Holmium(III) oxide

Holmium(III) oxide
Samples of holmium(III) oxide under ambient light, and trichromatic light
Names
IUPAC name
Holmium(III) oxide
Other names
Holmium oxide, Holmia
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.820 Edit this at Wikidata
EC Number
  • 235-015-3
UNII
  • InChI=1S/2Ho.3O checkY
    Key: JYTUFVYWTIKZGR-UHFFFAOYSA-N checkY
  • InChI=1/2Ho.3O/rHo2O3/c3-1-5-2-4
    Key: JYTUFVYWTIKZGR-VLHOCPAZAL
  • [O][Ho]O[Ho][O]
  • O=[Ho]O[Ho]=O
Properties
Ho2O3
Molar mass 377.858 g·mol−1
Appearance Pale yellow, opaque powder.
Density 8.41 g cm−3
Melting point 2,415 °C (4,379 °F; 2,688 K)
Boiling point 3,900 °C (7,050 °F; 4,170 K)
Band gap 5.3 eV [1]
+88,100·10−6 cm3/mol
1.8 [1]
Structure
Cubic, cI80
Ia-3, No. 206
Thermochemistry
115.0 J mol−1 K−1
158.2 J mol−1 K−1
-1880.7 kJ mol−1
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Warning
H319, H410
P264, P273, P280, P305+P351+P338, P337+P313, P391, P501
Safety data sheet (SDS) External MSDS
Related compounds
Other anions
Holmium(III) chloride
Other cations
Dysprosium(III) oxide
Erbium(III) oxide
Related compounds
Bismuth(III) oxide

Europium(III) oxide
Gold(III) oxide
Lanthanum(III) oxide
Lutetium(III) oxide
Praseodymium(III) oxide
Promethium(III) oxide
Terbium(III) oxide
Thallium(III) oxide
Thulium(III) oxide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Holmium(III) oxide, or holmium oxide is a chemical compound of the rare-earth element holmium and oxygen with the formula Ho2O3. Together with dysprosium(III) oxide (Dy2O3), holmium oxide is one of the most powerfully paramagnetic substances known. The oxide, also called holmia, occurs as a component of the related erbium oxide mineral called erbia. Typically, the oxides of the trivalent lanthanides coexist in nature, and separation of these components requires specialized methods. Holmium oxide is used in making specialty colored glasses. Glass containing holmium oxide and holmium oxide solutions have a series of sharp optical absorption peaks in the visible spectral range. They are therefore traditionally used as a convenient calibration standard for optical spectrophotometers.

  1. ^ a b Wiktorczyk, T (2002). "Preparation and optical properties of holmium oxide thin films". Thin Solid Films. 405 (1–2): 238–242. Bibcode:2002TSF...405..238W. doi:10.1016/S0040-6090(01)01760-6.