There are two series of rare earth metals, the lanthanides and the actinides.

They could not yet produce pure samples of all the rare earth elements, even in the form of their salts, and in some cases they were unable to distinguish between mixtures of two very similar (adjacent) rare earth elements from the nearby pure metals in the Periodic Table.

Rare earth mines are found throughout the world.

Most contaminants are coliform bacteria and faecal streptococcus, and among chemical ones, there are ammonia, nitrates, nitrites, rare heavy metals and other toxic agents.

Indeed, rare earth elements are rare only in the sense that they are distributed in small quantities and must be extracted from ores, a time consuming process.

This has tended to increase metals prices, fueling Australia s large export surplus in metals.

So, in 2000 we wrote Rare Earth. In 2003, we then asked, let's not think about where Earths are in space, but how long has Earth been Earth?

What if we were to separate out metals from waste streams, small amounts of metals in water? That's what microbes do they chelate metals out of water.

China dominates the global market simply because it has fairly abundant rare earth ores close to the surface.

Mail has applications in sculpture and jewellery, especially when made out of precious metals or colourful anodized metals.

It's rare that history comes with a man that his fear is set in the hearts of kings all around earth.

And they extract the metals by hand.

The rare earth threat is not confined to Japan, as China accounts for over 90 of the world s production, roughly 120,000 tons.

Carl Sagan and Frank Drake, for instance, could well be considered pluralists while proponents of the Rare Earth hypothesis are modern skeptics.

Also, the method of separating the rare earth elements by the method of ion exchange had not been invented yet in Moseley's time.

These rocks have low concentrations of large ion lithophile elements (LILE), light rare earth elements (LREE), volatile elements and other highly incompatible elements.

And India s government has shown its political savvy by forging an agreement to provide Japan with rare earth minerals a vital component in many manufacturing processes after China chose to use its supplies of rare earths as a diplomatic stick.

Other countries might worry about the health risk to workers in rare earth processing, but that does not appear to be true of China.

Rare earth elements change through time in small quantities (ppm, parts per million), so their proportion can be used for geochronology and dating fossils.

Period 2 only has two metals (lithium and beryllium), making it the least metallic period (period 1 has no metals, but as mentioned above, only has two elements, so it would be impossible to have more metals) and the most nonmetals, with four.

Before the invention of coins, commerce depended on precious metals.

Brave leadership is rare.

A rare Persian Leopard.

From Rare Book Room.

This is very rare.

These instances are rare.

Rare earth ores in southern China all except for those in Inner Mongolia contain radioactive substances that pose significant threats to human health and the environment.

Most rare elements on Earth are not needed by life (exceptions being selenium and iodine), while a few common ones (aluminum and titanium) are not used.

It's mostly many types of plastics and many types of metals.

To separate the metals, they must first be brought into solution.

These catalysts must be highly active, stable, and, for global scalability, composed of earth abundant elements, such as iron, nickel, or cobalt, not the scarce metals now used, such as ruthenium or iridium.

Political violence has been rare.

These are not rare occurrences.

Heavy metals in wine controversy In 2008, researchers from Kingston University in London discovered red wine to contain high levels of toxic metals relative to other beverages in the sample.

In the face of aggressive price cutting by Chinese rare earth producers, many mines in the US and elsewhere in the world were shut down over the years.

Many countries are now planning to develop their own or alternative sources of rare earth elements, and to accelerate efforts to develop technologies that are free of them.

The waste is separated into recyclable materials (plastics, metals) and organic waste.

He is known for his work on the chemistry of platinum metals.

Copper, nickel, and other metals are also common, but in lower denominations.

resulting from surface treatment of metals and plastics (Y17) (decision VII 15)

If EID s were rare, management through crisis response might be cost effective. But EID s are not rare at all.

Big speculative bubbles are rare events.

Real debt defaults are historically rare.

The smile was rare and constrained.

But we have a rare quality.