Classification
Help on Dana Class: Dana Class: 43.04.01.10 (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.01)Beudantite Group
 
43.04.01.01 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.02 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
43.04.01.03 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.04 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
43.04.01.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.06 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.07 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.08 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.09 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
43.04.01.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
Help on Strunz Class: Strunz Class: 08.BL.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.05 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
08.BL.05 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
 
08.BL.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
08.BL.05 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
08.BL.05 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 

Other Gallobeudantite Information
Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.82,p1039,1997) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Gallobeudantite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - Handbook of Mineralogy (MinSocAm)
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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Gallobeudantite

PbGa3[(AsO4),(SO4)]2(OH)6
Dana No: 43.04.01.10 Strunz No: 08.BL.05
Locality:

 

Notes: