{"id":280,"date":"2020-04-09T10:14:26","date_gmt":"2020-04-09T10:14:26","guid":{"rendered":"https:\/\/thechemicalelements.com\/?page_id=280"},"modified":"2023-08-15T13:29:24","modified_gmt":"2023-08-15T13:29:24","slug":"dysprosium","status":"publish","type":"post","link":"https:\/\/thechemicalelements.com\/dysprosium\/","title":{"rendered":"Dysprosium (Dy)"},"content":{"rendered":"\n

Dysprosium is a chemical element with an atomic number of 66 in the periodic table of elements. It\u2019s one of the more abundant lanthanide elements found in Earth\u2019s crust, in a concentration of 3 parts per million. Still, it never occurs in its free elemental form. <\/span><\/p>\n\n\n\n

Classified in the heavy rare-earth elements group (HREE), this soft metal has two valence electrons that enable dysprosium to detect radiation and display high magnetic susceptibility.\u00a0<\/span><\/p>\n\n\n\n

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Chemical and Physical Properties of Dysprosium<\/span><\/h3>\n\n\n\n
Property<\/strong><\/td>Value<\/strong><\/td><\/tr>
Symbol<\/td>Dy<\/td><\/tr>
Atomic number<\/td>66<\/td><\/tr>
Atomic weight (mass)<\/td>162.50 g.mol-1<\/td><\/tr>
Group (number)<\/td>Lanthanides<\/td><\/tr>
Period<\/td>6<\/td><\/tr>
Color<\/td>A lustrous silvery metal<\/td><\/tr>
Physical state<\/td>Solid at room temperature of 20\u00b0C<\/td><\/tr>
Half-life<\/td>From less than 30 seconds to 144.4 days<\/td><\/tr>
Electronegativity according to Pauling<\/td>1.2<\/td><\/tr>
Density<\/td>8.55 g\/cm\u22123<\/td><\/tr>
Melting point<\/td>1412\u00b0C, 2574\u00b0F, 1685 K<\/td><\/tr>
Boiling point<\/td>2567\u00b0C, 4653\u00b0F, 2840 K<\/td><\/tr>
Van der Waals radius<\/td>175 pm<\/td><\/tr>
Ionic radius<\/td>N\/A<\/td><\/tr>
Isotopes<\/td>7<\/td><\/tr>
Most characteristic isotope<\/td>164Dy<\/td><\/tr>
Electronic shell<\/td>[Xe] 4f106s2<\/td><\/tr>
The energy of the first ionization<\/td>571.2 kJ.mol-1<\/td><\/tr>
The energy of the second ionization<\/td>1124 kJ.mol-1<\/td><\/tr>
Discovery date<\/td>In 1886 by Paul-\u00c9mile Lecoq de Boisbaudran<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Dysprosium is the chemical element of the periodic table with the symbol Dy, atomic number 66, atomic mass of 162.50 g.mol<\/span>-1<\/span>, and electron configuration [Xe] 4f<\/span>10<\/span>6s<\/span>2<\/span>. This soft metal classified in the lanthanides family of elements has an electronegativity of 1.2 according to Pauling and an atomic radius of 175 pm. <\/span><\/p>\n\n\n\n

Highly reactive with both water and oxygen<\/a>, dysprosium reaches its boiling point at 2567\u00b0C (4653\u00b0F, 2840K), while the melting point is achieved at 1412\u00b0C (2574\u00b0F, 1685K). At temperatures of 85K (\u2212188.2\u00b0C), dysprosium displays ferromagnetic properties that adopt a helical antiferromagnetic state when the temperature reaches above 85 K (\u2212188.2 \u00b0C), i.e. it resists demagnetization. Dysprosium tarnishes lightly in moist air, while its luster remains when this soft metal is exposed to dry air.<\/span><\/p>\n\n\n\n

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How Was Dysprosium Discovered?<\/span><\/h2>\n\n\n\n

In 1794, yttrium<\/a> oxide was the chemical substance that had sparked great interest among the scientists working in the field of chemistry. The extensive experiments that were conducted on this chemical lead to not one, but several great discoveries in chemistry. Namely, in 1843 the scientists succeeded to discover erbium<\/a> (Er), while the consecutive researches opened the way to the discovery of holmium<\/a> (Ho) in 1878.\u00a0<\/span><\/p>\n\n\n\n

