LANTHANOIDS

LANTHANOIDS C화학적 특성, 용도, 생산

정의

A group of elements whose electronic configurations display back filling of the 4f-level. There is a maximum of 14 electrons in an f-orbital. The element lanthanum itself has no f-electrons (La [Xe]5d¹6s²) and is thus strictly not a lanthanoid, but it is included by convention, thus giving a closely related series of 15 elements. Excluding lanthanum, the elements all have 4f^x6s² configurations but gadolinium and lutecium have an additional 5d1 electron.
The characteristic oxidation state is M³⁺ and the great similarity in the size of the ions leads to a very close similarity of chemical properties and hence to great difficulties of separation using conventional methods. Chromatographic and solvent solventextraction methods have been specially developed for the lanthanoids.

공업 용도

The lanthanoid series consists of 14 elements (cerium to lutetium) and they are also called f-block metals, as the valence shell of lanthanoids contains 4f orbitals. Lanthanoids are named after the element lanthanum (La), which itself is a d-block metal. Nevertheless, because of its very similar chemical behaviour, lanthanum is often also classified as a lanthanoid. The term rare earth metals describes the lanthanoid series together with lanthanum (La), scandium (Sc) and yttrium (Y).
Mostly, lanthanoids are used in the production of batteries, lasers and other technological devices. Some lanthanoids salts, such as the salts of lanthanum, cerium and gadolinium (highlighted in Figure 9.1), are increasingly used in a clinical setting, for example, as a phosphate binder in the treatment of renal osteodystrophy or as MRI (magnetic resonance imaging) contrast agents (CAs).

LANTHANOIDS 준비 용품 및 원자재

원자재

준비 용품

LANTHANOIDS 공급 업체

공급자	전화	이메일	국가	제품 수	이점