Didymium

The word didymium comes from a Greek word meaning "twin," because it was closely associated with the element lanthanium, both of which were found with cerium. ❋ Erin McKean (2011)

Instead it is targeting the mixture—also known as didymium—that is crucial in making magnets. ❋ Erin McKean (2011)

Japan is the world's top importer of the minerals, which have such names as lanthanum and didymium. ❋ Brendan Conway (2011)

Prices have increased after China, which controls about 95% of the world's rare-earth supply, said it would slash exports of the metals—such as lanthanum and didymium—by 35% this year. ❋ John Kell (2011)

Elemental Attraction didymium Yet it didn't pledge to underpin all rare-earth prices. ❋ Erin McKean (2011)

It produces rare-earth elements such as lanthanum and didymium. ❋ Unknown (2010)

Investing article about the IPO of Molycorp Inc. incorrectly said didymium is a rare-earth element. ❋ Unknown (2010)

Now if they could just make them to hold my lampwork didymium lenses- that could be so cool. ❋ Studio Marcy - Marcy Lamberson (2009)

This number coincides with the atomic volumes of zirconium (21.7), cerium (21.1), lanthanum (22.6), and didymium ❋ Various (N/A)

[Footnote 1: Has priority over niobium.] [Footnote 2: Now split into neo-and praseo-didymium.] [Footnote 3: Has priority over beryllium.] [Footnote 4: Standard, or basis of the system.] ***** ❋ Various (N/A)

Thus, transparent minerals which contain the rare element didymium betray the presence of that element as soon as they are viewed through a spectroscope by ordinary daylight; the spectrum is seen to be traversed by black bands in the green, which are quite characteristic. ❋ Various (N/A)

The separation of lanthanum and didymium in the solution from which the cerium has been precipitated is effected by precipitating them together as oxalates, igniting, and dissolving in dilute nitric acid. ❋ Cornelius Beringer (1886)

A subnitrate of didymium is formed, and remains as an insoluble residue on extracting with hot water. ❋ Cornelius Beringer (1886)

Cerium occurs as silicate (together with the oxides of lanthanum, didymium, iron and calcium) in the mineral cerite, which is its chief source. ❋ Cornelius Beringer (1886)

On treating with oxalic acid, cerium, lanthanum, and didymium are precipitated as oxalates, which on ignition are converted into oxides. ❋ Cornelius Beringer (1886)

Tokyo-based chemical maker Showa Denko has opened a plant in Vietnam to begin recycling dysprosium and didymium, rare earth metals used to strengthen magnets. ❋ Unknown (2011)

Under the new three-year deal, Molycorp will supply Hitachi with didymium metal and alloy, as well as lanthanum oxide. ❋ Unknown (2011)

Besides Hitachi's project, Tokyo-based chemical maker Showa Denko KK in May opened a plant in Vietnam to begin recycling dysprosium and didymium metal used to make magnetic alloys. ❋ Unknown (2010)