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Nickel E H , Grey I E , Madsen I C , American Mineralogist , 72 (1987) p.1006-1010, Lucasite-(Ce), CeTi2(O,OH)6, a new mineral from Western Australia: Its, description and structure
Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.26 cm
942,857
2.55E-05
40,733.02
13.39
100 gm / 3.37 cm
94,286
2.55E-06
4,073.30
1.34
10 gm / 1.56 cm
9,429
2.55E-07
407.33
0.13
1 gm / 7.26 mm
943
2.55E-08
40.73
0.01
0.1 gm / 3.37 mm
94
2.55E-09
4.07
0.00
0.01 gm / 1.56 mm
9
2.55E-10
0.41
0.00
0.001 gm / 0.73 mm
1
2.55E-11
0.04
0.00
Weight of pure Lucasite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.00 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 ( 2.10 % Th) From Sum REE Elements (42.09 % REE)
Lucasite-(Ce) Classification
Dana Class:
08.03.05.01(08)Multiple Oxides with Nb, Ta, and Ti