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The Element Gadolinium


"The Atom"

Definition of the Gadolinium Element
A silvery-white, malleable, ductile, metallic rare-earth element obtained from monazite and bastnaesite and used in improving high-temperature characteristics of Iron, Chromium, and related alloys. The metal does not tarnish in dry air but an oxide film forms in moist air. Gadolinium reacts slowly with water and dissolves in acids. The Atomic Number of this element is 64 and the Element Symbol is Gd.

The Properties of the Gadolinium Element
Symbol: Gd
Atomic Number: 64
Atomic Mass: 157.25 amu
Melting Point: 1311.0 C - 1584.15 K
Boiling Point: 3233.0 C - 3506.15 K
Number of Protons/Electrons: 64
Number of Neutrons: 93
Crystal Structure: Hexagonal
Density @ 293 K: 7.895 g/cm3
Color: silvery-white

Origin / Meaning of the name Gadolinium
Gadolinium is named after the Finnish chemist and geologist Johan Gadolin.

Periodic Table Group and Classification of the of the Gadolinium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Gadolinium 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 Gadolinium Element
Gadolinium was discovered by Jean de Marignac in France in 1880.

History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.

Occurrence of the Gadolinium Element
Gadolinium also has the highest thermal neutron capture cross-section of any known element
Never found in nature as the free element
Contained in many minerals such as monazite, gadolinite, and bastnasite

Abundances of the element in different environments
% in Universe 210-7%
% in Sun 210-7%
% in Meteorites 0.000023%
% in Earth's Crust 0.00052%
% in Oceans 710-11%
% in Humans N/A

Associated Uses of Gadolinium
Gadolinium yttrium garnets
Phosphors for colour TV tubes
Compact discs
Computer memory

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