Mineralogy Database

Carobbiite Mineral Data

Search Webmineral :
  
Advertisment

General Carobbiite Information

Help on Chemical  Formula: Chemical Formula: KF
Help on Composition: Composition: Molecular Weight = 58.10 gm
   Potassium  67.30 %  K    81.07 % K2O
   Fluorine   32.70 %  F    32.70 % F
                -   %   F   -13.77 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KF
Help on Environment: Environment: Stalactites in cavities in lava.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Vesuvius, Campania, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Guido Carobbi (1900-1983), Italian geologist, Institute of Mineralogy and Geochemistry, University of Florence, Florence, Italy, who collected the first specimens.
Help on Synonym: Synonym: ICSD 64686
  PDF 36-1458
 

Carobbiite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.34, Z = 4; V = 152.27 Den(Calc)= 2.53
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.671(1), 1.89(0.63), 3.087(0.29),
 

Physical Properties of Carobbiite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Colorless.
Help on Density: Density: 2.524
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Carobbiite

Help on Optical Data: Optical Data: Isotropic, n=1.362.
 

Calculated Properties of Carobbiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.44 gm/cc
note: Specific Gravity of Carobbiite =2.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0000807584
Boson Index = 0.9999192416
Help on Photoelectric: Photoelectric: PECarobbiite = 7.03 barns/electron
U=PECarobbiite x relectron= 17.14 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 935.96 (Gamma Ray American Petroleum Institute Units)
Concentration of Carobbiite per GRapi unit =1,068.43 (PPM)

Estimated Radioactivity from Carobbiite - mild
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 9.11 cm 20,391 5.51E-07 935.96 0.31
100 gm / 4.23 cm 2,039 5.51E-08 93.60 0.03
10 gm / 1.96 cm 204 5.51E-09 9.36 0.00
1 gm / 9.11 mm 20 5.51E-10 0.94 0.00
0.1 gm / 4.23 mm 2 5.51E-11 0.09 0.00
0.01 gm / 1.96 mm 0 5.51E-12 0.01 0.00
0.001 gm / 0.91 mm 0 5.51E-13 0.00 0.00

Weight of pure Carobbiite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.53 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
 

Carobbiite Classification

Help on  Dana Class: Dana Class: 09.01.01.04 (09)Anhydrous and Hydrated Halides
  (09.01)where A X
  (09.01.01)Halite Group
 
09.01.01.01 Halite NaCl F m3m 4/m 3 2/m
 
09.01.01.02 Sylvite KCl F m3m 4/m 3 2/m
 
09.01.01.03 Villiaumite NaF F m3m 4/m 3 2/m
 
09.01.01.04 Carobbiite KF F m3m 4/m 3 2/m
 
09.01.01.05 Griceite LiF F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 03.AA.20 03 - HALIDES
  03.A - Simple Halides, Without H2O
  03.AA -M:X = 1:1, 2:3, 3:5, etc.
 
03.AA.20 Carobbiite KF F m3m 4/m 3 2/m
 
03.AA.20 Griceite LiF F m3m 4/m 3 2/m
 
03.AA.20 Halite NaCl F m3m 4/m 3 2/m
 
03.AA.20 Sylvite KCl F m3m 4/m 3 2/m
 
03.AA.20 Villiaumite NaF F m3m 4/m 3 2/m
 

Other Carobbiite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Carobbiite :
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 Carobbiite using:

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

Visit our Advertisers for Carobbiite :

Ask about Carobbiite 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 Carobbiite Specimen Label here :

Carobbiite

KF
Dana No: 09.01.01.04 Strunz No: 03.AA.20
Locality:

 

Notes:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.