Brittle - Uneven - Very brittle fracture producing uneven fragments.
Hardness:
3 - Calcite
Luster:
Vitreous - Pearly
Streak:
white
Optical Properties of Chukhrovite-(Ce)
Optical Data:
Isotropic, n=1.443.
Calculated Properties of Chukhrovite-(Ce)
Electron Density:
Bulk Density (Electron Density)=2.26 gm/cc note: Specific Gravity of Chukhrovite-(Ce) =2.31 gm/cc.
Fermion Index:
Fermion Index = 0.0006224655 Boson Index = 0.9993775345
Photoelectric:
PEChukhrovite-(Ce) = 65.71 barns/electron U=PEChukhrovite-(Ce) x relectron= 148.80 barns/cc.
Radioactivity:
GRapi = 13,324.68 (Gamma Ray American Petroleum Institute Units)
Concentration of Chukhrovite-(Ce) per GRapi unit = 75.05 (PPM)
Chukhrovite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Chukhrovite-(Ce) - weak
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 / 9.39 cm
285,427
7.71E-06
13,324.68
4.38
100 gm / 4.36 cm
28,543
7.71E-07
1,332.47
0.44
10 gm / 2.02 cm
2,854
7.71E-08
133.25
0.04
1 gm / 9.39 mm
285
7.71E-09
13.32
0.00
0.1 gm / 4.36 mm
29
7.71E-10
1.33
0.00
0.01 gm / 2.02 mm
3
7.71E-11
0.13
0.00
0.001 gm / 0.94 mm
0
7.71E-12
0.01
0.00
Weight of pure Chukhrovite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.31 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
Estimated Thorium Activity ( 0.64 % Th) From Sum REE Elements (12.74 % REE)
Chemical Formula: 
- weak