Mineralogy Database

Pseudograndreefite Mineral Data

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General Pseudograndreefite Information

Help on Chemical  Formula: Chemical Formula: Pb6SO4F1O
Help on Composition: Composition: Molecular Weight = 1,529.25 gm
   Lead      81.29 %  Pb   87.57 % PbO
   Sulfur     2.10 %  S     5.24 % SO3
   Oxygen     4.18 %  O
   Fluorine  12.42 %  F    12.42 % F
               -   %   F    -5.23 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb6(SO4)F10
Help on Environment: Environment: 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, about six km northeast of Klondyke, Aravaipa district, Graham Co., Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for false, and its relation to grandreefite.
Help on Name Pronunciation: Name Pronunciation: Pseudograndreefite + Pronunciation Say PSEUDOGRANDREEFITE

Pseudograndreefite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4351:1:0.4338
Help on Cell Dimensions: Cell Dimensions: a = 8.5182, b = 19.5736, c = 8.4926, Z = 4; V = 1,415.99 Den(Calc)= 7.17
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: F 222
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.204(1), 1.779(0.7), 2.999(0.3),

Physical Properties of Pseudograndreefite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 7
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Subadamantine
Help on Streak: Streak: white

Optical Properties of Pseudograndreefite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.058 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.121,KPDmeas= 0.1239,KC= 0.1316
Ncalc = 1.92 - 1.94
Help on Optical Data: Optical Data: Biaxial (+), a=1.864, b=1.865, g=1.873, bire=0.0090, 2V(Calc)=40, 2V(Meas)=30.

Calculated Properties of Pseudograndreefite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.77 gm/cc
note: Specific Gravity of Pseudograndreefite =7.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.17
Boson Index = 0.83
Help on Photoelectric: Photoelectric: PEPseudograndreefite =1,514.84 barns/electron
U=PEPseudograndreefite x rElectron Density=8,736.93 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pseudograndreefite is Not Radioactive

Pseudograndreefite Classification

Help on  Dana Class: Dana Class: (12)Compound Halides
  (12.01)with miscellaneous anions
  (12.01.03)Dana Group Pseudograndreefite Pb6SO4F1O F 222 2 2 2
Help on  Strunz Class: Strunz Class: 07.BD.65 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BD -With only large cations
07.BD.65 Pseudograndreefite Pb6SO4F1O F 222 2 2 2

Other Pseudograndreefite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.74,p927-933,1989) OPTIC PROP.(Am.Min.,Vol.74,p927-933,1989)
Help on See Also: See Also: Links to other databases for Pseudograndreefite :
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: 07.BD.65





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