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Johan Gadolin\u2019s Contribution to the Discovery of Dysprosium<\/span><\/h3>\n\n\n\n

But, let\u2019s get back to 1794. That year, the Finnish chemist Johan Gadolin (1760 – 1852) attempted to analyze a mineral sample obtained from the small Swedish town of Ytterby. His analysis showed the presence of a new mineral that he referred to as <\/span>yttrium<\/span><\/i>. <\/span><\/p>\n\n\n\n

In the following experiments conducted on this mineral, Gadolin noticed some impurities. In 1843, two of those trace impurities found in erbia (the oxide of erbium) were recognized by Carl Gustav Mosander (1797 – 1858) as the new elements erbium and terbium<\/a>, while in 1878, holmium and thulium<\/a> were discovered in the same manner.<\/span><\/p>\n\n\n\n

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The Successful Research of Paul-\u00c9mile Lecoq de Boisbaudran <\/span><\/h3>\n\n\n\n

In 1886, the French chemist Paul-\u00c9mile Lecoq de Boisbaudran (1838 – 1912) followed Gadolin’s findings. De Boisbaudran was intrigued by a piece of mineral containing holmium. He assumed that a new chemical element is \u2018hiding\u2019 in this mineral sample. <\/span><\/p>\n\n\n\n

Thus, he embarked on a rather lengthy scientifical journey by attempting to isolate the new element by conducting precipitations with ammonia and oxalate more than 32 times. After this procedure, he would control the fractions spectroscopically. His persistence led him to the highly desired result and the discovery of the chemical element dysprosium (Dy).\u00a0<\/span><\/p>\n\n\n\n

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The Innovative Work of Frank Spedding<\/span><\/h3>\n\n\n\n

Until the 1950s, the researchers that tried to isolate this element after de Boisbaudran also didn\u2019t manage to easily isolate the element. It was Frank Spedding (1902 – 1984) who finally succeeded in discovering the ideal technique for the isolation of dysprosium from minerals. <\/span><\/p>\n\n\n\n

By using ion-exchange chromatography, this Canadian-American chemist managed to separate the dysprosium from the other elements of the analyzed chemical compound.\u00a0<\/span><\/p>\n\n\n\n

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How Did Dysprosium Get Its Name?<\/span><\/h2>\n\n\n\n

Since dysprosium is not only never found in its pure elemental form in nature, but it\u2019s also hard to be obtained by any other means, the Greek word \u201c<\/span>dysprositos<\/span><\/i>\u201d (meaning: <\/span>hard to get<\/span><\/i>) seemed to be the ultimate choice for the name of the new element that required numerous fractional crystallisations in order to be isolated in its pure form.\u00a0<\/span><\/p>\n\n\n\n

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Where Can You Find Dysprosium?<\/span><\/h2>\n\n\n\n

This rare-earth element can be obtained from the minerals monazite, samarium<\/a>, bastn\u00e4site, polycrase, blomstrandine, euxenite, xenotime, gadolinite, and fergusonite by reduction of dysprosium trifluoride with calcium<\/a> metal, or ion exchange and the solvent extraction process. It also occurs in uranium<\/a> ores and weathered clay deposits (ion-adsorption ore).<\/span><\/p>\n\n\n\n

Nowadays, the dysprosium metal is primarily obtained via an ion exchange process from monazite sand (Ce, La, Th, Nd, Y)PO4). China, Russia, and Malaysia are the three largest producers of dysprosium in the world, while China, the CIS Countries (including Russia), and the United States count as the countries that hold the largest reserves of dysprosium.<\/span><\/p>\n\n\n\n

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Dysprosium in Everyday Life<\/span><\/h2>\n\n\n\n

The strong electronic and magnetic properties open wide areas of everyday application for dysprosium. Since it displays a thermal-neutron absorption cross-section, dysprosium is used as one of the main substances in control rods of nuclear reactors. Also, dysprosium iodide is used in the manufacture of halide discharge lamps, where dysprosium gives out a highly intense white light. <\/span><\/p>\n\n\n\n

The high magnetic susceptibility of this member of the lanthanide family of elements is also applied for:<\/span><\/p>\n\n\n\n