Grandreefite Mineral Data

Grandreefite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


John Betts Fine Minerals

[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.

Dakota Matrix

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
 

Search for Grandreefite Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.
  

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 - PrismaticH-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),
Click Here for Large Grandreefite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Kampf A R , American Mineralogist , 76 (1991) p.278-282, Grandreefite, Pb2F2SO4: Crystal structure and relationship to the lanthanide, oxide sulfates, Ln2O2SO4

 

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: 12.01.02.01 (12)Compound Halides
  (12.01)with miscellaneous anions
  (12.01.02)Dana Group
 
12.01.02.01 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
15 - WWW-MINCRYST

Search for Grandreefite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Grandreefite :

B and L Fine Minerals
Dakota Matrix Minerals
Dan & Diana Weinrich Mineral Auctions
Excalibur Mineral Corp.
Exceptional Minerals
John Betts Fine Minerals
Mineral News
Mineral of the Month Club
NY/NJ Gem & Mineral Show
TIMA Mineral Analyzer
Weinrich Minerals, Inc.
Wright's Rock Shop

Ask about Grandreefite 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 Espaņol

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

Grandreefite

Pb2SO4F2
Dana No: 12.01.02.01 Strunz No: 07.BD.45
Locality:

 

Notes: