Estimated Radioactivity from Paratooite-(La) - weak
Specimen Size Weight/Volume (Sphere) *
Calculated Activity Becquerels (Bq)
Calculated Activity Curies (Ci)
Estimated Activity GR(api)
Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.94 cm
871,268
2.35E-05
38,265.53
12.58
100 gm / 3.69 cm
87,127
2.35E-06
3,826.55
1.26
10 gm / 1.71 cm
8,713
2.35E-07
382.66
0.13
1 gm / 7.94 mm
871
2.35E-08
38.27
0.01
0.1 gm / 3.69 mm
87
2.35E-09
3.83
0.00
0.01 gm / 1.71 mm
9
2.35E-10
0.38
0.00
0.001 gm / 0.79 mm
1
2.35E-11
0.04
0.00
Weight of pure Paratooite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.81 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 ( 1.94 % Th) From Sum REE Elements (38.86 % REE)