Name:
Lanthanum
Symbol:
La
Atomic Number:
57
Atomic Mass:
138.91
Atomic Volume:
22.54 cc/mol
Discovered By:
Mosander
Discovery Date:
1839
Origin of Name:
Lanthanum - (Greek) lanthanein (to lie hidden)
Toxicity:
Compounds are apparently toxic, but have not been studied adequately.
Summary:
Not found free in nature. Lanthanum oxidizes easily in air and hot water. Lanthanum is used to make the alloy "misch metal" used in lighter flints.
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