Praseodymium Elemental Symbol
Praseodymium



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Praséodyme Praseodym Praseodymium Praseodym Praseodym Praseodym

Praseodymium(Pr) atomic and molecular weight, atomic number and elemental symbol Praseodymium is a Block F, Group 3, Period 6 element. The number of electrons in each of praseodymium's shells is 2, 8, 18, 21, 8, 2 and its electronic configuration is [Xe]4f3 6s2. Praseodymium Bohr ModelThe praseodymium atom has a radius of 182.pm and its Van der Waals radius is 239.pm. In its elemental form, CAS 7440-10-0, praseodymium has a grayish white appearance. Elemental PraseodymiumIt resembles the typical trivalent rare earths, however, it will exhibit a +4 state when stabilized in a zirconia host. Unlike other rare-earth metals, which show antiferromagnetic and / or ferromagnetic ordering at low temperatures, praseodymium is paramagnetic at any temperature above 1 K. Praseodymium is found in the minerals monazite and bastnasite. Praseodymium was discovered by Carl Auer von Welsbach in 1885. The origin of the element name comes from the Greek words 'prasios didymos' meaning green twin.


Praseodymium is highly valued in glass and ceramic production as a bright yellow pigment because of its optimum reflectance at 560 nm. Much research is being done on its optical properties for use in amplification of telecommunication systems, including as a doping agent in fluoride fibers. High Purity (99.999%) Praseodymium (Pr) Sputtering TargetPraseodymium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity). High Purity (99.999%) Praseodymium Oxide (Pr2O3) PowderElemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. Praseodymium 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 powder and dense pellet form for such uses as optical coating and thin film applications. Oxides tend to 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. Praseodymium is also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.


Praseodymium is somewhat toxic. Safety data for Praseodymium 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 Products tab below.


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Praseodymium Properties


GENERAL PROPERTIES   PHYSICAL PROPERTIES  
Symbol: Pr Melting Point: 931 oC, 1707.8 oF, 1204.15 K
Atomic Number: 59 Boiling Point: 3520 oC, 6368 oF, 3793.15 K
Atomic Weight: 140.90765 Density: 6779  kg m-3
Element Category: lanthanide Liquid Density @ Melting Point: 6.50 g·cm−3
Group, Period, Block: n/a, 6, f Specific Heat: 0.046 Cal/g/K @ 25°C
    Heat of Vaporization 79 K-Cal/gm atom at 3512°C
CHEMICAL STRUCTURE Heat of Fusion 2.70 Cal/gm mole
Electrons: 59 Thermal Conductivity: 0.125 W/cm/K @ 298.2 K
Protons: 59 Thermal Expansion: (r.t.) (α, poly) 6.7 µm/(m·K)
Neutrons: 82 Electrical Resistivity: 68 microhm-cm @ 25°C
Electron Configuration: [Xe] 4f36s2 Electronegativity: 1.1 Paulings
Atomic Radius: 182 pm Tensile Strength: N/A
Covalent Radius: 203±7 pm Molar Heat Capacity: 27.20 J·mol−1·K−1
Van der Waals radius: 239 pm Young's Modulus: (α form) 37.3 GPa
Oxidation States: 4, 3, 2 (mildly basic oxide) Shear Modulus: (α form) 14.8 GPa
Phase: Solid Bulk Modulus: (α form) 28.8 GPa
Crystal Structure: Hexagonal Poisson Ratio: (α form) 0.281
Magnetic Ordering: paramagnetic Mohs Hardness: N/A
1st Ionization Energy: 527 kJ·mol−1 Vickers Hardness: 400 MPa
2nd Ionization Energy: 1020 kJ·mol−1 Brinell Hardness: 481 MPa
3rd Ionization Energy: 2086 kJ·mol−1 Speed of Sound: (20 °C) 2280 m·s−1
       
IDENTIFIERS   MISCELLANEOUS  
CAS Number: 7440-10-0 Abundance in typical human body, by weight: N/A
ChemSpider ID: 22384 Abundance in typical human body, by atom: N/A
PubChem CID: 23942 Abundance in universe, by weight: 2 ppb
MDL Number: MFCD00011174 Abundance in universe, by atom: 0.02 ppb
EC Number: 231-120-3 Discovered By: Carl Auer von Welsbach
Beilstein Number: N/A Discovery Date: 1885
SMILES Identifier: [Pr]  
InChI Identifier: InChI=1S/Pr Other Names: Praseodym, Praséodyme
InChI Key: PUDIUYLPXJFUGB-UHFFFAOYSA-N  
       
       
       
       
       

Praseodymium Products

Metal Forms  •  Compounds  •  Alloys  •  Oxide Forms  •  Organometallic Compounds
Sputtering Targets  •  Nanomaterials  •  Semiconductor Materials

