Brittle - Generally displayed by glasses and most non-metallic minerals.
Luster:
Silky
Streak:
light green
Optical Properties of Lermontovite
Gladstone-Dale:
CI meas= -0.175 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.349 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1803,KPDmeas= 0.157,KC= 0.1336 Ncalc = 1.52 - 1.6
Estimated Radioactivity from Lermontovite - 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 / 7.52 cm
115,773,163
3.13E-03
4,733,701.49
1,556.29
100 gm / 3.49 cm
11,577,316
3.13E-04
473,370.15
155.63
10 gm / 1.62 cm
1,157,732
3.13E-05
47,337.01
15.56
1 gm / 7.52 mm
115,773
3.13E-06
4,733.70
1.56
0.1 gm / 3.49 mm
11,577
3.13E-07
473.37
0.16
0.01 gm / 1.62 mm
1,158
3.13E-08
47.34
0.02
0.001 gm / 0.75 mm
116
3.13E-09
4.73
0.00
Weight of pure Lermontovite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.50 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