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| CAS Number | |
| 3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.031.711 
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| PubChem CID | |
| CompTox Dashboard (EPA) | |
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| Properties | |
| Chemical formula | TmSe |
| Molar mass | 247.89 |
| Density | 9.1 g/cm |
| Melting point | 2,060 °C (3,740 °F; 2,330 K) |
| Related compounds | |
| Other anions | TmS TmTe |
| Other cations | ErSe YbSe |
| Related compounds | Tm2Se3 |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references | |
Thulium monoselenide is a mixed valence compound of selenium and thulium with the chemical formula TmSe.
Preparation
Thulium monoselenide can be prepared by directly reacting thulium and selenium:
- Tm + Se → TmSe
Properties
Thulium monoselenide forms reddish-brown cubic crystals, space group Fm3m, unit cell parameters a = 0.5640 nm, Z = 4, and a structure similar to that of sodium chloride.
The compound melts congruently at 2060 °C, and at 1100 °C and 1730 °C, phase transitions occur in the compound. The Néel temperature of thulium monoselenide is 1.85–2.8 K.
References
- Kaindl, G.; Brewer, W. D.; Kalkowski, G.; Holtzberg, F. (1983-11-28). "$M$-Edge X-Ray Absorption Spectroscopy: A New Tool for Dilute Mixed-Valent Materials". Physical Review Letters. 51 (22): 2056–2059. doi:10.1103/PhysRevLett.51.2056.
- ^ Bucher, E.; Andres, K.; di Salvo, F. J.; Maita, J. P.; Gossard, A. C.; Cooper, A. S.; Hull, G. W. (1975-01-01). "Magnetic and some thermal properties of chalcogenides of Pr and Tm and a few other rare earths". Physical Review B. 11 (1): 500–513. Bibcode:1975PhRvB..11..500B. doi:10.1103/PhysRevB.11.500.
- Predel, B. (1998), "Se-Tm (Selenium-Thulium)", Pu-Re – Zn-Zr, Landolt-Börnstein - Group IV Physical Chemistry, vol. 5 J, Berlin/Heidelberg: Springer-Verlag, pp. 1–2, doi:10.1007/10551312_2721, ISBN 3-540-61742-6, retrieved 2024-01-22
- Diagrammy sostojanija dvojnych metalličeskich sistem: spravočnik v trech tomach. 3,2. Moskva: Mašinostroenie. 2001. ISBN 978-5-217-02932-7.
| Thulium compounds | |
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| Tm(II) | |
| Tm(III) | |
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