In piemontite veinlets in liparite porphyry (Nyarta-Syu-Yu River, Russia); in Alpine-type fissures (Binntal, Switzerland)
IMA Status:
Approved IMA 1987
Locality:
Near the head of the Nyarta-Syu-Yu River, east of Mt. Tel�posiz, Polar Ural Mountains, Russia Link to MinDat.org Location Data.
Name Origin:
Named for Professor Aleksandr Aleksandrovich Chernov (1877-1963), Russian geologist, Institute of Geology, Syktyvar, Russia, explorer of the Polar Urals
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Pseudo Octohedral - Crystals show an octohedral outline.
Hardness:
4-5 - Fluorite-Apatite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Chernovite-(Y)
Dichroism (e):
colorless.
Dichroism (w):
pale rose-yellow.
Gladstone-Dale:
CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1738,KPDmeas= 0.1708,KC= 0.1652 Ncalc = 1.79 - 1.8
Optical Data:
Uniaxial (+), w=1.783, e=1.879, bire=0.0960.
Calculated Properties of Chernovite-(Y)
Electron Density:
Bulk Density (Electron Density)=4.43 gm/cc note: Specific Gravity of Chernovite-(Y) =4.87 gm/cc.
Fermion Index:
Fermion Index = 0.0001892059 Boson Index = 0.9998107941
Photoelectric:
PEChernovite-(Y) = 94.90 barns/electron U=PEChernovite-(Y) x relectron= 420.47 barns/cc.
Radioactivity:
GRapi = 5,906.17 (Gamma Ray American Petroleum Institute Units)
Concentration of Chernovite-(Y) per GRapi unit = 169.31 (PPM)
Chernovite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Chernovite-(Y) - 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 / 7.32 cm
136,212
3.68E-06
5,906.17
1.94
100 gm / 3.40 cm
13,621
3.68E-07
590.62
0.19
10 gm / 1.58 cm
1,362
3.68E-08
59.06
0.02
1 gm / 7.32 mm
136
3.68E-09
5.91
0.00
0.1 gm / 3.40 mm
14
3.68E-10
0.59
0.00
0.01 gm / 1.58 mm
1
3.68E-11
0.06
0.00
0.001 gm / 0.73 mm
0
3.68E-12
0.01
0.00
Weight of pure Chernovite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.87 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 ( 0.30 % Th) From Sum REE Elements ( 6.08 % REE)
Chemical Formula: Small.jpg)
- mild