Osmium

Roentgenium

Osmium Roentgenium Comparison

Osmium

Roentgenium

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1 Periodic Table

1.1 Symbol

1.2 Group Number

811

0 17

1.3 Period Number

2 7

1.4 Block

d block

1.5 Element Family

Transition Metal

Unknown

1.6 CAS Number

744004254386242

7429905 54386242

1.7 Space Group Name

P63/mmc

Not Available

1.8 Space Group Number

194.00194.00

11 229

2 Facts

2.1 Interesting Facts

Osmium metal does not oxidize in air unless it is heated.
But if it heated den it forms Osmium Tetroxide, which is highly toxic.

Not Available

2.2 Sources

Found As a By-product, Found in Minerals, Mining

Synthetically Produced

2.3 History

2.3.1 Who Discovered

Smithson Tennant

Gesellschaft für Schwerionenforschung

2.3.2 Discovery

In 1803

In 1994

2.4 Abundance

2.4.1 Abundance In Universe

3 * 10^-7 %NA

5E-09 0.11

2.4.2 Abundance In Sun

~0.0000002 %~-9999 %

1E-08 0.1

2.4.3 Abundance In Meteorites

0.00 %NA

1.7E-07 22

2.4.4 Abundance In Earth's Crust

0.00 %NA

9.9E-12 8.1

2.4.5 Abundance In Oceans

NANA

2E-23 1.1

2.4.6 Abundance In Humans

NANA

1E-13 1.4

3 Uses

3.1 Uses & Benefits

Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
It is also used as industrial catalyst to speed up the chemical reaction.

Currently known uses of Roentgenium metal are limited to research purpose only.

3.1.1 Industrial Uses

Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry

3.1.2 Medical Uses

3.1.3 Other Uses

Alloys

Research Purposes

3.2 Biological Properties

3.2.1 Toxicity

Highly Toxic

Unknown

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

NA0.00 Blood/mg dm-3

0 1970

3.2.4 In Bone

NA0.00 p.p.m.

