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Dysprosium information, including Technical Data, Safety Data and its High Purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.

Dysprosium Bohr ModelDysprosium is most commonly used in neodymium-iron-boron high strength permanent magnets. Dysprosium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. While it has one of the highest magnetic moments of any of the rare earths (10.6µB), this has not resulted in an ability to perform on its own as a practical alternative to neodymium compositions. It is however now an essential additive in NdFeB production. It is also used in special ceramic compositions based on BaTiO formulations. Recent research has examined the use of dysprosium in dysprosium-iron-garnet (DyIG) and silicon implanted with dysprosium and holmium to form donor centers. Dysprosium is added to various advanced optical formulations due to the fact that it emits in the 470-500 and 570-600 nm wavelengths. Dysprosium metal is used in rare earth magnet alloys and magnesium alloys. Due to dysprosium and its compounds high susceptibility to magnetization, they are used in a variety of data storage applications, such as in compact discs.

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Dysprosium facts, including appearance, CAS #, and molecular formula and safety data, research and properties are available for many specific states, forms and shapes on the product pages listed to the left. Elemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. Nanoparticles and nanopowders provide ultra high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits.

Oxides are available in forms including powders and dense pellets for such uses as optical coating and thin film applications. Oxides tend High Purity (99.999%) Dysprosium Oxide (Dy2O3) Powderto be insoluble. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Dysprosium is available in soluble forms including chlorides, nitrates and acetates. These compounds are also manufactured as solutions at specified stoichiometries.

Dysprosium is a Block F, Group 3, Period 6 element. The number of electrons in each of Dysprosium's shells is 2, 8, 18, 28, 8, 2 and its electronic configuration is [Xe] 4f10 6s2. In its elemental form dysprosium's CAS number is 7429-91-6. The dysprosium atom has a radius of 175.2.pm and it's Van der Waals radius is unknown. Dysprosium is moderately toxic.

High Purity (99.995%) Dysprosium (Dy) Sputtering TargetAll elemental metals, compounds and solutions may be synthesized in ultra high purity (e.g. 99.999%) for laboratory standards, advanced electronic, thin fillm deposition using sputtering targets and evaporation materials, metallurgy and optical materials and other high technology applications. Information is provided for stable (non-radioactive) isotopes. Organo-Metallic Dysprosium compounds are soluble in organic or non-aqueous solvents. See Analytical Services for information on available certified chemical and physical analysis techniques including MS-ICP, X-Ray Diffraction, PSD and Surface Area (BET) analysis.

Dysprosium is found in various minerals including bastnäsite, blomstrandine, euxenite, fergusonite, gadolinite, monazite, polycrase and xenotime. It is not found in nature as a free element. Monazite sand is the primary commercial source of Dysprosium. Dysprosium was first discovered by Paul Emile Lecoq de Boisbaudran in 1886. The element name originates from the Greek word 'dysprositos' meaning hard to get at.
French dysprosium German Dysprosium Italian disprosio Portuguese Disprósio Spanish disprosio Swedish Dysprosium


Dysprosium Abundance. The following table shows the abundance of Dysprosium and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope.
Isotope Atomic Mass % Abundance on Earth
Dy-156 155.924 0.06
Dy-158 157.924 0.10
Dy-160 159.925 2.34
Dy-161 160.927 18.9
Dy-162 161.927 25.5
Dy-163 162.929 24.9
Dy-164 163.929 28.2


The following table shows the abundance of Dysprosium present in the human body and in the universe scaled to parts per billion (ppb) by weight and by atom:
  Typical Human Body Universe
by Weight no data 2 ppb
by Atom no data 0.02 ppb


Dysprosium Safety Data and Biological Role. The safety data for Dysprosium metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin. Dysprosium compounds have no biological role.

