Praseodymium (Pr)
MATERIAL
OVERVIEW
(Gr. prasios, green, and didymos, twin) In 1841 Mosander extracted the rare earth didymia from lanthana; in 1879, Lecoq de Boisbaudran isolated a new earth, samaria, from didymia obtained from the mineral samarskite. Six years later, in 1885, von Welsbach separated didymia into two others, praseodymia and neodymia, which gave salts of different colors. As with other rare earths, compounds of these elements in solution have distinctive sharp spectral absorption bands or lines, some of which are only a few Angstroms wide.
The element occurs along with other rare-earth elements in a variety of minerals. Monazite and bastnasite are the two principal commercial sources of the rare-earth metals. It was prepared in relatively pure form in 1931.
Ion-exchange and solvent extraction techniques have led to much easier isolation of the rare earths and the cost has dropped greatly in the past few years. Praseodymium can be prepared by several methods, such as by calcium reduction of the anhydrous chloride of fluoride.
Misch metal, used in making cigarette lighters, contains about 5% praseodymium metal. The rare-earth oxides, including Pr2O3 are among the most refractory substances known. Along with other rare earths, it is widely used as a core material for carbon arcs used by the motion picture industry for studio lighting and projection. Salts of praseodymium are used to color glasses and enamels; when mixed with certain other materials, praseodymium produces an intense and unusually clean yellow color in glass. Didymium glass, of which praseodymium is a component, is a colorant for welders goggles.
Praseodymium is soft, silvery, malleable, and ductile. It is somewhat more resistant to corrosion in air than europium, lanthanum, cerium, or neodymium but it does develop a green oxide coating that falls off when exposed to air. As with other rare-earth metals, it should be kept under a light mineral oil or sealed in plastic.
Reference: Los Alamos National Laboratory, <http://periodic.lanl.gov/elements/59.html>
ESPI Metals produces numerous fabricated forms of praseodymium including
sheet and foil, rod, powder, pellets, pieces and sputtering targets.
All of the fabricated products are produced at the company’s
GENERAL
PROPERTIES
|
Symbol: |
Pr |
|
Atomic
Number: |
59 |
|
Atomic
Weight: |
140.9077 |
|
Density: |
6.773
gm/cc |
|
Melting
Point: |
931
oC |
|
Boiling
Point: |
3512
oC |
|
Thermal
Conductivity: |
0.125
W/cm/oK
@ 298.2 oK |
|
Electrical
Resistivity: |
68
microhm-cm @ 25 oC |
|
Electronegativity: |
1.1
Paulings |
|
Specific
Heat: |
0.046
Cal/g/oK
@ 25 oC |
|
Heat
of Vaporization: |
79
K-Cal/gm atom at 3512 oC |
|
Heat
of Fusion: |
2.70
Cal/gm mole |
|
Thermal
Neutron Cross Section: |
11
Barns per Atom |
|
Magnetic
Susceptibility: |
5470x10-6
Emu
@ Room Temp |
|
Magnetic
Moment: |
3.6
Bohr Magnetons |
|
Temperature
Coefficient of Resistance: |
0.00171
@ 0 oC
to Room Temp
|
TYPICAL ANALYSES
Impurities in ppm
|
Material
/ Purity: |
3N
|
|
Mg |
100 |
|
Fe |
100 |
|
Si |
100 |
|
Nd |
<500 |
|
La |
<500 |
|
Al |
200 |
|
Ca |
<100 |
|
Y |
<100 |
|
Ni |
<100 |
PRASEODYMIUM ROD
|
Material |
Purity |
|
Praseodymium
Rod .250” |
3N |
|
Praseodymium
Rod .500” |
3N |
Rod is
cut to order and sold by the inch or foot.
