TmZ =  69

From the Greek "Thula", meaning "a mythical country"
(AM) Atomic Mass 168.9342  amu    Oxidation States +3
   (BP) Boiling Point 1727  °C    (MP) Melting Point 1545  °C
   (ρ) Density 9.32  g/cm3    Crystal Structure Hexagonal
   ( χ ) Electronegativity 1.2    (AR) Atomic Radius 1.56  Å
   Physical State Solid (C) Heat Capacity 0.16  J/g °C
Electronic-Config [Xe]  4f13  6s2     (I1) First Ionization E 596.66  kJ/mol
   (ΔHvap) Heat of Vaporization 247  kJ/mol     (ΔHfus) Heat of Fusion 16.84  kJ/mol
   Year of Discovery 1879    Location of Discovery Sweden
(E°) Standard Potential Tm2+⇔ Tm (-2.400 V),   Tm3+⇔ Tm (-2.319 V)
Stable isotopes  169Tm
Discovered/Synthesized by Per Theodor Cleve
Natural Source The mineral/ore bastnasite, monazite, loparite
Common Uses Infrared lasers, laser surgery, phosphors
Other Info Used in portable x-ray machines
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