Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
3.5 - Copper Penny
Luminescence:
Non-fluorescent.
Luster:
Greasy (Oily)
Streak:
white
Optical Properties of Rhabdophane-(Ce)
Gladstone-Dale:
CI meas= -0.056 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.103 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.152,KPDmeas= 0.179,KC= 0.1696 Ncalc = 1.68 - 1.8
Optical Data:
Uniaxial (+), w=1.688, e=1.744, bire=0.0560.
Calculated Properties of Rhabdophane-(Ce)
Electron Density:
Bulk Density (Electron Density)=3.63 gm/cc note: Specific Gravity of Rhabdophane-(Ce) =4.00 gm/cc.
Fermion Index:
Fermion Index = 0.0002767203 Boson Index = 0.9997232797
Photoelectric:
PERhabdophane-(Ce) = 277.11 barns/electron U=PERhabdophane-(Ce) x relectron=1,006.27 barns/cc.
Radioactivity:
GRapi = 53,555.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Rhabdophane-(Ce) per GRapi unit = 18.67 (PPM)
Rhabdophane-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 10 cm box)
567.94 ±141.99 grams of pure Rhabdophane-(Ce) .
Estimated Radioactivity from Rhabdophane-(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 / 7.82 cm
1,238,850
3.35E-05
53,555.78
17.61
100 gm / 3.63 cm
123,885
3.35E-06
5,355.58
1.76
10 gm / 1.68 cm
12,389
3.35E-07
535.56
0.18
1 gm / 7.82 mm
1,239
3.35E-08
53.56
0.02
0.1 gm / 3.63 mm
124
3.35E-09
5.36
0.00
0.01 gm / 1.68 mm
12
3.35E-10
0.54
0.00
0.001 gm / 0.78 mm
1
3.35E-11
0.05
0.00
Weight of pure Rhabdophane-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.00 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 ( 2.77 % Th) From Sum REE Elements (55.31 % REE)
Chemical Formula: 
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- weak