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Element
Er
Binary

Al	Al3Er	(#221)
Au	AuEr	(#221)
Bi	BiEr	(#225)
Cd	CdEr	(#221)
C	ErC2	(#139)
Cu	CuEr	(#221)
Ga	ErGa3	(#221)
Hg	ErHg	(#221)
In	ErIn3	(#221)
Mg	ErMg	(#221)
N	ErN	(#225)
Pb	ErPb3	(#221)
Pd	ErPd3	(#221)
P	ErP	(#225)
Pt	ErPt3	(#221)
Rh	ErRh	(#221)
Sb	ErSb	(#225)
Si	ErSi2	(#191)
Sn	ErSn3	(#221)
Tl	ErTl	(#123)
Tl	ErTl3	(#221)
Zn	ErZn	(#221)