Solid phase
Official name
Bismuth
Secondary names
Bismuth-I; Bi-I; Bi
CAS number
7440-69-9
Type
Family
metallic solid
Class
true metal
Compound type
metal
Chemical composition
Formula
$Bi$
Chemical formula
Bi
Elemental formula
Bi
Isotope mixture type
terrestrial abundance
2.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Bi$ Bismuth element 1 1.0 1 constituent element main
Class
true metals (13)
Type
homovalent monolayer metals (13.01)
Equivalent mineral
Bismuth
Phase name
Bismuth-I
Phase type
crystalline
Crystal system
trigonal
Crystal class
ditrigonal-scalenohedral
Crystal class symbol
-3m (D3d)
Crystal spacegroup
R-3m
Molar mass
208.98 $g/mol$
Density
9.807 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid Bi 271.5°C (544.7 K)
solid-solid Bi-II at ambient T, above 2.55 GPa
Phase transitions comments
Bi has 3 high pressure phases: monoclinic Bi-II at 2.55 GPa, tetragonal Bi-III at 2.7 GPa, and cubic Bi-V at 7.7 GPa.
Refringence type
uniaxial
Pure color
silver
Color
brownish silver, gray-white, pinkish-silver
Diaphaneity
opaque
Luster
metallic
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