Organometallic Compounds

Praseodymium 2-Ethylhexanoate
Praseodymium Acetylacetonate
Praseodymium(III) Hexafluoro-2,4-pentanedionate
Praseodymium(III) Hexafluoroacetylacetonate Hydrate
Praseodymium(III) Isopropoxide
Praseodymium Oxalate
Praseodymium Oxalate Decahydrate
Praseodymium Trifluoromethanesulfonate
Praseodymium(III) Tris[3-(heptafluoropropylhdroxymethylene)-d-camphorate]
Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)praseodymium(III)
Tris(6,6,7,7,8,8,8-heptafluoro-2,2-di(methyl-d3)-3,5-octanedion-1,1,1-d3-ato)praseodymium(III)
Tris(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionato)praseodymium(III)
Tris(isopropylcyclopentadienyl)praseodymium(III)
Tris[N,N-bis(trimethylsilyl)amide]praseodymium(III)
Tris[N-(diphenylphosphiny)-P,P-diphenylphosphinicamidato-O,O']praseodymium


Sputtering Targets

Praseodymium Barium Copper Oxide Sputtering Target
Praseodymium Calcium Manganate Sputtering Target
Praseodymium Cerium Manganate Sputtering Target
Praseodymium Fluoride Sputtering Target
Praseodymium Oxide Rotatable Sputtering Target
Praseodymium Oxide Sputtering Target
Praseodymium Phosphide Sputtering Target
Praseodymium Rotatable Sputtering Target
Praseodymium Selenide Sputtering Target
Praseodymium Sputtering Target
Praseodymium Telluride Sputtering Target


Crystal/ Semiconductor Materials

Praseodymium Arsenide
Praseodymium Phosphide
Praseodymium Selenide
Praseodymium Sulfide
Praseodymium Telluride


Alloys

Mischmetal Nickel Alloy


Nanomaterials

Praseodymium Nanoparticles
Praseodymium Oxide Nanopowder


Recent Research & Development for Praseodymium

  • G.V. Jagadeesha Gowda, B. Eraiah, R.V. Anavekar, Ionic conductivity of praseodymium doped silver-borate glasses, Journal of Alloys and Compounds, Volume 620, 25 January 2015
  • Jun-Gill Kang, Bong-Ki Min, Youngku Sohn, Physicochemical properties of praseodymium hydroxide and oxide nanorods, Journal of Alloys and Compounds, Volume 619, 15 January 2015
  • Yahong Jin, Yihua Hu, Li Chen, Yinrong Fu, Zhongfei Mu, Tao Wang, Jun Lin, Photoluminescence, reddish orange long persistent luminescence and photostimulated luminescence properties of praseodymium doped CdGeO3 phosphor, Journal of Alloys and Compounds, Volume 616, 15 December 2014
  • Xiao-Yu Ding, Lai-Ma Luo, Ze-Long Lu, Guang-Nan Luo, Xiao-Yong Zhu, Ji-Gui Cheng, Yu-Cheng Wu, Chemically produced tungsten–praseodymium oxide composite sintered by spark plasma sintering, Journal of Nuclear Materials, Volume 454, Issues 1–3, November 2014
  • Sahar Zinatloo-Ajabshir, Masoud Salavati-Niasari, Novel poly(ethyleneglycol)-assisted synthesis of praseodymium oxide nanostructures via a facile precipitation route, Ceramics International, Available online 2 September 2014
  • Lingxia Li, Junxiao Chen, Dong Guo, Ning Zhang, Mingjing Wang, Yaran Liu, An ultra-broad working temperature dielectric material obtained with Praseodymium doped BaTiO3–(Bi0.5Na0.5)TiO3–Nb2O5 based ceramics, Ceramics International, Volume 40, Issue 8, Part A, September 2014
  • Osamah Alduhaish, Bin Li, Vladimir Nesterov, Hadi D. Arman, Khalid Alfooty, Abdullah M. Asiri, Hailong Wang, Banglin Chen, Two structurally different praseodymium-organic frameworks with permanent porosity, Inorganic Chemistry Communications, Volume 45, July 2014
  • R.V. Vovk, N.R. Vovk, G.Ya. Khadzhai, I.L. Goulatis, A. Chroneos, Effect of praseodymium on the electrical resistance of YВа2Сu3О7−δ single crystals, Solid State Communications, Volume 190, July 2014
  • Chuan-Hua Li, Xiang-Zhi Song, Jian-Hong Jiang, Hui-Wen Gu, Li-Ming Tao, Ping Yang, Xu Li, Sheng-Xiong Xiao, Fei-Hong Yao, Wen-Qi Liu, Jin-Qi Xie, Meng-Na Peng, Lan Pan, Xi-Bin Wu, Chao Jiang, Song Wang, Man-Fen Xu, Qiang-Guo Li, Synthesis, crystal structure and thermodynamic properties of a new praseodymium Schiff-base complex, Thermochimica Acta, Volume 581, 10 April 2014
  • A.C. Cabral, L.S. Cavalcante, R.C. Deus, E. Longo, A.Z. Simões, F. Moura, Photoluminescence properties of praseodymium doped cerium oxide nanocrystals, Ceramics International, Volume 40, Issue 3, April 2014

Praseodymium Isotopes


Naturally occurring praseodymium (Pr) has one stable isotope: 141Pr.

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
141Pr 140.9076528 Stable 5/2+