Ionization Energy. The ionization energy for Dysprosium (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table:
1st Ionization Energy 573.02 kJ mol-1
2nd Ionization Energy 1125.99 kJ mol-1
3rd Ionization Energy 2199.88 kJ mol-1


Conductivity. As to Dysprosium's electrical and thermal conductivity, the electrical conductivity measured in terms of electrical resistivity @ 20 ºC is 57 µOcm and its electronegativities (or its ability to draw electrons relative to other elements) is 1.22. The thermal conductivity of Dysprosium is 10.7 W m-1 K-1.

Thermal Properties of Dysprosium. The melting point and boiling point for Dysprosium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.
Heat of Fusion 17.2 kJ mol-1
Heat of Vaporization 293 kJ mol-1
Heat of Atomization 293.05 kJ mol-1


Recent Research & Development for Dysprosium
  • Selected Trace Elements in the Sacramento River, California: Occurrence and Distribution. Taylor HE, Antweiler RC, Roth DA, Alpers CN, Dileanis P. Arch Environ Contam Toxicol. 2011 Dec 23. [Epub ahead of print] PMID: 22193863 [PubMed - as supplied by publisher]

  • High energy electron beams characterization using CaSO(4):Dy+PTFE Phosphors for clinical therapy applications. Rivera T, Espinoza A, Von SM, Alvarez R, Jiménez Y. Appl Radiat Isot. 2011 Dec 13. [Epub ahead of print] PMID: 22182630 [PubMed - as supplied by publisher]

  • Strongly dipolar bose-einstein condensate of dysprosium. Lu M, Burdick NQ, Youn SH, Lev BL. Phys Rev Lett. 2011 Nov 4;107(19):190401. Epub 2011 Oct 31. PMID: 22181585 [PubMed - in process]

  • Lipophilic phosphonium-lanthanide compounds with magnetic, luminescent, and tumor targeting properties. Li M, Ganea GM, Lu C, De Rooy SL, El-Zahab B, Fernand VE, Jin R, Aggarwal S, Warner IM. J Inorg Biochem. 2011 Nov 3;107(1):40-46. [Epub ahead of print] PMID: 22172501 [PubMed - as supplied by publisher]

  • Differential genotoxicity of chemical properties and particle size of rare metal and metal oxide nanoparticles. Hasegawa G, Shimonaka M, Ishihara Y. J Appl Toxicol. 2012 Jan;32(1):72-80. doi: 10.1002/jat.1719. Epub 2011 Aug 23. PMID: 22162085 [PubMed - in process]

  • A Discrete Dysprosium Trigonal Prism Showing Single-Molecule Magnet Behaviour. Tian H, Wang M, Zhao L, Guo YN, Guo Y, Tang J, Liu Z. Chemistry. 2011 Dec 12. doi: 10.1002/chem.201102547. [Epub ahead of print] PMID: 22161973 [PubMed - as supplied by publisher]

  • Synthesis, characterisation and magnetic study of a cyano-substituted dysprosium double decker single-molecule magnet. Waters M, Moro F, Krivokapic I, McMaster J, Slageren JV. Dalton Trans. 2011 Dec 6. [Epub ahead of print] PMID: 22146842 [PubMed - as supplied by publisher]

  • Molecular Structure and Vibrational Spectra of Mixed MDyX(4) (M = Li, Na, K, Rb, Cs; X = F, Cl, Br, I) Vapor Complexes: A Computational and Matrix-Isolation Infrared Spectroscopic Study. Groen CP, Kovács A, Varga Z, Hargittai M. Inorg Chem. 2011 Dec 2. [Epub ahead of print] PMID: 22136352 [PubMed - as supplied by publisher]

  • Quadruple-CO(3)(2-) bridged octanuclear dysprosium(iii) compound showing single-molecule magnet behaviour. Tian H, Zhao L, Guo YN, Guo Y, Tang J, Liu Z. Chem Commun (Camb). 2012 Jan 18;48(5):708-10. Epub 2011 Dec 1. PMID: 22129652 [PubMed - in process]

  • Salen-based coordination polymers of iron and the rare Earth elements. Bhunia A, Lan Y, Mereacre V, Gamer MT, Powell AK, Roesky PW. Inorg Chem. 2011 Dec 19;50(24):12697-704. Epub 2011 Nov 14. PMID: 22082051 [PubMed - in process]

