Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Pyramidal - Crystals are shaped like pyramids.
Hardness:
4-4.5 - Between Fluorite and Apatite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Bario-olgite
Gladstone-Dale:
CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.158,KPDmeas= 0.1564,KC= 0.1589 Ncalc = 1.63 - 1.64
Optical Data:
Uniaxial (-), e=1.623, w=1.628, bire=0.0050.
Calculated Properties of Bario-olgite
Electron Density:
Bulk Density (Electron Density)=3.62 gm/cc note: Specific Gravity of Bario-olgite =3.96 gm/cc.
Fermion Index:
Fermion Index = 0.06 Boson Index = 0.94
Photoelectric:
PEBario-olgite = 156.19 barns/electron U=PEBario-olgite x relectron= 565.47 barns/cc.
Radioactivity:
GRapi = 3,046.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Bario-olgite per GRapi unit = 328.24 (PPM)
Estimated Radioactivity from Bario-olgite - mild
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 / 7.84 cm
69,979
1.89E-06
3,046.59
1.00
100 gm / 3.64 cm
6,998
1.89E-07
304.66
0.10
10 gm / 1.69 cm
700
1.89E-08
30.47
0.01
1 gm / 7.84 mm
70
1.89E-09
3.05
0.00
0.1 gm / 3.64 mm
7
1.89E-10
0.30
0.00
0.01 gm / 1.69 mm
1
1.89E-11
0.03
0.00
0.001 gm / 0.78 mm
0
1.89E-12
0.00
0.00
Weight of pure Bario-olgite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.96 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 ( 0.16 % Th) From Sum REE Elements ( 3.11 % REE)
Chemical Formula: 
- mild