67 164.930
Ho
Holmium

Holmium , Ho

Holmium is a chemical element with the symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a relatively soft and malleable silvery-white metallic element, which is stable in dry air at room temperature. A rare earth metal, it is found in the minerals monazite and gadolinite.

 

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Form

H2-5001-M
Ho Pieces <10mm TREM 99.5% Ho/TREM: 99.95%HolmiumPacked under Argon
H2-5003-M
HoF3 Pieces 3-6mm pieces 99.9% PureHolmium Fluoride
H2-5005-M
Ho2O3 Pieces 3-12mm 99.9% PureHolmium Oxide
H2-10003-P
HoCl3-xH2O -4 Mesh 99.9% PureHolmium Chloride
H2-10004-P
HoCl3 -20 Mesh 99.9% PureHolmium Chloride
H2-10005-P
HoF3 -60 Mesh (melted) 99.9% PureHolmium Fluoride
H2-10006-P
HoF3 -325 Mesh (precipitated) 99.9% PureHolmium Fluoride
H2-10008-P
HoN -60 Mesh 99.9% PureHolmium Nitride
H2-10009-P
Ho2O3 -325 Mesh (typ. =5 microns) 99.999% PureHolmium Oxide
H2-10010-P
Ho2O3 -325 Mesh (typ. =5 microns) 99.9% PureHolmium Oxide
H2-10011-P
Ho2S3 -200 Mesh 99.9% PureHolmium Sulphide
H2-10012-P
HoTe -20 Mesh 99.9% PureHolmium Telluride
H2-10013-P
Ho2O3 D50: <30 um Ho2O3/TREM:99.9%Holmium Oxide
H2-2000-R

Ho Rod 6.35mm diameter 99.9% Pure

Holmium

H2-2000-R1
Ho Rod 6.35mm dia. x 50mm long 99.9% PureHolmium
HO-SHT-0.5

Ho Sheet Thickness 0.5mm (0.020")

Purity 99.9%, Holmium

HO-SHT-0.76

Ho Sheet Thickness 0.76mm (0.030")

Purity 99.9%, Holmium

HO-SHT-1

Ho Sheet Thickness 1.0mm (0.040")

Purity 99.9%, Holmium

H2-9000-D

Holmium Ho,

Purity TREM 99.5%, Ho/TREM 99.9%

H2-9000-Dx

Holmium Ho,

Purity TREM 99.5%, Ho/TREM 99.95%

H2-9001-D

Holmium oxide Ho2O3, Purity 99.9%

HO-F-0.1

Ho Foil Thickness 0.1mm (0.004") Purity 99.9%

Holmium

HO-F-0.2

Ho Foil Thickness 0.2mm (0.008") Purity 99.9%

Holmium

H2-9001-D1
Ho2O3 TRG 25.4mm dia. x 3.18mm Tk 99.9% PureHolmium Oxide
HO-ST-4-3-3N5
Ho TRG 101.60mm dia. x 3mm TkTREM 99.5% Ho/TREM 99.95%Holmium

A trivalent metallic rare earth element, holmium has the highest magnetic moment (10.6µB) of any naturally-occurring element and possesses other unusual magnetic properties. When combined with yttrium, it forms highly magnetic compounds.

Holmium is a relatively soft and malleable element that is fairly corrosion-resistant and stable in dry air at standard temperature and pressure. In moist air and at higher temperatures, however, it quickly oxidizes, forming a yellowish oxide. In pure form, holmium possesses a metallic, bright silvery luster. Holmium oxide has some fairly dramatic color changes depending on the lighting conditions. In daylight, it is a tannish yellow color. Under trichromatic light, it is a fiery orange red, almost indistinguishable from the way erbium oxide looks under this same lighting. This has to do with the sharp emission bands of the phosphors, and the absorption bands of both oxides.

Symbol Ho
Atomic Number 67
No. of naturally occurring isotopes 1
Atomic weight 164.9304
Outer electron configuration 4f116s2
Metal radius (6-coordinate)/pm 176.2
Ionic radius(6-coordinate)/pm III 90.1
Ionization energy/kJmolI 574
Ionization energy/kJmolII 1139
Ionization energy/kJmolIII 2221
Density (25°C)/gcm3 8.78
Melting point / °C 1461
Boiling point / °C -2600
ΔHfus/kJmol-1
ΔHvap/kJmol-1 280
ΔHf(monoatomic gas)/kJmol-1 301
ΔH (hydration Ln3+)/kJmol1 3667
Electrical resistivity
(25°C)/jiohm cm 94
Eo(M3+(aq)+ 3e- →M(s))/V
Temperature (oC) @Vap. Pressure
10-8 Torr 650 Sublimes
10-6 Torr 770 Sublimes
10-4 Torr 950 Sublimes
Techniques
Electron Beam Good
Crucible -
Coil Tungsten
Boat Tungsten & Tantalum
Remarks
-