0 170000

4 Physical

4.1 Melting Point

3,045.00 °CNA

27 3410

4.2 Boiling Point

5,027.00 °CNA

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Silvery Bluish-Gray

Silver

4.3.3 Luster

Metallic

Unknown Luster

4.4 Hardness

4.4.1 Mohs Hardness

7.00NA

0.2 8.5

4.4.2 Brinell Hardness

3,490.00 MPaNA

0.14 3490

4.4.3 Vickers Hardness

NANA

121 3430

4.5 Speed of Sound

4,940.00 m/sNA

818 16200

4.6 Optical Properties

4.6.1 Refractive Index

NANA

1.000933 1.7229

4.6.2 Reflectivity

NANA

58 97

4.7 Allotropes

✔ ✘

4.7.1 α Allotropes

Not Available

4.7.2 β Allotropes

Not Available

4.7.3 γ Allotropes

Not Available

5 Chemical

5.1 Chemical Formula

5.2 Isotopes

5.2.1 Known Isotopes

351

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

2.20NA

0.7 2.54

5.3.2 Sanderson Electronegativity

NANA

0.22 2.56

5.3.3 Allred Rochow Electronegativity

1.52NA

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

NANA

0.62 2.48

5.3.5 Allen Electronegativity

1.65NA

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

1.80NA

1.46 3.3

1.2 Ionization Energies

1.2.1 1st Energy Level

840.00 kJ/mol1,022.70 kJ/mol

375.7 26130

1.2.3 2nd Energy Level

1,309.80 kJ/mol2,074.40 kJ/mol

710.2162 28750

1.3.1 3rd Energy Level

1,600.00 kJ/mol3,077.90 kJ/mol

1600 34230

1.4.1 4th Energy Level

NA4,052.40 kJ/mol

2780 37066

1.5.2 5th Energy Level

NA5,306.70 kJ/mol

4305.2 97510

1.5.4 6th Energy Level

NANA

5715.8 105800

1.6.2 7th Energy level

NANA

7226.8 114300

1.6.3 8th Energy Level

NANA

8857.4 125300

1.6.5 9th Energy Level

NANA

14110 134700

1.6.6 10th Energy Level

NANA

17100 144300

1.6.8 11th Energy Level

NANA

19900 169988

1.6.9 12th Energy Level

NANA

22219 189368

1.7.1 13th Energy Level

NANA

26930 76015

1.8.1 14th Energy Level

NANA

29196 86450

1.8.2 15th Energy Level

NANA

41987 97510

1.8.3 16th Energy Level

NANA

47206 109480

1.8.4 17th Energy Level

NANA

52737 122200

1.8.5 18th Energy Level

NANA

58570 134810

1.8.6 19th Energy Level

NANA

64702 148700

1.8.7 20th Energy Level

NANA

80400 171200

1.8.8 21st Energy Level

NANA

87000 179100

1.8.9 22nd Energy Level

NANA

93400 184900

1.8.10 23rd Energy Level

NANA

98420 198800

1.8.11 24th Energy Level

NANA

104400 195200

1.8.12 25th Energy Level

NANA

121900 121900

1.8.13 26th Energy Level

NANA

127700 127700

1.8.14 27th Energy Level

NANA

133800 133800

1.8.15 28th Energy Level

NANA

139800 139800

1.8.16 29th Energy Level

NANA

148100 148100

1.8.17 30th Energy Level

NANA

154500 154500

1.9 Electrochemical Equivalent

1.77 g/amp-hrNA

0.16812 8.3209

1.10 Electron Work Function

4.83 eVNA

2.14 5.65

1.11 Other Chemical Properties

Chemical Stability, Ionization, Solubility

2 Atomic

2.1 Atomic Number

76111

3 117

2.2 Electron Configuration

[Xe] 4f¹⁴ 5d⁶ 6s²

[Rn] 5f¹⁴ 6d⁹ 7s²

2.3 Crystal Structure

Hexagonal Close Packed (HCP)

Body Centered Cubic (BCC)

2.3.1 Crystal Lattice

2.4 Atom

2.4.1 Number of Protons

76111

3 117

2.4.2 Number of Neutrons

114161

4 184

2.4.3 Number of Electrons

76111

3 117

2.5 Radius of an Atom

2.5.1 Atomic Radius

133.80 pmNA

112 265

2.5.2 Covalent Radius

NANA

96 260

2.5.3 Van der Waals Radius

216.00 pmNA

139 348

2.6 Atomic Weight

190.23 amu281.00 amu

6.94 294

2.7 Atomic Volume

8.49 cm3/molNA

1.39 71.07

2.8 Adjacent Atomic Numbers

2.8.1 Previous Element

2.8.2 Next Element

2.9 Valence Electron Potential

91.40 (-eV)NA

8 392.42

2.10 Lattice Constant

273.44 pmNA

228.58 891.25

2.11 Lattice Angles

π/2, π/2, 2 π/3

2.12 Lattice C/A Ratio

1.58NA

1.567 1.886

3 Mechanical

3.1 Density

3.1.1 Density At Room Temperature

22.59 g/cm³28.70 g/cm³

0.534 40.7

3.1.2 Density When Liquid (at m.p.)

20.00 g/cm3NA

0.512 20

3.2 Tensile Strength

1,000.00 MPaNA

2.5 11000

3.3 Viscosity

NANA

0.001526 0.001526

3.4 Vapor Pressure

3.4.1 Vapor Pressure at 1000 K

NANA

2.47E-11 121

3.4.2 Vapor Pressure at 2000 K

0.00 (Pa)NA

2.62E-10 774

3.5 Elasticity properties

3.5.1 Shear Modulus

222.00 GPaNA

1.3 222

3.5.2 Bulk Modulus

462.00 GPaNA

1.6 462

3.5.3 Young's Modulus

NANA

1.7 528

3.6 Poisson Ratio

0.25NA

0.032 0.47

3.7 Other Mechanical Properties

Ductile

Unknown

4 Magnetic

4.1 Magnetic Characteristics

4.1.1 Specific Gravity

22.57NA

0.53 4500

4.1.2 Magnetic Ordering

Paramagnetic

Unknown

4.1.3 Permeability

NANA

1.25643E-06 0.0063

4.1.4 Susceptibility

NANA

-0.000166 200000

4.2 Electrical Properties

4.2.1 Electrical Property

Conductor

Unknown

4.2.2 Resistivity

81.20 nΩ·mNA

0.18 961

4.2.3 Electrical Conductivity

0.11 10⁶/cm ΩNA

0.00666 0.63

4.2.4 Electron Affinity

106.10 kJ/molNA

0 222.8

5 Thermal

5.1 Specific Heat

0.13 J/(kg K)NA

0.11 3.6

5.2 Molar Heat Capacity

24.70 J/mol·KNA

16.443 62.7

5.3 Thermal Conductivity

87.60 W/m·KNA

6.3 429

5.4 Critical Temperature

NANA

26.3 3223

5.5 Thermal Expansion

5.10 µm/(m·K)NA

4.5 97

5.6 Enthalpy

5.6.1 Enthalpy of Vaporization

627.60 kJ/molNA

7.32 799.1

5.6.2 Enthalpy of Fusion

29.30 kJ/molNA

2.1 35.23

5.6.3 Enthalpy of Atomization

669.00 kJ/molNA

61.5 837

5.7 Standard Molar Entropy

32.60 J/mol.KNA

9.5 198.1

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