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Wyckoff R W G , Crystal Structures , 1 (1963) p.7-83, Second edition. Interscience Publishers, New York, New York, Hexagonal closest packed, hcp, structure
Physical Properties of Rhenium
Color:
Black.
Density:
21.03
Diaphaneity:
Opaque
Luster:
Metallic
Calculated Properties of Rhenium
Electron Density:
Bulk Density (Electron Density)=16.9 gm/cc note: Specific Gravity of Rhenium =21.0 gm/cc.
Fermion Index:
Fermion Index = 0 Boson Index = 1
Photoelectric:
PERhenium =1,406.57 barns/electron U=PERhenium x relectron=23828.41 barns/cc.
Radioactivity:
GRapi = 39,126.96 (Gamma Ray American Petroleum Institute Units)
Concentration of Rhenium per GRapi unit = 25.56 (PPM)
Rhenium is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 4.49 cm
1,020,000
2.76E-05
39,126.96
12.86
100 gm / 2.09 cm
102,000
2.76E-06
3,912.70
1.29
10 gm / 9.68 mm
10,200
2.76E-07
391.27
0.13
1 gm / 4.49 mm
1,020
2.76E-08
39.13
0.01
0.1 gm / 2.09 mm
102
2.76E-09
3.91
0.00
0.01 gm / 0.97 mm
10
2.76E-10
0.39
0.00
0.001 gm / 0.45 mm
1
2.76E-11
0.04
0.00
Weight of pure Rhenium in grams (gm) and Calculated Diameter of a Sphere with a Density of 21.03 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