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

Applications

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)
Gd₂O₃Eu₂O₃Sm₂O₃Nd₂O₃Pr₆O₁₁ 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

References

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.