Mineral Species containing Holmium (Ho)

Element Properties, Isotopic Compositions for Holmium

**Holmium (Ho) Element Properties**
Atomic Mass	164.93032
Atomic Number	67
Name Origins	Latin, Holinia = "Stockholm."
Year Discovered	1878
Discovery Credits	Discovered by P. T. Cleve at Uppsala, Sweden and independenly by M. Delafontaine and J. L. Soret at Geneva, Switzerland.
Remarks	Silvery metal of the rare earth group. Slowly attacked by oxygen and water, dissolves in acid. Used as flux concentrator for high magnetic fields. Diagnostic tests: There are no simple diagnostic tests to identify holmium. 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 %
Ho	164.930319	165	67	100.0000%		Stable

Holmium (Ho) Minerals sorted by Descending Weight Percent

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**6 Minerals containing Holmium (Ho) sorted by Descending Weight Percent**
% Ho	Mineral Name	Chemical Formula	MW
2.28 % Ho	Decrespignyite-(Y) !	(Y,REE)4Cu(CO3)4Cl(OH)5·2(H2O)	867.49
1.14 % Ho	Hingganite-(Y)	Y2([ ])Be2Si2O8(OH)2	433.65
0.55 % Ho	Moskvinite-(Y) !	Na2K(Y,REE) [Si6O15]	598.41
0.53 % Ho	Samarskite-(Yb) !	(Yb,Y,REE,U,Th,Ca,Fe++) (Nb,Ta,Ti)O4	312.29
0.53 % Ho	Iwashiroite-(Y) !	YTaO4	313.16
0.19 % Ho	Chukhrovite-(Nd) !	Ca3(Nd,Y)Al2(SO4)F13·12(H2O)	857.24

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(* - Mineral Name is Not IMA Approved)
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(? - IMA Discredited Mineral Species Name)
(# - Grandfathered as valid)