Lanthanum oxysulfide is an inorganic compound, a salt of lanthanum and hydrogen sulfide acid, with the formula La
2O
2S.[2][3]
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| Other names
lanthanum(3+); oxygen(2-); sulfide, lanthanum oxide sulfide, dilanthanum dioxide sulphide[1]
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| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.031.578 |
| EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| La 2O 2S | |
| Molar mass | 341.88 g/mol |
| Appearance | yellowish-white crystals |
| Density | 5.77 g/cm3 |
| Related compounds | |
Related compounds
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Gadolinium oxysulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis
edit- La2(SO4)3 + O2 → La2O3·SO3 + 2SO3
- The resulting product is reduced with hydrogen when heated:
- La2O3·SO3 + 4H2 → La2O2S + 4H2O
Physical properties
editThe compound forms yellowish-white hexagonal crystals.
Uses
editThe compound is used as a laser host material.[5]
References
edit- ^ "Lanthanum Oxysulfide | CAS 12031-43-5 | Lorad Chemical Corporation". Lorad Chemical. Retrieved 21 March 2023.
- ^ "CAS 12031-43-5 Lanthanum oxide sulfide(La2O2S) - Alfa Chemistry". Alfa Chemistry. Retrieved 21 March 2023.
- ^ "Lanthanum Oxysulfide". American Elements. Retrieved 21 March 2023.
- ^ Pitha, John J.; Smith, Arthur L.; Ward, Roland (1947). "The Preparation of Lanthanum Oxysulfide and its Properties as a Base Material for Phosphors Stimulated by Infrared". J. Am. Chem. Soc. 69 (8): 1870–1871. doi:10.1021/ja01200a009. Retrieved 21 March 2023.
- ^ Koechner, Walter (11 November 2013). Solid-State Laser Engineering. Springer Science+Business Media. p. 32. ISBN 978-3-662-14105-2. Retrieved 21 March 2023.