Kara-Oba Mo-�W deposit, Bet-Pak-Dal Desert, central Kazakhstan. Link to MinDat.org Location Data.
Name Origin:
Named for Fedor Vasilevich Chukhrov (1908�1988), Russian mineralogist, Director, Institute of Geology of Ore Deposits, Petrology, Mineralogy, and Geochemistry, Moscow, Russia.
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Hardness:
3 - Calcite
Luster:
Vitreous - Pearly
Streak:
white
Optical Properties of Chukhrovite-(Y)
Optical Data:
Isotropic, n=1.44.
Calculated Properties of Chukhrovite-(Y)
Electron Density:
Bulk Density (Electron Density)=2.21 gm/cc note: Specific Gravity of Chukhrovite-(Y) =2.24 gm/cc.
Fermion Index:
Fermion Index = 0.0006424104 Boson Index = 0.9993575896
Photoelectric:
PEChukhrovite-(Y) = 32.93 barns/electron U=PEChukhrovite-(Y) x relectron= 72.87 barns/cc.
Radioactivity:
GRapi = 4,619.58 (Gamma Ray American Petroleum Institute Units)
Concentration of Chukhrovite-(Y) per GRapi unit = 216.47 (PPM)
Chukhrovite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Chukhrovite-(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 / 9.48 cm
98,191
2.65E-06
4,619.58
1.52
100 gm / 4.40 cm
9,819
2.65E-07
461.96
0.15
10 gm / 2.04 cm
982
2.65E-08
46.20
0.02
1 gm / 9.48 mm
98
2.65E-09
4.62
0.00
0.1 gm / 4.40 mm
10
2.65E-10
0.46
0.00
0.01 gm / 2.04 mm
1
2.65E-11
0.05
0.00
0.001 gm / 0.95 mm
0
2.65E-12
0.00
0.00
Weight of pure Chukhrovite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.24 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 ( 0.22 % Th) From Sum REE Elements ( 4.38 % REE)
Chemical Formula: Small.jpg)
- mild