Solid phase
Official name
Synthetic Cobalt
CAS number
7440-48-4
Family
metallic solid
Class
true metal
Compound type
metal
Formula
$Co$
Chemical formula
Co
Elemental formula
Co
Isotope mixture type
terrestrial abundance
2.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Co$ Cobalt element 1 1.0 1 pure main
Class
true metals (13)
Type
homovalent monolayer metals (13.01)
Phase type
crystalline
Crystal system
hexagonal
Crystal class
dihexagonal-dipyramidal
Crystal class symbol
6/mmm (D6h)
Crystal spacegroup
P6(3)/mmc
Molar mass
58.9332 $g/mol$
Density
8.90 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 1768 K ​(1495 °C)
Refringence type
uniaxial
Pure color
gray
Color
gray, white
Diaphaneity
opaque
Luster
metallic