Solid phase
Official name
Tellurium
Secondary names
Tellur; Te
CAS number
13494-80-9
Type
Family
metallic solid
Class
pseudometal (semi-conductor)
Compound type
semi-conductor
Chemical composition
Formula
Te
Chemical formula
Te
Elemental formula
Te
Isotope mixture type
terrestrial abundance
2.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
Te Tellurium element 1 1.0 1 pure main
Chemical bonds
  Bond Number
−Te−Te− 2
Class
pseudometals (14)
Type
homovalent monolayer pseudometals (14.01)
Equivalent mineral
Tellurium
Phase type
crystalline
Crystal system
trigonal
Crystal class
trapezohedral
Crystal class symbol
32 (D3)
Crystal spacegroup
P3(1)21
Comments
Te chains (covalent bonds) forming helices
Molar mass
127.60 g/mol
Density
6.237 g/cm3
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid Te 449.51°C (722.66 K)
Refringence type
uniaxial
Pure color
gray
Color
Tin-white, silvery lustrous gray
Diaphaneity
opaque
Luster
metallic
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