Holmium (III) Oxide (Ho<sub>2</sub>O<sub>3</sub>) 99.99% 4N Powder,  MSE Supplies

MSE PRO Holmium (III) Oxide (Ho2O3) 99.99% 4N Powder

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Holmium (III) Oxide, Ho2O3, 99.99% 4N High Purity Powder

  • Product Number: PO3001 (50 g), PO3002 (100 g), PO3004 (500g) PO3003 (1 kg)
  • Formula: Ho2O3
  • CAS Number: 12055-62-8
  • Molecular Weight: 377.86  g/mol
  • Density: 8.41 g/cm³ at 25°C
  • Melting Point: 2415°C
  • Color: pale yellow powder
  • Solubility: Insoluble in water.
  • Purity: 99.99% 4N (Ho2O3/TREO*), Total Rare Earth Oxide (TREO) > 99.7%
* TREO - Total Rare Earth Oxides


    Holmium(III) oxide, Ho2O3 is one of the colorants used for cubic zirconia and glass, providing yellow or red coloring. Glass containing holmium oxide and holmium oxide solutions (usually in perchloric acid) have sharp optical absorption peaks in the spectral range 200-900 nm. They are therefore used as a calibration standard for optical spectrophotometers and are available commercially. As most other oxides of rare-earth elements, holmium oxide is used as a specialty catalyst, phosphor and a laser material. Holmium laser operates at wavelength of about 2.08 micrometres, either in pulsed or continuous regime. This laser is eye safe and is used in medicine, lidars, wind velocity measurements and atmosphere monitoring.

    Notes: More detailed product information including SDS, certificate of analysis (COA), lead time and volume pricing are available upon request. 

    Rare Earth Impurities Content (ppm)

    Non- Rare Earth Impurities Content (ppm)

    Gd2OEu2OSm2ONd2OPr6O11 La2O3 CeO2   

    Total <10.0

    Fe2O3   <5.0

     Tb4O7   <10.0

    SiO2   <30.0

     Dy2O3   <20.0

    CaO    <20.0

     Er2O3   <20.0

    Cl-   <200.0

     Tm2O3   <10.0

    Na2O <20.0

     Yb2O3   <10.0

    Others <10.0

     Lu2O3   <10.0

     Y2O3   <10.0



    Magneto-optical characteristics of holmium oxide (Ho2O3) ceramics. H. Furuse, and R. Yasuhara. Optical Materials Express Vol. 7(3), Pgs. 827-833, 2017.

    Faraday effect measurements of holmium oxide (Ho2O3) ceramics-based magneto-optical materials. D. Vojna, R. Yasuhara, H. Furuse, O.Slezak, S. Hutchinson, A. Lucianetti, T. Mocek, and M. CechHigh Power Lasers and Engineering Vol. 6(2), 2018. 

    Optical and Physical Investigations of Lanthanum Bismuth Borate glasses doped with Ho2O3. P. Ramesh, G. Jagannath, B. Eraiah, and M.K. Kokila. IOP Conference Series: Materials Science and Engineering Vol. 310, 2018.