Solid phase
Official name
Cementite
Secondary names
Iron carbide
Type
Family
metallic solid
Class
pseudometal (semi-conductor)
Compound type
non-oxide ceramic
Comments
Cementite is very close to cohenite mineral which generally few Ni and Co
Chemical composition
Formula
$Fe_3C$
Chemical formula
Fe3C
Elemental formula
C Fe3
Isotope mixture type
terrestrial abundance
8.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$C$ Carbon element 1 0.25 1.0 constituent element main
$Fe$ Iron element 3 0.75 1.0 constituent element main
Class
pseudometals (14)
Phase type
crystalline
Crystal system
orthorhombic
Crystal class
dipyramidal
Crystal class symbol
mmm (D2h)
Crystal spacegroup
Pnma
Molar mass
179.546 $g/mol$
Density
7.2 - 7.65 $g/cm^3$
State NTP
solid
Diaphaneity
opaque
Luster
metallic
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