Er	Z =  68	◊ ◊ ◊ ◊ ◊	Erbium
			From the Swedish "Ytterby", meaning "outer village"
(AM) Atomic Mass	167.26  amu	♦	Oxidation States	+3
(BP) Boiling Point	2510  °C	♦	(MP) Melting Point	1522  °C
(ρ) Density	9.04  g/cm3	♦	Crystal Structure	Hexagonal
( χ ) Electronegativity	1.2	♦	(AR) Atomic Radius	1.57  Å
Physical State	Solid	♦	(C) Heat Capacity	0.168  J/g °C
Electronic-Config	[Xe]  4f12  6s2	♦	(I1) First Ionization E	588.65  kJ/mol
(ΔHvap) Heat of Vaporization	280  kJ/mol	♦	(ΔHfus) Heat of Fusion	19.9  kJ/mol
Year of Discovery	1842	♦	Location of Discovery	Sweden
(E°) Standard Potential	Er2+⇔ Er (-2.000 V),   Er3+⇔ Er (-2.331 V)
Stable isotopes	162Er,  164Er,  166Er,  167Er,  168Er,  170Er
Discovered/Synthesized by	Carl Gustaf Mosander
Natural Source	The mineral/ore gadolinite
Common Uses	Fiber optic signal amplifiers, IR lasers, laser surgery, pink glass, sunglasses, vanadium alloys
Other Info	One of four elements named after Ytterby, Sweden
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