Later he became involved in the research of the rare earth elements.

China was already a world leader in certain areas such as rare earth elements.

Is the domestic production of rare earth elements essential to American economic and national security interests?

Separation of the rare earth elements is a step in the later processing.

In the original draft of the book I had three chapters on the rare earth elements.

Finding rare earth elements is only the first and some argue the easiest step.

However, most rare earth elements are not found in concentrated or pure forms.

His chief work, however, was in spectroscopy and its application to rare earth elements.

The Lanthanides (also called the rare earth elements) are part of this period.

Rare earth elements are, of course, rare on the market, but not in the ground.

Because all lanthanides are close in size, the rare earth elements have always been hard to separate.

We need suggestions from the Commission regarding raw materials and rare earth elements.

They are mainly monopolists and can set their own conditions, as was the case with the rare earth elements.

Q. You've also expressed some ardor for the rare earth elements.

Mischmetal is used in the preparation of virtually all rare earth elements.

Rare earth elements change through time in small quantities (ppm, parts per million).

The dwindling supply of rare earth elements makes the need for better recycling practices very important.

The rare earth elements are often found together.

China has two state research facilities which provide specialist research into rare earth elements.

The rare earth elements are magnetic because their 4f shells are not full.

Euxenite is used as an ore of the rare earth elements it contains.

We need to switch to other business models, in order to recover rare earth elements for recycling wherever possible.

Atoms of rare earth elements can retain high magnetic moments in the solid state.

Rare earth elements patterns may also be used.

Carbon arc lamps use a mixture of rare earth elements to improve the light quality.