Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Equant Grains - Granular material with equel dimensions in x, y, and z.
Hardness:
6 - Orthoclase
Luster:
Vitreous (Glassy)
Streak:
pale lilac
Optical Properties of Kapustinite
Gladstone-Dale:
CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2084,KPDmeas= 0.2114,KC= 0.2077 Ncalc = 1.58 - 1.59
Bulk Density (Electron Density)=2.75 gm/cc note: Specific Gravity of Kapustinite =2.82 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEKapustinite = 27.97 barns/electron U=PEKapustinite x relectron= 76.99 barns/cc.
Radioactivity:
GRapi = 29,152.89 (Gamma Ray American Petroleum Institute Units)
Concentration of Kapustinite per GRapi unit = 34.30 (PPM)
Kapustinite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Kapustinite - 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 / 8.78 cm
627,238
1.70E-05
29,152.89
9.58
100 gm / 4.08 cm
62,724
1.70E-06
2,915.29
0.96
10 gm / 1.89 cm
6,272
1.70E-07
291.53
0.10
1 gm / 8.78 mm
627
1.70E-08
29.15
0.01
0.1 gm / 4.08 mm
63
1.70E-09
2.92
0.00
0.01 gm / 1.89 mm
6
1.70E-10
0.29
0.00
0.001 gm / 0.88 mm
1
1.70E-11
0.03
0.00
Weight of pure Kapustinite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.82 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 ( 0.02 % Th) From Sum REE Elements ( 0.41 % REE)
Chemical Formula: 
- weak