NCalc= 1.78 - from Gladstone-Dale relationship (KC = 0.1689) where Ncalc=Dcalc*KC+1 NCalc= 1.8 - from Gladstone-Dale relationship (KC = 0.1689) where Ncalc=Dmeas*KC+1
Calculated Properties of Hydroxylbastnasite-(La)
Electron Density:
Bulk Density (Electron Density)=4.13 gm/cc note: Specific Gravity of Hydroxylbastnasite-(La) =4.64 gm/cc.
Fermion Index:
Fermion Index = 0.0013338425 Boson Index = 0.9986661575
Photoelectric:
PEHydroxylbastnasite-(La) = 311.11 barns/electron U=PEHydroxylbastnasite-(La) x relectron=1,283.62 barns/cc.
Radioactivity:
GRapi = 61,017.66 (Gamma Ray American Petroleum Institute Units)
Concentration of Hydroxylbastnasite-(La) per GRapi unit = 16.39 (PPM)
Hydroxylbastnasite-(La) 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)
498.49 ±124.62 grams of pure Hydroxylbastnasite-(La) .
Estimated Radioactivity from Hydroxylbastnasite-(La) - 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 / 7.44 cm
1,441,022
3.89E-05
61,017.66
20.06
100 gm / 3.45 cm
144,102
3.89E-06
6,101.77
2.01
10 gm / 1.60 cm
14,410
3.89E-07
610.18
0.20
1 gm / 7.44 mm
1,441
3.89E-08
61.02
0.02
0.1 gm / 3.45 mm
144
3.89E-09
6.10
0.00
0.01 gm / 1.60 mm
14
3.89E-10
0.61
0.00
0.001 gm / 0.74 mm
1
3.89E-11
0.06
0.00
Weight of pure Hydroxylbastnasite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.64 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 ( 3.22 % Th) From Sum REE Elements (64.33 % REE)
Chemical Formula: 
- weak