didymium

The name "didymium" continued to be used in the rare earth metal industry.

In 1885 von Welsbach used a method he developed himself to separate didymium for the first time.

He was right about lanthanum's being an element, but not about didymium.

The name "didymium" also lived on in mineralogical texts.

Didymium photographic filters are often used to enhance fall scenery by making leaves appear more vibrant.

During the period when didymium was believed to be an element, the symbol Di was used for it.

For example, there was a so-called "element" that was even given the chemical name of "didymium".

For example, Squamuloderma nullifila is actually a species from the genus Didymium.

In 1874, he concluded that didymium was in fact two elements, now known as neodymium and praseodymium.

In 1874, Per Teodor Cleve deduced that didymium was made up of at least two elements.

The name of "didymium" lived on in untruncated version, partly due to the use in glassblower's goggles.

The usefulness of didymium glass for eye protection of this sort was discovered by Sir William Crookes.

Didymium had not been difficult to find, since it was providing the pinkish tinge to the salts of ceria when in trivalent form.

There were no further discoveries for 30 years, and the element didymium was listed in the periodic table of elements with a molecular mass of 138.

Praseodymium-doped glass, called didymium glass, turns yellow and is used in welding goggles because it blocks infrared radiation.

So in 1842 the number of rare earth elements had reached six: yttrium, cerium, lanthanum, didymium, erbium and terbium.

Neodymium always dominates, which is why it got the "neo" appellation, being responsible for most of the color of the old didymium in its salts.

The remaining less-basic rare earth(s) retained the pinkish color, and Mosander called this remaining fraction "didymium."

During the First World War, didymium glass was reportedly used to transmit Morse Code across battlefields.

(The basicity methods were only suitable for lanthanum purification; didymium could not be efficiently further separated in this manner.)

The rare earth mixture didymium, previously believed to be an element, partially consists of neodymium(III) oxide.

The "Sodium Vapor Process" used in motion picture matte work included a didymium filtering prism in the camera.

Didymium wildpretii is a species of slime mold which feeds on the decaying remains of various species of cacti.

Praseodymium is a component of didymium glass, which is used to make certain types of welder's and glass blower's goggles.

It has been shown to be polyphyletic, and the species formerly contained in it have been divided among the genera Physarum, Stemonitis and Didymium.