PRASEODYMIUM
FOIL
|
Material
|
Purity |
|
Praseodymium
Foil .001” |
3N |
|
Praseodymium
Foil .002” |
3N |
|
Praseodymium
Foil .003” |
3N |
|
Praseodymium
Foil .004” |
3N |
|
Praseodymium
Foil .005” |
3N |
|
Praseodymium
Foil .006” |
3N |
|
Praseodymium
Foil .007” |
3N |
|
Praseodymium
Foil .008” |
3N |
|
Praseodymium
Foil .009” |
3N |
Foil is cut to order and sold by the square inch or square foot.
PRASEODYMIUM SHEET
|
Material |
Purity |
|
Praseodymium
Sheet .010” to 0.04” |
3N |
Sheet is
cut to order and sold by the square inch or square foot.
PRASEODYMIUM
SPUTTERING TARGETS
|
Material |
Purity |
|
Praseodymium
Sputtering Target 2"D X .125"T |
3N |
|
Praseodymium
Sputtering Target 2"D X .250"T |
3N |
|
Praseodymium
Sputtering Target 3"D X .125"T |
3N |
|
Praseodymium
Sputtering Target 3"D X .250"T |
3N |
|
Praseodymium
Sputtering Target 4"D X .125"T |
3N |
|
Praseodymium
Sputtering Target 4"D X .250"T |
3N |
Additional
sizes available upon request. For Sputtering Targets produced
from Praseodymium compounds see catalog section ‘Sputtering Targets.’
PRASEODYMIUM
POWDER, SHOT, PELLETS, & INGOT
|
Material |
Purity |
|
|
Praseodymium
Chips |
3N |
|
| Praseodymium Ingot | 3N | |
| Praseodymium Powder -40 Mesh, Under Oil | 3N | |
|
Praseodymium
Powder -40 Mesh, Ampoules Under Dry Argon |
3N |
|
| Praseodymium
Powder -40 Mesh, Cans Under Dry Argon |
3N | |
Powder,
shot, pellets, and ingots are packaged to order and sold by the gram or
kilogram.
PRASEODYMIUM COMPOUNDS
|
Material |
Purity |
|
Praseodymium
Aluminide PrAl2
1/4" Pieces by Down |
2N5 |
|
Praseodymium
Antimonide PrSb 1/4" Pieces by Down |
2N5 |
|
Praseodymium
Bismuthide PrBi 1/4" Pieces by Down |
2N5 |
|
Praseodymium
Boride PrB6
-325 Mesh |
3N |
|
Praseodymium
Bromide PrBr3-xH2O
-60 Mesh |
3N |
|
Praseodymium
Bromide PrBr3
-60 Mesh |
3N |
|
Praseodymium
Chloride PrCl3-xH2O
-60 Mesh |
3N |
|
Praseodymium
Chloride PrCl3
-60 Mesh |
3N |
|
Praseodymium
Fluoride PrF3
1/4"-1/8" Pieces |
3N |
|
Praseodymium
Fluoride PrF3
-60 Mesh |
3N |
|
Praseodymium
Fluoride PrF3
-325 Mesh |
3N |
|
Praseodymium
Hydride PrH2-3
-60 Mesh |
3N |
|
Praseodymium
Iodide PrI3-xH2O
-60 Mesh |
3N |
|
Praseodymium
Iodide PrI3
-60 Mesh |
3N |
|
Praseodymium
Nitride PrN -60 Mesh |
3N |
|
Praseodymium
Oxide Pr6O11
-325 Mesh |
3N, 5N |
|
Praseodymium
Oxide Pr2O3
1/2"-1/8" Pieces |
3N |
|
Praseodymium
Oxide Pr6O11
1/2"-1/8" Pieces |
3N |
|
Praseodymium
Oxide Pr2O3
-325 Mesh |
3N |
|
Praseodymium
Phosphide PrP -60 Mesh |
2N5 |
|
Praseodymium
Silicide PrSi2
1/4" Pieces by Down |
3N |
Compounds are packaged to order and sold by the gram or kilogram.
|
Material
Safety Data Sheet - MSDS |