Carobbiite Mineral Data

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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 IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 64686
  PDF 36-1458
 

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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 - HexoctahedralH-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),
Click Here for Large Carobbiite Structure Window Crystal Structure:

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Wyckoff R W G , Crystal Structures , 1 (1963) p.85-237, Second edition. Interscience Publishers, New York, New York, rocksalt structure

 

Physical Properties of Carobbiite

Help on Cleavage: Cleavage: [???] Good
Help on Color: Color: Colorless.
Help on Density: Density: 2.524
Help on Diaphaniety: Diaphaniety: 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 Gladstone-Dale: Gladstone-Dale: CI meas= 0.177 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.179 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1431,KPDmeas= 0.1434,KC= 0.1743
Help on Optical Data: Optical Data: Isotropic, n=1.362.
 

Calculated Properties of Carobbiite

Help on Electron Density: Electron Density:

relectron=2.43 gm/cc
note: rCarobbiite =2.52 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00008
Boson Index = 0.99992
Help on Photoelectric: Photoelectric:

PECarobbiite = 7.03 barns/electron
U=PECarobbiite x relectron= 17.10 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 935.96 (Gamma Ray American Petroleum Institute Units)

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 2.52 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: 9.1.1.4 (9)Anhydrous and Hydrated Halides
  (9.1)where A X
  (9.1.1)Dana Group
 
9.1.1.1 Halite NaCl F m3m 4/m 3 2/m
 
9.1.1.2 Sylvite KCl F m3m 4/m 3 2/m
 
9.1.1.3 Villiaumite NaF F m3m 4/m 3 2/m
 
9.1.1.4 Carobbiite KF F m3m 4/m 3 2/m
 
9.1.1.5 Griceite LiF F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: III/A.02-20 III - Halogenides
  III/A - Simple halogenides, without water Metal : Halogen = 1 : 1
  III/A.02 - Halite series Griceite - Bromargyrite
 
III/A.02-05 Griceite LiF F m3m 4/m 3 2/m
 
III/A.02-10 Villiaumite NaF F m3m 4/m 3 2/m
 
III/A.02-20 Carobbiite KF F m3m 4/m 3 2/m
 
III/A.02-30 Halite NaCl F m3m 4/m 3 2/m
 
III/A.02-40 Sylvite KCl F m3m 4/m 3 2/m
 
III/A.02-50 Chlorargyrite AgCl F m3m 4/m 3 2/m
 
III/A.02-60 Bromargyrite AgBr F m3m 4/m 3 2/m
 

Other Carobbiite Information

Help on References: References: 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Carobbiite

KF
Dana No: 9.1.1.4 Strunz No: III/A.02-20
Locality:

 

Notes:

 

 
   
 
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