Tm	Z =  69	◊ ◊ ◊ ◊ ◊	Thulium
			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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