Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Platy - Sheet forms (e.g. micas).
Hardness:
2-3 - Gypsum-Calcite
Luster:
Vitreous - Pearly
Streak:
brownish white
Optical Properties of Fritzscheite
Gladstone-Dale:
CI meas= 0.295 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.367 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1176,KPDmeas= 0.131,KC= 0.1859 Ncalc = 1.82 - 1.91
Optical Data:
Biaxial (-), b=1.57-1.58, 2V(Meas)=0-25.
Calculated Properties of Fritzscheite
Electron Density:
Bulk Density (Electron Density)=3.94 gm/cc note: Specific Gravity of Fritzscheite =4.39 gm/cc.
Fermion Index:
Fermion Index = 0.0038197844 Boson Index = 0.9961802156
Photoelectric:
PEFritzscheite =1,207.21 barns/electron U=PEFritzscheite x relectron=4,759.43 barns/cc.
Radioactivity:
GRapi = 3,647,724.57 (Gamma Ray American Petroleum Institute Units)
Concentration of Fritzscheite per GRapi unit = 274.14 (PPB)
Fritzscheite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Fritzscheite - very strong
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 / 7.58 cm
85,296,732
2.31E-03
3,647,724.57
1,199.25
100 gm / 3.52 cm
8,529,673
2.31E-04
364,772.46
119.93
10 gm / 1.63 cm
852,967
2.31E-05
36,477.25
11.99
1 gm / 7.58 mm
85,297
2.31E-06
3,647.72
1.20
0.1 gm / 3.52 mm
8,530
2.31E-07
364.77
0.12
0.01 gm / 1.63 mm
853
2.31E-08
36.48
0.01
0.001 gm / 0.76 mm
85
2.31E-09
3.65
0.00
Weight of pure Fritzscheite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.39 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
Chemical Formula: 
- very strong