Pt | Cobalt

Basic Information

Name

Cobalt

Atomic Number

Appearance

Solid shiny gray metal

Phase At STP

Solid

Spectrum Image

Source

Wikipedia

Bohr Model

Static

Interactive

Descriptive Numbers

CAS Number

7440-48-4

CID Number

CID104730

DOT Number

3089

RTECS Number

RTECSGF8750000

Mendeleev Number

Pettifor Number

Space Group Number

194

Glawe Number

Mass

Atomic Mass

58.9331944 Da

Uncertainty

0.000004

Periodic Position

X Position

Y Position

Period

Group

Classification

Block

Abundance

Urban Soil

0.0141 mg/kg

Seawater

2e-11 kg/L

Sun

0.0023 mole ratio to silicon

Earth Crust

0.000025 g

Human Body

0.000002 %

Solar System

0.0023 mole ratio to silicon

Meteorites

0.059 %

Color

Jmol

#F090A0

Molcas Gv

#F090A0

CPK

#FF1493

Atomic Radius

Empirical

135

Calculated

152

Batsanov

200

Rahm

233

Uff

287.2

Mm3

223

Alvarez

240

Bragg

137

Covalent (Single Bound)

126

Covalent (Triple Bound)

Covalent (Cordero)

138

Covalent (Pyykko)

111

Covalent (Pyykko Double)

103

Covalent (Pyykko Triple)

Mendeleev

116

C12

125

Metallic

125

Temperature

Melting/Freeze (USE)

1768 °K

Melting/Freeze (WEL)

1768 °K

Melting/Freeze (CRC)

1768 °K

Melting/Freeze (LNG)

1767 °K

Boiling/Density (USE)

3200 °K

Boiling/Density (WEL)

3200 °K

Boiling/Density (CRC)

3200 °K

Boiling/Density (LNG)

3200 °K

Boiling/Density (Zhang)

3173 °K

Curie Point

1394 Tc

Density

STP

8.9 kg/cm³

Solid (WEL)

8900 kg/cm³

Solid (CRC)

8860 kg/cm³

Solid (LNG)

8900 kg/cm³

Liquid (CR2)

7750 kg/cm³

Heat

Molar Volume

6.67 cm³/mol

Atomic Volume

6.7 cm³

Heat Of Fusion USE

15.48 kJ/mol

Heat Of Fusion CRC

16.06 kJ/mol

Heat Of Fusion LNG

16.2 kJ/mol

Heat Of Fusion WEL

16.2 kJ/mol

Evaporation USE

389.1 kJ/mol

Evaporation LNG

377 kJ/mol

Evaporation WEL

375 kJ/mol

Evaporation Zhang

390 kJ/mol

Molar Heat

24.81 J/molK

Heat Capacity USE

0.456 J/gK

Heat Capacity CRC

24.81 J/gK

Heat Capacity LNG

24.8 J/gK

Heat Capacity WEL

24.8 J/gK

Thermal Conductivity

100 W/m*K

Thermal Expansion

0.000013 1/K

Adiabatic Index

N/A

Speed of Sound

Extensional

4720 m/s

Electrical Resistance

273k

56 nΩm

293k

62.4 nΩm

Magnetic Properties

Order

From Ferromany

Elasticity

Shear Modulus

75 GPa

Bulk Modulus

180 GPa

Poisson Ratio

0.31 ν

Youngs Modulus

209 GPa

Hardness

Mohs

Brinell

470–3000

Vickers

1043

Etymology

Description

Light gray is a transition element. Some meteorites contain trace amounts of cobalt. It is usually alloyed for its use. Mammals require small amounts of cobalt salt. Cobalt-60, an artificially produced radioactive isotope of cobalt, is an important radioactive tracer and cancer treatment agent. It was discovered by Brandt in 1737.

