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Holmium Oxide structure
Holmium Oxide structure

Holmium Oxide

Iupac Name:holmium(3+);oxygen(2-)
CAS No.:12055-62-8
Molecular Weight:377.86
Introduction: Holmium oxide occurs in nature, usually associated with small quantitiesof other rare-earth oxides. Commercial applications of this compound have notbeen explored fully. It is used in refractories and as a catalyst. Characteristicspectral emission lines of holmium oxide glass are used to calibrate spectrophotometers. View more+
1. Names and Identifiers
1.1 Name
Holmium Oxide
1.2 Synonyms

EINECS 235-015-3 HOLMIUM(+3)OXIDE HOLMIUM(III) OXIDE Holmium(III) oxide, REacton (REO) MFCD00011053 UV-VIS STANDARD 6 UV-VIS STANDARD 6: HOLMIUM OXIDE SOLUTION

1.3 CAS No.
12055-62-8
1.4 EINECS(EC#)
235-015-3
1.5 Molecular Formula
Ho2O3 (isomer)
1.6 Inchi
InChI=1S/2Ho.3O/q2*+3;3*-2
1.7 InChkey
OWCYYNSBGXMRQN-UHFFFAOYSA-N
1.8 Canonical Smiles
[O-2].[O-2].[O-2].[Ho+3].[Ho+3]
1.9 Isomers Smiles
[O].[Ho]
2. Properties
3.1 Density
1.0966 g/mL at 25 °C
3.1 Melting point
>100 °C(lit.)
3.1 Precise Quality
377.84500
3.1 PSA
43.37000
3.1 logP
-0.35640
3.1 Appearance
Light yellow-orange to beigenanopowder
3.2 Chemical Properties
Holmium oxide (Ho2O3), also known as Holmia, is a light yellow powder that is one of the most paramagnetic substances known.
3.3 Color/Form
Light yellow-orange to beige
3.4 Water Solubility
Insoluble in water. Soluble in perchloric acids.
3.5 Stability
Stable, but may be air or moisture sensitive. Incompatible with strong acids.
3.6 StorageTemp
no restrictions.
3. Use and Manufacturing
4.1 Storage
Ambient temperatures.
4.2 Usage
Holmium(III) oxide acts as colorants which is used for cubic zirconia and glass, as a calibration standard for optical spectrophotometers, as a specialty catalyst, phosphor and a laser material.Holmium Oxide, also called Holmia, has specialized uses in ceramics, glass, phosphors and metal halide lamp, and dopant to garnet laser. Holmium can absorb fission-bred neutrons, it is also used in nuclear reactors to keep atomic chain reaction from running out of control. Holmium Oxide is one of the colorants used for cubic zirconia and glass, providing yellow or red coloring.It is also used in Yttrium-Aluminum-Garnet (YAG) and Yttrium-Lanthanum-Fluoride (YLF) solid-state lasers found in microwave equipment (which are in turn found in a variety of medical and dental settings).
4. Safety and Handling
5.1 Risk Statements
S22-S24/25
5.1 Safety Statements
22-24/25
5.1 RIDADR
NONH for all modes of transport
5.1 WGK Germany
3
5. MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Not classified.

2.2 GHS label elements, including precautionary statements

Pictogram(s) No symbol.
Signal word

No signal word.

Hazard statement(s)

none

Precautionary statement(s)
Prevention

none

Response

none

Storage

none

Disposal

none

2.3 Other hazards which do not result in classification

none

6. Other Information
6.0 Chemical Properties
Holmium oxide (Ho2O3), also known as Holmia, is a light yellow powder that is one of the most paramagnetic substances known.
Holmium oxide
Holmium oxide glass has been used as a wavelength standard for over four decades. It has a number of desirable features that have made it a commonly used wavelength standard. It does not induce a slit positioning error as atomic emission lamps may. It is also compact, easy to use, and most importantly, stable over long periods of time.the use of filters made of holmium oxide glass allows the calibration of wavelength for a spectrophotometer over a broad range.
6.1 Physical properties
Yellow cubic crystal; density 8.41 g.cm3; melts at 2,415°C; insoluble in water; dissolves in acids (with reactions).
6.2 Usage
Holmium(III) oxide iacts as colorants which is used for cubic zirconia and glass, as a calibration standard for optical spectrophotometers, as a specialty catalyst, phosphor and a laser material.
6.3 Merck
14,4727
6.4 Description
Holmium oxide occurs in nature, usually associated with small quantities of other rare-earth oxides. Commercial applications of this compound have not been explored fully. It is used in refractories and as a catalyst. Characteristic spectral emission lines of holmium oxide glass are used to calibrate spectrophotometers.
6.5 Uses
Holmium(III) oxide acts as colorants which is used for cubic zirconia and glass, as a calibration standard for optical spectrophotometers, as a specialty catalyst, phosphor and a laser material.
Holmium Oxide, also called Holmia, has specialized uses in ceramics, glass, phosphors and metal halide lamp, and dopant to garnet laser. Holmium can absorb fission-bred neutrons, it is also used in nuclear reactors to keep atomic chain reaction from running out of control. Holmium Oxide is one of the colorants used for cubic zirconia and glass, providing yellow or red coloring.
It is also used in Yttrium-Aluminum-Garnet (YAG) and Yttrium-Lanthanum-Fluoride (YLF) solid-state lasers found in microwave equipment (which are in turn found in a variety of medical and dental settings).
6.6 Chemical Properties
slightly beige solid
6.7 Uses
Refractories, special catalyst.
7. Computational chemical data
  • Molecular Weight:377.86g/mol
  • Molecular Formula:Ho2O3
  • Compound Is Canonicalized:True
  • Exact Mass:377.845
  • Monoisotopic Mass:377.845
  • Complexity:0
  • Rotatable Bond Count:0
  • Hydrogen Bond Donor Count:0
  • Hydrogen Bond Acceptor Count:3
  • Topological Polar Surface Area:3A^2
  • Heavy Atom Count:5
  • Defined Atom Stereocenter Count:0
  • Undefined Atom Stereocenter Count:0
  • Defined Bond Stereocenter Count:0
  • Undefined Bond Stereocenter Count:0
  • Isotope Atom Count:0
  • Covalently-Bonded Unit Count:5
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