  • Novel lanthanide-based polymeric chains and corresponding ultrafast dynamics in solution. Thielemann DT, Klinger M, Wolf TJ, Lan Y, Wernsdorfer W, Busse M, Roesky PW, Unterreiner AN, Powell AK, Junk PC, Deacon GB. Inorg Chem. 2011 Dec 5;50(23):11990-2000. Epub 2011 Nov 8. PMID: 22066577 [PubMed - in process]

  • Tetra-kis(µ-2-phen-oxy-propionato)-?O,O':O';?O:O,O',?O:O'-bis-[(1,10-phenanthroline-?N,N')(2-phen-oxy-propionato-?O,O')praseodymium(III)]. Shen JB, Liu JL, Zhao GL. Acta Crystallogr Sect E Struct Rep Online. 2011 Sep 1;67(Pt 9):m1321. Epub 2011 Aug 31. PMID: 22058896 [PubMed]

  • Tetra-kis(µ-2-phen-oxy-propionato)-?O,O':O';?O:O,O',?O:O'-bis-[(1,10-phenanthroline-?N,N')(2-phen-oxy-propionato-?O,O')dysprosium(III)]. Shen JB, Liu JL, Zhao GL. Acta Crystallogr Sect E Struct Rep Online. 2011 Sep 1;67(Pt 9):m1320. Epub 2011 Aug 31. PMID: 22058895 [PubMed]

  • An organometallic sandwich lanthanide single-ion magnet with an unusual multiple relaxation mechanism. Jeletic M, Lin PH, Le Roy JJ, Korobkov I, Gorelsky SI, Murugesu M. J Am Chem Soc. 2011 Dec 7;133(48):19286-9. Epub 2011 Nov 11. PMID: 22032273 [PubMed - in process]

  • A tetragonal form of dysprosium orthomolybdate at room temperature. Dorzhieva S, Chumak I, Sarapulova A, Mikhailova D, Bazarova J, Ehrenberg H. Acta Crystallogr C. 2011 Oct;67(Pt 10):i50-2. Epub 2011 Sep 15. PMID: 21979965 [PubMed - in process]

  • Note: simple means for selective removal of the 365 nm line from the Hg spectrum using Dy. Vesborg PC, Chorkendorff I, Brock-Nannestad T, Dethlefsen JR, Bendix J. Rev Sci Instrum. 2011 Sep;82(9):096102. PMID: 21974629 [PubMed - in process]

  • Effects of chronic ?-irradiation on the aquatic microbial microcosm: equi-dosimetric comparison with effects of heavy metals. Fuma S, Kawaguchi I, Kubota Y, Yoshida S, Kawabata Z, Polikarpov GG. J Environ Radioact. 2012 Feb;103(2):81-6. Epub 2011 Sep 29. PMID: 21962482 [PubMed - in process]

  • Cool White Light Emission in Dysprosium and Salicylic Acid Doped Poly Vinyl Alcohol Film Under UV Excitation. Kaur G, Rai SB. J Fluoresc. 2011 Sep 27. [Epub ahead of print] PMID: 21947610 [PubMed - as supplied by publisher]

  • [Synthesis, crystal structure and luminescent properties of a dysprosium coordinaation polymer based on pyridine-2, 6-dicarboxylic acid]. Fan RQ, Wang P, Ren JY, Zhou GP, Yang YL. Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Jul;31(7):1734-8. Chinese. PMID: 21942013 [PubMed - in process]

  • Anisotropic dysprosium. Gatteschi D. Nat Chem. 2011 Sep 23;3(10):830. doi: 10.1038/nchem.1157. No abstract available. PMID: 21941259 [PubMed - indexed for MEDLINE]
  •  
    Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point Boiling Point Vanderwaals radius Ionic radius Energy of first ionization
    Dy 66 162.50 g.mol -1 1.2 8.6 g.cm-3 at 20 °C 1412 °C 2562 °C unknown unknown 571.2 kJ.mol-1

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