Rhenium

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Rhenium Quick Reference

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Notes

Symbol

Re

Atomic Number

75

Atomic Weight

Rounded

186.2

for regular calculations

Standard

186.207 ± 0.001

for precise calculations

Oxidation States

 7

less common with disagreement

 6

less common

 5

more common with disagreement

 4

more common

 3

more common with disagreement

 2

less common with disagreement

 1

less common

 0

less common

-1

less common

-3

less common

Pauling Electronegativity

1.9

Electron Configuration

Orbital Occupancy

[Xe] 4f14 5d5 6s2

[Xe] represents the closed-shell electron configuration of xenon

Orbital Filling Order

[Xe] 6s2 4f14 5d5

[Xe] represents the closed-shell electron configuration of xenon

Term Symbol

6S5/2

see expanded configuration ...

Ionization Energies

I (1)

7.83352 eV

Electron Affinity

0.15 ± 0.15 eV  

1200 ± 1200 cm-1

Density

liquid, 3459.15 K

18.900 g/ml 

solid, 25 °C

20.800 g/cm3

Molar Volume

solid, 298 K, 1 atm

8.86 cm3/mol

Melting Point

3458 ± 20 K

Boiling Point

1 atm

5869.15 K

Thermal Conductivity

solid

400 K, polycrystalline

46.1 W/(m K)

300 K, polycrystalline

47.9 W/(m K)

298.2 K, polycrystalline

48.0 W/(m K)

273.2 K, polycrystalline

48.6 W/(m K)

200 K, polycrystalline

51.0 W/(m K)

see all 48 conductivities ...

Pyykkö Covalent Radius

single bond

131 pm

double bond

119 pm

triple bond

110 pm

Atomic Radius

137 pm

Enthalpy of Fusion

1 atm

33.1 kJ/mol

Enthalpy of Vaporization

1 atm

707.1 kJ/mol

Quantity

Rhenium Atomic Structure

Notes

Ionization Energies

I (1)

7.83352 eV

Electron Affinity

0.15 ± 0.15 eV  

1200 ± 1200 cm-1

Electron Binding Energies

K    (1s)

71676 eV  

LI   (2s)

12527 eV  

LII  (2p1/2)

11959 eV  

LIII (2p3/2)

10535 eV  

see all 19 energies ...

Electron Configuration

Orbital Occupancy

[Xe] 4f14 5d5 6s2

[Xe] represents the closed-shell electron configuration of xenon

Orbital Filling Order

[Xe] 6s2 4f14 5d5

[Xe] represents the closed-shell electron configuration of xenon

Term Symbol

6S5/2

see expanded configuration ...

Clementi-Raimondi Effective Nuclear Charge

1s

Orbital Exponent

73.5478

ζ

Principle Quantum Number

1

n

Effective Nuclear Charge

73.5478

Zeff = ζ × n

2s

Orbital Exponent

27.7049

ζ

Principle Quantum Number

2

n

Effective Nuclear Charge

55.4098

Zeff = ζ × n

see all 14 effective nuclear charges ...

