Lanthanum(III) sulfide is a binary inorganic chemical compound of lanthanum metal and sulfur with the chemical formula La2S3.[2][3]

Synthesis

Lanthanum(III) sulfide can be prepared from the effect of sulfur vapor on metallic lanthanum:

2 La + 3 S → La2S3

It can also be prepared from the effect of hydrogen sulfide on lanthanum:

2 La + 3H2S → La2S3 + 3 H2

The effect of hydrogen sulfide on lanthanum oxide in the presence of reducing agents also produces lanthanum(III) sulfide:

La2O3 + 3 H2S + 3 C → La2S3 + 3 CO2 + 3 H2

Physical properties

Dilanthanum trisulfide forms reddish-yellow crystals of the cubic system, with space group I43d, and unit cell parameters a = 0.8706 nm.[4]

It does not dissolve in cold water.

Chemical properties

  • Reacts with hot water:
La2S3 + 6 H2O → 2 La(OH)3 + 3 HS
  • Reacts with acids:
La2S3 + 3 HCl → 2 LaCl3 + 3 H2S
  • Oxidized by oxygen in atmosphere:
2 La2S3 + 9 O2 → 2 La2O3 + 6 SO2

Uses

La2S3 is used as a precursor to prepare complex compounds. It is also used in glass manufacturing and in optical fibers.[5]

References

  1. ^ "Lanthanum Sulfide". American Elements. Retrieved 27 July 2024.
  2. ^ "Lanthanum(III) sulfide | CAS 12031-49-1 | SCBT - Santa Cruz Biotechnology". scbt.com. Retrieved 27 July 2024.
  3. ^ Bouroushian, Mirtat (23 April 2010). Electrochemistry of Metal Chalcogenides. Springer Science & Business Media. p. 32. ISBN 978-3-642-03967-6. Retrieved 27 July 2024.
  4. ^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3548. ISBN 978-0-412-30120-9. Retrieved 27 July 2024.
  5. ^ "Lanthanum(III) sulfide, 99% (REO), Thermo Scientific Chemicals | Fisher Scientific". Fisher Scientific. Retrieved 27 July 2024.
Allikas: https://en.wikipedia.org/wiki/Lanthanum(III)_sulfide
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