Tm
Thulium
Z 69 168.934 g/molLanthanide
Group
3
Period
6
Block
f
Occurrence
Merging neutron stars 87%Dying low-mass stars 13%Geochemical class: Lithophile
Biological Role
---
History
1879 (discovery)
Per Theodor Cleve
1936 (isolation)
Wilhelm Klemm, Heinrich Bommer
Named By
Per Theodor Cleve
Latin Name
Thulium
Abundance
Solar System< 0.0001%0.000181 ppm
x
Sun< 0.0001%0.000161 ppm
x
Meteorites< 0.0001%0.0263 ppm
x
Earth's crust< 0.0001%0.28 ppm
x
Oceans< 0.0001%< 0.0001 ppm
x
Humans---
x