Terbium (Tb)
MATERIAL
OVERVIEW
(Ytterby, a village in Sweden) Discovered by Mosander in 1843. Terbium is a member of the lanthanide or "rare earth" group of elements. It is found in cerite, gadolinite, and other minerals along with other rare earths. It is recovered commercially from monazite in which it is present to the extent of 0.03%, from xenotime, and from euxenite, a complex oxide containing 1% or more of terbia.
Terbium has been isolated only in recent years with the development of ion-exchange techniques for separating the rare-earth elements. As with other rare earth metals, it can be produced by reducing the anhydrous chloride or fluoride with calcium metal in a tantalum crucible. Calcium and tantalum impurities can be removed by vacuum remelting. Other methods of isolation are possible.
Terbium is reasonably stable in air. It is a silver-gray metal, and is malleable, ductile, and soft enough to be cut with a knife. Two crystal modifications exist, with a transformation temperature of 1289oC. Twenty one isotopes with atomic masses ranging from 145 to 165 are recognized. The oxide is a chocolate or dark maroon color.
Sodium terbium borate is used in solid-state devices. The oxide has potential application as an activator for green phosphors used in color TV tubes. It can be used with ZrO2 as a crystal stabilizer of fuel cells which operate at elevated temperature. Few other uses have been found.
Reference: Los Alamos National Laboratory, <http://periodic.lanl.gov/elements/65.html>
GENERAL
PROPERTIES
|
Symbol: |
Tb |
|
Atomic
Number: |
65 |
|
Atomic
Weight: |
158.9254 |
|
Density: |
8.229
gm/cc |
|
Melting
Point: |
1356
oC |
|
Boiling
Point: |
3123
oC |
|
Thermal
Conductivity: |
0.111
W/cm/oK
@ 298.2 oK |
|
Electrical
Resistivity: |
- |
|
Electronegativity: |
1.2
Paulings |
|
Specific
Heat: |
0.0437
Cal/g/oK
@ 25 oC |
|
Heat
of Vaporization: |
70
K-Cal/gm atom at 3123 oC |
|
Heat
of Fusion: |
3.90
Cal/gm mole |
|
Thermal
Neutron Cross Section: |
44
Barns per Atom |
|
Magnetic
Susceptibility: |
172,000
x 10-6
Emu
@ Room Temp |
|
Magnetic
Moment: |
9.05
Bohr Magnetons |
|
Temperature
Coefficient of Resistance: |
0
oC
to Room Temp |
TYPICAL ANALYSES
Impurities in ppm
|
Material
/ Purity: |
3N
|
|
Ca |
<100 |
|
Fe |
100 |
|
Gd |
<100 |
|
Ni |
200 |
|
Si |
<100 |
|
Y |
<100 |
|
Eu |
<100 |
|
Dy |
100 |
|
Mg |
<100 |
|
Al |
<100 |
TERBIUM ROD
|
Material |
Purity |
|
Terbium
Rod .250” |
3N |
|
Terbium
Rod .500” |
3N |
Rod is
cut to order and sold by the inch or foot.
TERBIUM FOIL
|
Material
|
Purity |
|
Terbium
Foil .001” |
3N |
|
Terbium
Foil .002” |
3N |
|
Terbium
Foil .003” |
3N |
|
Terbium
Foil .004” |
3N |
|
Terbium
Foil .005” |
3N |
|
Terbium
Foil .006” |
3N |
|
Terbium
Foil .007” |
3N |
|
Terbium
Foil .008” |
3N |
|
Terbium
Foil .009” |
3N |
Foil is
cut to order and sold by the square inch or square foot.
TERBIUM SHEET
|
Material |
Purity |
|
Terbium
Sheet .010” to .040” |
3N |
Sheet is
cut to order and sold by the square inch or square foot.
TERBIUM SPUTTERING
TARGETS
|
Material |
Purity |
|
Terbium
Sputtering Target 2"D X .125"T |
3N |
|
Terbium
Sputtering Target 2"D X .250"T |
3N |
|
Terbium
Sputtering Target 3"D X .125"T |
3N |
|
Terbium
Sputtering Target 3"D X .250"T |
3N |
|
Thulium
Sputtering Target 4"D X .125"T |
3N |
|
Thulium
Sputtering Target 4"D X .250"T |
3N |
Additional
sizes and Terbium compounds are available upon request.
TERBIUM POWDER,
SHOT, PELLETS, & INGOT
|
Material |
Purity |
|
Terbium
Chips |
3N |
|
Terbium
Ingot |
3N |
|
Terbium
Powder -40 Mesh |
3N |
|
Terbium
Powder -40 Mesh, Ampoules Under Dry Argon |
3N |
| Terbium
Powder -40 Mesh, Cans Under Dry Argon |
3N |
Powder,
shot, pellets, and ingots are packaged to order and sold by the gram or
kilogram.
TERBIUM COMPOUNDS
|
Material |
Purity |
|
Terbium
Aluminide TbAl2
1/4" Pieces by Down 2N5 |
2N5 |
|
Terbium
Arsenide TbAs 1/4" Pieces by Down 2N5 |
2N5 |
|
Terbium
Bismuthide TbBi 1/4" Pieces by Down 2N5 |
2N5 |
|
Terbium
Boride TbB6
-325 Mesh 3N |
3N |
|
Terbium
Bromide TbBr3-xH2O
-60 Mesh 3N |
3N |
|
Terbium
Bromide TbBr3
-60 Mesh 3N |
3N |
|
Terbium
Chloride TbCl3-xH2O
-60 Mesh 3N |
3N |
|
Terbium
Chloride TbCl3
-60 Mesh 3N |
3N |
|
Terbium
Fluoride TbF3
1/4" to 1/8" Pieces 3N |
3N |
|
Terbium
Fluoride TbF3
-325 Mesh 3N |
3N |
|
Terbium
Hydride TbH2-3
-60 Mesh 3N |
3N |
|
Terbium
Iodide TbI3-xH2O
-60 Mesh 3N |
3N |
|
Terbium
Iodide TbI3
-60 Mesh 3N |
3N |
|
Terbium
Nitride TbN -40 Mesh 3N |
3N |
|
Terbium
Oxide Tb4O7
-325 Mesh 3N 5N |
3N, 5N |
|
Terbium
Oxide Tb4O7
1/2" to 1/8" Pieces 3N |
3N |
|
Terbium
Phosphide TbP -40 Mesh 2N 5N |
2N, 5N |
|
Terbium
Selenide Tb-Se -100 Mesh 3N |
3N |
|
Terbium
Silicide TbSi2
1/4" Pieces by Down 3N |
3N |
|
Terbium
Sulfide Tb2S3
-200 Mesh 3N |
3N |
|
Terbium
Telluride TbTe -20 Mesh 3N |
3N |
Compounds are packaged to order and sold by the gram or kilogram.
|
Material
Safety Data Sheet - MSDS |