samarium
Noun
Meaning
A rare metallic element of doubtful identity.
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Also, thin films of samarium obtained by vapor deposition may contain the hcp or dhcp phases at ambient conditions.
Contrary to cyclopentadienides of most other lanthanides, in Sm(C 5 H 5 ) 3 some C 5 H 5 rings bridge each other by forming ring vertexes η 1 or edges η 2 toward another neighboring samarium atom, thereby creating polymeric chains.
ISBN 0-8018-6784-3 In this sense samarium was the first chemical element to be named after a person.
For example, the cross section of samarium-151 is 15,000 barns, it is on the order of hundreds of barns for 150 Sm, 152 Sm, and 153 Sm, and is 6,800 barns for natural (mixed-isotope) samarium.
At ambient conditions, samarium normally assumes a rhombohedral structure (α form).
Domination of samarium in minerals is unique.