Holmium (Ho)
MATERIAL
OVERVIEW
(L. Holmia: Stockholm). The special absorption bands of holmium were noticed in 1878 by the Swiss chemists Delafontaine and Soret, who announced the existence of an "Element X." Cleve, of Sweden, later independently discovered the element while working on erbia earth. The element is named after Cleve's native city. Holmia, the yellow oxide, was prepared by Homberg in 1911. Holmium occurs in gadolinite, monazite, and in other rare-earth minerals. It is commercially obtained from monazite, occurring in that mineral to the extent of about 0.05%. It has been isolated by the reduction of its anhydrous chloride or fluoride with calcium metal.
Pure holmium has a metallic to bright silver luster. It is relatively soft and malleable, and is stable in dry air at room temperature, but rapidly oxidizes in moist air and at elevated temperatures. The metal has unusual magnetic properties. Few uses have yet been found for the element. The element, as with other rare earths, seems to have a low acute toxic rating.
Reference: Los Alamos National Laboratory, <http://periodic.lanl.gov/elements/67.html>
GENERAL
PROPERTIES
|
Symbol: |
Ho |
|
Atomic
Number: |
67 |
|
Atomic
Weight: |
164.9304 |
|
Density: |
8.795
gm/cc |
| Estimated Crustal Abundance: | 1.3 miligrams per Kg |
| Estimated Oceanic Abundance: | 2.2x10-7 miligrams per liter |
|
Melting
Point: |
1474
oC |
|
Boiling
Point: |
2695
oC |
|
Thermal
Conductivity: |
0.162
W/cm/oK
@ 298.2 oK |
|
Electrical
Resistivity: |
87.0
microhm-cm @ 25 oC |
|
Electronegativity: |
1.2
Paulings |
|
Specific
Heat: |
0.0393
Cal/g/oK
@ 25 oC |
|
Heat
of Vaporization: |
67
K-Cal/gm atom at 2695 oC |
|
Heat
of Fusion: |
4.10
Cal/gm mole |
|
Thermal
Neutron Cross Section: |
64
Barns per Atom |
TYPICAL ANALYSES
Impurities in ppm
|
Material
/ Purity: |
3N
|
|
Er |
60 |
|
Ca
|
10 |
|
Y |
10 |
|
Mg |
10 |
|
Fe |
10 |
|
Yb |
10 |
|
Ta |
300 |
|
Tm |
10 |
|
Dy |
10 |
|
Si |
10 |
|
Al |
10 |
|
Ni |
10 |
HOLMIUM ROD
|
Material |
Purity |
|
Holmium
Rod .125 |
3N |
|
Holmium
Rod .250 |
3N |
|
Holmium
Rod .500 |
3N |
|
Holmium
Rod .750 |
3N |
|
Holmium
Rod 1 |
3N |
Additional
diameters can be drawn in 2-3 days.
Rod is cut to order and sold by the inch or foot.
HOLMIUM FOIL
|
Material
|
Purity |
|
Holmium
Foil .001 |
3N |
|
Holmium
Foil .002 |
3N |
|
Holmium
Foil .003 |
3N |
|
Holmium
Foil .004 |
3N |
|
Holmium
Foil .005 |
3N |
|
Holmium
Foil .006 |
3N |
|
Holmium
Foil .007 |
3N |
|
Holmium
Foil .008 |
3N |
|
Holmium
Foil .009 |
3N |
Foil is
cut to order and sold by the square inch or square foot.
HOLMIUM SHEET
|
Material |
Purity |
|
Holmium
Sheet .010 to 0.5 |
3N |
Sheet
thicknesses are available in increments of .001.
Sheet is cut to order and sold by the square inch or square foot.
HOLMIUM SPUTTERING
TARGETS
|
Material |
Purity |
|
Holmium
Sputtering Target 2"D X .125"T |
3N |
|
Holmium
Sputtering Target 2"D X .250"T |
3N |
|
Holmium
Sputtering Target 3"D X .125"T |
3N |
|
Holmium
Sputtering Target 3"D X .250"T |
3N |
|
Holmium
Sputtering Target 4"D X .125"T |
3N |
|
Holmium
Sputtering Target 4"D X .250"T |
3N |
Additional
sizes and sputtering targets produced from compounds are available
upon request.
HOLMIUM POWDER, SHOT,
PELLETS, & INGOT
|
Material |
Purity |
|
Holmium
Chips |
3N |
|
Holmium
Ingot |
3N |
|
Holmium
Powder -40 Mesh, Under Oil |
3N |
|
Holmium
Powder -40 Mesh, Ampoules Under Dry Argon |
3N |
| Holmium
Powder -40 Mesh, Cans Under Dry Argon |
3N |
Powder,
chip, and ingots are packaged to order and sold by the gram or kilogram.
HOLMIUM COMPOUNDS
|
Material |
Purity |
|
Holmium
Aluminide HoAl2
1/4" Pieces by Down |
2N5 |
|
Holmium
Antimonide HoSb 1/4" Pieces by Down |
2N5 |
|
Holmium
Arsenide HoAs 1/4" Pieces by Down |
2N5 |
|
Holmium
Bismuthide HoBi 1/4" Pieces by Down |
2N5 |
|
Holmium
Boride HoB4
-100 Mesh |
3N |
|
Holmium
Bromide HoBr3-xH2O
-60 Mesh |
3N |
|
Holmium
Bromide HoBr3
-60 Mesh |
3N |
|
Holmium
Chloride HoCl3-xH2O
-60 Mesh |
3N |
|
Holmium
Chloride HoCl3
-60 Mesh |
3N |
|
Holmium
Fluoride HoF3
1/4"-1/8" Pieces |
3N |
|
Holmium
Fluoride HoF3
-60 Mesh |
3N |
|
Holmium
Fluoride HoF3
-325 Mesh |
3N |
|
Holmium
Hydride HoH2-3
-60 Mesh |
3N |
|
Holmium
Iodide HoI3-xH2O
-60 Mesh |
3N |
|
Holmium
Iodide HoI3
-60 Mesh |
3N |
|
Holmium
Nitride HoN -60 Mesh |
3N |
|
Holmium
Oxide Ho2O3
-325 Mesh |
3N,
5N |
|
Holmium
Oxide Ho2O3
1/2"-1/8" Pieces |
3N |
|
Holmium
Phosphide HoP -60 Mesh |
3N |
|
Holmium
Selenide Ho-Se -100 Mesh |
3N |
|
Holmium
Silicide HoSi2
1/4" Pieces by Down |
3N |
|
Holmium
Sulfide Ho2S3
-200 Mesh |
3N |
|
Holmium
Telluride Ho2Te3
-20 Mesh |
3N |
Compounds
are packaged to order and sold by the gram or kilogram.
For Holmium single crystals see Single Crystals.
|
Material
Safety Data Sheet - MSDS |