Mineral Species containing Erbium (Er)

Element Properties, Isotopic Compositions for Erbium

**Erbium (Er) Element Properties**
Atomic Mass	167.26
Atomic Number	68
Name Origins	Named after Ytterby, Sweden.
Year Discovered	1842
Discovery Credits	Discovered by C. G. Mosander at Stockholm, Sweden.
Remarks	Silver-gray metal of the rare earth group. slowly tarnishes in air, slowly reacts with water, dissolves in acids. Used in infrared absorbing glass, alloys with titanium. Diagnostic tests: There are no simple diagnostic tests to identify erbium. X-ray fluorescence spectroscopy is commonly employed to identify and analyze members of the Rare-Earth group elements.
References	Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also	WebElements, ChemiCool

**Naturally Occurring Isotopes**
Symbol	Isotope Mass	Isotope Nuclide Number	Isotope Number	Natural Abundance	Half-life Units
Er	163.929198	164	68	1.6100%	Stable
Er	165.930293	166	68	33.6000%	Stable
Er	166.932046	167	68	22.9500%	Stable
Er	167.932368	168	68	26.8000%	Stable
Er	169.935461	170	68	14.9000%	Stable

Erbium (Er) Minerals sorted by Mineral Name

Click here for List sorted by Weight Percent

**10 Minerals containing Erbium (Er) sorted by Mineral Name**
% Er	Mineral Name	Chemical Formula	MW
2.43 % Er	Adamsite-(Y) !	NaY(CO3)2·6(H2O)	344.24
2.12 % Er	Decrespignyite-(Y) !	(Y,REE)4Cu(CO3)4Cl(OH)5·2(H2O)	867.49
0.03 % Er	Dissakisite-(La) !	(Ca,Fe++,Th, La)(La,REE,Ca)(Al,Cr,Ti)2(Mg,Fe,Al)Si3O12(OH,F) with La > Ce	551.33
0.24 % Er	Fluorcalciobritholite !	(Ca,REE)5[(Si,P)O4]3F	710.23
1.54 % Er	Hingganite-(Y)	Y2([ ])Be2Si2O8(OH)2	433.65
1.60 % Er	Iwashiroite-(Y) !	YTaO4	313.16
1.12 % Er	Moskvinite-(Y) !	Na2K(Y,REE) [Si6O15]	598.41
3.11 % Er	Samarskite-(Yb) !	(Yb,Y,REE,U,Th,Ca,Fe++) (Nb,Ta,Ti)O4	312.29
0.80 % Er	Yakovenchukite-(Y) !	K3NaCaY2(Si12O30)·4H2O	1,256.79
4.44 % Er	Yftisite-(Y) ?	(Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6	753.13

( Bold - Valid Mineral Name)
(* - Mineral Name is Not IMA Approved)
(! - New Dana Classification Number Has Been Changed or Added)
(? - IMA Discredited Mineral Species Name)
(# - Grandfathered as valid)