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The Element Samarium

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Definition of the Samarium Element
A silvery or pale gray metallic rare-earth element found in monazite and bastnaesite and used as a dopant for laser materials, in infrared absorbing glass, and as a neutron absorber in certain nuclear reactors. Samarium is relatively stable at room temperature in dry air, but it ignites when heated above 150 C and forms an oxide coating in moist air. The Atomic Number of this element is 62 and the Element Symbol is Sm.

The Properties of the Samarium Element
Symbol: Sm
Atomic Number: 62
Atomic Mass: 150.36 amu
Melting Point: 1072.0 C - 1345.15 K
Boiling Point: 1900.0 C - 2173.15 K
Number of Protons/Electrons: 62
Number of Neutrons: 88
Crystal Structure: Rhombohedral
Density @ 293 K: 7.54 g/cm3
Color: silver

Origin / Meaning of the name Samarium
It was named after a Russian mine official called Colonel Samarski.

Periodic Table Group and Classification of the of the Samarium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Samarium is classified as an element in the Lanthanide series as one of the "Rare Earth Elements" which can located in Group 3 elements of the Periodic Table and in the 6th and 7th periods. The Rare Earth Elements are divided into the Lanthanide and Actinide series. The elements in the Lanthanide series closely resemble lanthanum, and one another, in their chemical and physical properties. Their compounds are used as catalysts in the production of petroleum and synthetic products. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

Facts about the Discovery and History of the Samarium Element
Samarium was discovered by Jean Charles Galissard de Marignac in Switzerland in 1853. It was isolated in France in 1879 by the French chemist Paul Emile Lecoq de Boisbaudran.

Occurrence of the Samarium Element
Found in monazite and bastnaesite

Abundances of the element in different environments
% in Universe 510-7%
% in Sun 110-7%
% in Meteorites 0.000017%
% in Earth's Crust 0.0006%
% in Oceans 4.510-11%
% in Humans N/A

Associated Uses of Samarium
Carbon-arc lighting
Neutron absorber in nuclear reactors
Optical lasers
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