Vesuvius, Campania, Italy. Link to MinDat.org Location Data.
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.
Bulk Density (Electron Density)=2.44 gm/cc note: Specific Gravity of Carobbiite =2.53 gm/cc.
Fermion Index:
Fermion Index = 0.0000807584 Boson Index = 0.9999192416
Photoelectric:
PECarobbiite = 7.03 barns/electron U=PECarobbiite x relectron= 17.14 barns/cc.
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
Chemical Formula: 
- mild