Mineral Species containing Terbium (Tb)

Element Properties, Isotopic Compositions for Terbium

**Terbium (Tb) Element Properties**
Atomic Mass	158.92534
Atomic Number	65
Name Origins	Named after Ytterby, Sweden.
Year Discovered	1843
Discovery Credits	Discovered by C. G. Mosander at Stockholm, Sweden.
Remarks	Silvery white metal, rare member of the lanthanide (rare earth) group. Slowly oxidized by air, reacts with cold water, Used in solid state devices and lasers. Diagnostic tests: There are no simple diagnostic tests to identify Terbium. 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	Half-life Units	Decay Mode	Decay Mode MeV	Decay Mode %
Tb	158.925342	159	65	100.0000%		Stable
Tb	159.927163	160	65	0.0000%	72.4	Days	beta -	1.834	100.00%

Terbium (Tb) Minerals sorted by Descending Weight Percent

Click here for List sorted by Mineral Name

**5 Minerals containing Terbium (Tb) sorted by Descending Weight Percent**
% Tb	Mineral Name	Chemical Formula	MW
0.37 % Tb	Hingganite-(Y)	Y2([ ])Be2Si2O8(OH)2	433.65
0.37 % Tb	Decrespignyite-(Y) !	(Y,REE)4Cu(CO3)4Cl(OH)5·2(H2O)	867.49
0.27 % Tb	Moskvinite-(Y) !	Na2K(Y,REE) [Si6O15]	598.41
0.25 % Tb	Samarskite-(Yb) !	(Yb,Y,REE,U,Th,Ca,Fe++) (Nb,Ta,Ti)O4	312.29
0.11 % Tb	Lepersonnite-(Gd)	CaGd2(UO3)24(CO3)8(SiO4)4O4·60(H2O)	8,909.01

( 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)