Thulium monoselenide

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Thulium monoselenide
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.031.711 Edit this at Wikidata
EC Number
  • 234-896-1
  • InChI=1S/Se.Tm
    Key: GFKHZESYKBWHEV-UHFFFAOYSA-N
SMILES
  • [Se]=[Tm]
Properties
TmSe
Molar mass 247.89
Density 9.1 g/cm3
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 [77 °F], 100 kPa).

Thulium monoselenide is a mixed valence[1] compound of selenium and thulium with the chemical formula TmSe.

Preparation

Thulium monoselenide can be prepared by directly reacting thulium and selenium:[2]

Tm + Se → TmSe

Properties

Thulium monoselenide forms reddish-brown cubic crystals,[2] space group Fm3m, unit cell parameters a = 0.5640 nm, Z = 4, and a structure similar to that of sodium chloride.[3][4][2]

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.[2]

References

  1. doi:10.1103/PhysRevLett.51.2056
    .
  2. ^
    doi:10.1103/PhysRevB.11.500
    .
  3. ISBN 3-540-61742-6
    , retrieved 2024-01-22
  4. ISBN 978-5-217-02932-7
    .
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