Screening Percentage

87.1%

Fluorescence Yields

ωK

0.955

ωL1

0.15 

ωL2

0.304

ωL3

0.271

Coster-Kronig Yields

F12

0.07 

F13

0.482

F23

0.131

Quantity

Rhenium Physical Properties

Notes

Density

liquid, 3459.15 K

18.900 g/ml 

solid, 25 °C

20.800 g/cm3

Molar Mass

Rounded

186.2 g/mol

for regular calculations

Standard

186.207 ± 0.001 g/mol

for precise calculations

Molar Volume

solid, 298 K, 1 atm

8.86 cm3/mol

Physical Form

silvery-gray metal

Linear Thermal Expansion Coefficient

25 °C

6.2×10-6 K-1

Speed of Sound

solid, 293 K, annealed

4690 m/s to 4710 m/s

calculated value

Young's Modulus

520 GPa

Poisson's Ratio

0.260

Electrical Resistivity

solid, 295 K

18.6×10-8 Ohm m

Photoelectric Work Function

5.0 eV

Thermionic Work Function

5.1 eV

Superconducting Transition Temperature

1.697 ± 0.006 K

Superconducting Critical Magnetic Field at Absolute Zero

198×10-4 T

Mineralogical Hardness

7.0

Vickers Hardness

annealed, 293 K

2450 MN/m2

strained, 293 K

7850 MN/m2

Isothermal Bulk Modulus

300 K

372 GPa

Isothermal Compressibility

300 K

0.00269 GPa-1

Gram Atomic Volume

9 cm3

Quantity

Rhenium Atomic Interaction

Notes

Oxidation States

 7

less common with disagreement

 6

less common

 5

more common with disagreement

 4

more common

 3

more common with disagreement

 2

less common with disagreement

 1

less common

 0

less common

-1

less common

-3

less common

Pauling Electronegativity

1.9

Allred-Rochow Electronegativity

1.46

Configuration Energy

electron volt units

9.46 eV

Pauling units

1.60   

Nagle Electronegativity

1.35

Pearson Absolute Electronegativity

4.02 eV

Chemical Hardness

3.87 eV

Cohesive Energy

per mole

775 kJ/mol    

per atom

  8.03 eV/atom

Quantity

Rhenium Thermodynamics

Notes

Melting Point

3458 ± 20 K

Boiling Point

1 atm

5869.15 K

Thermal Conductivity

solid

400 K, polycrystalline

46.1 W/(m K)

300 K, polycrystalline

47.9 W/(m K)

298.2 K, polycrystalline

48.0 W/(m K)

273.2 K, polycrystalline

48.6 W/(m K)

200 K, polycrystalline

51.0 W/(m K)

see all 48 conductivities ...

Critical Point

20500 K

Vapor Pressure

5681 °C

100 kPa

4854 °C

10 kPa

4227 °C

1 kPa

3736 °C

100 Pa

3341 °C

10 Pa

3030 °C

1 Pa

Enthalpy of Fusion

1 atm

33.1 kJ/mol

Enthalpy of Vaporization

1 atm

707.1 kJ/mol

Isobaric Molar Heat Capacity

298.15 K, 1 bar

25.48 J/(mol K)

Isobaric Specific Heat Capacity

298.15 K, 1 bar

0.137 J/(g K)

Electronic Heat Capacity Coefficient

2.29 mJ/(mol K2)

Debye Temperature

Low Temperature Limit ( 0 K )

416 K

Room Temperature ( 298 K )

275 K

Quantity

Rhenium Identification

Notes

CAS Number

7440-15-5

Quantity

Rhenium Atomic Size

Notes

Atomic Radius

137 pm

Orbital Radius

131.0 pm

Pyykkö Covalent Radius

single bond

131 pm

double bond

119 pm

triple bond

110 pm

Cordero Covalent Radius

151 pm

Shannon-Prewitt Crystal Radius

ion charge: +4, coordination number: 6

77 pm

ion charge: +5, coordination number: 6

72 pm

ion charge: +6, coordination number: 6

69 pm

ion charge: +7

coordination number: 4

52 pm

coordination number: 6

67 pm

Shannon-Prewitt Effective Ionic Radius

ion charge: +4, coordination number: 6

63 pm

ion charge: +5, coordination number: 6

58 pm

ion charge: +6, coordination number: 6

55 pm

ion charge: +7

coordination number: 4

38 pm

coordination number: 6

53 pm

Batsanov Crystallographic Van Der Waals Radius

205 pm

Batsanov Equilibrium Van Der Waals Radius

235 pm

Slater Atomic-Ionic Radius

135 pm

Quantity

Rhenium Crystal Structure

Notes

Nearest Neighbor Distance

300 K, 1 atm

274 pm

Atomic Concentration

300 K, 1 atm

6.80×1022 cm-3

Quantity

Rhenium History

Notes

Discovery

date of discovery

1925

discoverer

Walter Karl Friedrich Noddack

birth

1893

death

1960

discoverer

Ida Tacke Noddack

birth

1896

death

1978

discoverer

Otto Berg

birth

1874

death

1939

location of discovery

Berlin, Germany

Origin of Element Name

origin

rhenus

origin description

place—Latin name for the Rhine

Origin of Element Symbol

symbol: Re

origin

rhenium

origin description

element name

Formerly Used or Proposed Element Names and Symbols

name

dwi-manganese

no matching symbol specified

Quantity

Rhenium Abundances

Notes

Earth's Crust

7×10-4 ppm

Earth's Mantle

0.32 ppb

primitive mantle

Earth's Core

0.23 ppm

Bulk Earth

0.075 ppm

Ocean Water

1×10-6 ppm

U.S. Coal

<0.001 ppm

estimated from USGS and literature data

Solar System

0.0517

number of atoms for every 106 atoms of silicon

Meteorites

0.28 ± 0.03

base 10 log of the number of atoms for every 1012 atoms of hydrogen

Quantity

Rhenium Nomenclature

Notes

Element Names in Other Languages

French

rhénium

German

Rhenium

Italian

renio

Spanish

renio

Portuguese

rénio

Anions or Anionic Substituent Groups

rhenide

Cations or Cationic Substituent Groups

rhenium

Ligands

rhenido

Heteroatomic Anion

rhenate

'a' Term—Substitutive Nomenclature

rhena

'y' Term—Chains and Rings Nomenclature

rheny

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