Lanthanum(III) sulfide is a binary inorganic chemical compound of lanthanum metal and sulfur with the chemical formula La2S3.[2][3][4]
Lanthanum(III) sulfide can be prepared from the effect of sulfur vapor on metallic lanthanum:
It can also be prepared from the effect of hydrogen sulfide on lanthanum:
The effect of hydrogen sulfide on lanthanum oxide in the presence of reducing agents also produces lanthanum(III) sulfide:
Dilanthanum trisulfide forms reddish-yellow crystals of the cubic system, with space group I43d, and unit cell parameters a = 0.8706 nm.[5]
It does not dissolve in cold water.
La2S3 is used as a precursor to prepare complex compounds. It is also used in glass manufacturing and in optical fibers.[6]
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