Language Of Origin

German

Origin Of Word

From the German word Kobold, meaning "genie"

Meaning

cin

Symbol Origin

from German kobold

Etymological Description

It comes from the German word Kobold, meaning "goblin". The element was named this way by miners because it was poisonous and dangerous. Because it was polluting and damaging other elements such as nickel extracted from the mine (like a supernatural creature would do). Other sources attribute the name to miners' belief that cobalt was put there by "Kobolds", or demons, who stole the silver. Some views consider the possibility that the name derives from the Greek word kobalos, which means "mine" and may have common roots with words such as kobold, goblin, cobalt.

Discovery & Isolation

Observed/Predicted By

G. Brandt

Observed/Discovery Year

1735

Discovery Location

Isolated Sample By

G. Brandt

Isolated Sample Year

1735

Production & Use

Sources

It is found in compounds containing arsenic, oxygen and sulfur, such as cobalt (ClAsS) and linneite (Co3S4). Pure cobalt is obtained as a by-product of the refining of nickel, copper and iron.

Uses

Magnets are used in many hard alloys found in ceramics and special glasses. It remains hard up to 982 degrees. The radioactive isotope cobalt-60 is used in cancer treatment.

Radioactivity

Half Life

Stable

Lifetime

Stable

Neutron Mass Absorption

0.021

Neutron Cross Section

37.2

Electron Affinity

Proton Affinity

742.7

Electron Affinity (eV)

0.66225646

Electron Affinity (kJ/mol)

63.898

Electron Affinity (pauling)

1.88

Electron Affinity (allen)

10.86

Electron Affinity (ghosh)

0.1432363

Dipole Polarity

Accepted

Uncertainty

C6 GB

461

C6 Coefficient

408

Lattice

Constant Internal Default Radius

2.51

Constant

250.71, 250.71, 406.95

Strucutre

HEX

Angles

π/2, π/2, 2 π/3

Electron & Quantum

Oxidation States

−3,−1,0,1,2,3,4,5

Electron Configuration

1s2 2s2 2p6 3s2 3p6 4s2 3d7

Quantum Number

4F9/2

Electron Configuration Semantic

[Ar] 3d7 4s2

Shells-0

Shells-1

Shells-2

Shells-3

Ionization Energies-0

760.4

Ionization Energies-1

1648

Ionization Energies-2

3232

Ionization Energies-3

4950

Ionization Energies-4

7670

Ionization Energies-5

9840

Ionization Energies-6

12440

Ionization Energies-7

15230

Ionization Energies-8

17959

Ionization Energies-9

26570

Ionization Energies-10

29400

Ionization Energies-11

32400

Ionization Energies-12

36600

Ionization Energies-13

39700

Ionization Energies-14

42800

Ionization Energies-15

49396

Ionization Energies-16

52737

Ionization Energies-17

134810

Ionization Energies-18

145170

Ionization Energies-19

154700

Ionization Energies-20

167400

Ionization Energies-21

178100

Ionization Energies-22

189300

Ionization Energies-23

204500

Ionization Energies-24

214100

Ionization Energies-25

920870

Ionization Energies-26

966023

List of Compounds

1-10 of 98 compounds

Rows per page:

Formula	Names
Co	cobalt cobalt metal
CoBr2	cobalt dibromide cobalt bromide cobalt(II) bromide cobaltous bromide dibromocobalt
CoCl2	cobalt dichloride cobalt chloride cobalt(II) chloride cobalt muriate cobaltous chloride dichlorocobalt
CoF2	cobalt difluoride cobalt fluoride cobalt(II) fluoride cobaltous fluoride difluorocobalt
CoF3	cobalt trifluoride cobalt fluoride cobaltic fluoride cobalt(III) fluoride trifluorocobalt
CoI2	cobalt(II)iodide cobalt diiodide cobalt iodide cobaltous iodide diiodocobalt
CoO	cobalt monoxide cobalt(2+) oxide cobalt black cobalt(II) oxide cobalt monooxide cobaltous oxide cobalt oxide ketocobalt oxocobalt zaffre
CoS	cobaltous sulfide cobalt(II) sulfide cobalt monosulfide cobalt sulfide sycoporite
CoS2	cobalt disulfide
CoSb	cobalt antimonide

...

Report a bug How to contribute Open source project

CC BY-NC-SA 4.0