CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1997,KPDmeas= 0.2022,KC= 0.1981 Ncalc = 1.63 - 1.64
Optical Data:
Uniaxial (-), e=1.627, w=1.663, bire=0.0360.
Calculated Properties of Kamphaugite-(Y)
Electron Density:
Bulk Density (Electron Density)=3.11 gm/cc note: Specific Gravity of Kamphaugite-(Y) =3.23 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEKamphaugite-(Y) = 107.03 barns/electron U=PEKamphaugite-(Y) x relectron= 332.49 barns/cc.
Radioactivity:
GRapi = 13,675.32 (Gamma Ray American Petroleum Institute Units)
Concentration of Kamphaugite-(Y) per GRapi unit = 73.12 (PPM)
Kamphaugite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Kamphaugite-(Y) - 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 / 8.39 cm
298,594
8.07E-06
13,675.32
4.50
100 gm / 3.90 cm
29,859
8.07E-07
1,367.53
0.45
10 gm / 1.81 cm
2,986
8.07E-08
136.75
0.04
1 gm / 8.39 mm
299
8.07E-09
13.68
0.00
0.1 gm / 3.90 mm
30
8.07E-10
1.37
0.00
0.01 gm / 1.81 mm
3
8.07E-11
0.14
0.00
0.001 gm / 0.84 mm
0
8.07E-12
0.01
0.00
Weight of pure Kamphaugite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.23 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 ( 0.66 % Th) From Sum REE Elements (13.28 % REE)
Chemical Formula: 
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- weak