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Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Fluorite structure
Physical Properties of Cerianite-(Ce)
Color:
Greenish yellow, Resin brown, Dark greenish brown.
Density:
7.216
Diaphaneity:
Translucent
Optical Properties of Cerianite-(Ce)
Optical Data:
NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.1474) where Ncalc=Dcalc*KC+1 NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.1474) where Ncalc=Dmeas*KC+1
Calculated Properties of Cerianite-(Ce)
Electron Density:
Bulk Density (Electron Density)=6.84 gm/cc note: Specific Gravity of Cerianite-(Ce) =8.14 gm/cc.
Fermion Index:
Fermion Index = 0.0000790254 Boson Index = 0.9999209746
Photoelectric:
PECerianite-(Ce) =1,039.87 barns/electron U=PECerianite-(Ce) x relectron=7,115.47 barns/cc.
Radioactivity:
GRapi = 533,226.22 (Gamma Ray American Petroleum Institute Units)
Concentration of Cerianite-(Ce) per GRapi unit =1,875.38 (PPB)
Cerianite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Cerianite-(Ce) - strong
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 / 6.17 cm
13,320,856
3.60E-04
533,226.22
175.31
100 gm / 2.86 cm
1,332,086
3.60E-05
53,322.62
17.53
10 gm / 1.33 cm
133,209
3.60E-06
5,332.26
1.75
1 gm / 6.17 mm
13,321
3.60E-07
533.23
0.18
0.1 gm / 2.86 mm
1,332
3.60E-08
53.32
0.02
0.01 gm / 1.33 mm
133
3.60E-09
5.33
0.00
0.001 gm / 0.62 mm
13
3.60E-10
0.53
0.00
Weight of pure Cerianite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 8.14 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