Mineralogy Database

Grandreefite Mineral Data

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General Grandreefite Information

Help on Chemical  Formula: Chemical Formula: Pb2SO4F2
Help on Composition: Composition: Molecular Weight = 548.46 gm
   Lead      75.56 %  Pb   81.39 % PbO
   Sulfur     5.85 %  S    14.60 % SO3
   Oxygen    11.67 %  O
   Fluorine   6.93 %  F     6.93 % F
               -   %   F    -2.92 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2(SO4)F2
Help on Environment: Environment: Secondary mineral in isolated vugs in the oxidized portions of a breccia-hosted hydrothermal Cu-Pb-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 for the locality.
Help on Name Pronunciation: Name Pronunciation: Grandreefite + Pronunciation Say GRANDREEFITE
Help on Synonym: Synonym: ICSD 69697
  PDF 45-1455

Grandreefite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.9511:1:3.2062
Help on Cell Dimensions: Cell Dimensions: a = 8.667, b = 4.4419, c = 14.242, Z = 4; beta = 107.418° V = 523.15 Den(Calc)= 6.96
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.159(1), 3.116(0.9), 3.084(0.8),

Physical Properties of Grandreefite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 7.1
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 Grandreefite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.097 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.079 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1265,KPDmeas= 0.124,KC= 0.1373
Ncalc = 1.96 - 1.98
Help on Optical Data: Optical Data: Biaxial (+), a=1.872, b=1.873, g=1.897, bire=0.0250, 2V(Calc)=24, 2V(Meas)=23.

Calculated Properties of Grandreefite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.84 gm/cc
note: Specific Gravity of Grandreefite =6.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.16
Boson Index = 0.84
Help on Photoelectric: Photoelectric: PEGrandreefite =1,383.38 barns/electron
U=PEGrandreefite x rElectron Density=8,075.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Grandreefite is Not Radioactive

Grandreefite Classification

Help on  Dana Class: Dana Class: (12)Compound Halides
  (12.01)with miscellaneous anions
  (12.01.02)Dana Group Grandreefite Pb2SO4F2 A2/a 2/m
Help on  Strunz Class: Strunz Class: 07.BD.45 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BD -With only large cations
07.BD.45 Grandreefite Pb2SO4F2 A2/a 2/m

Other Grandreefite 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 Grandreefite :
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.45





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