Selenium

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Selenium Shot

MATERIAL OVERVIEW

Characteristics: Amorphous red powder, becoming black on standing and crystalline on heating; vitreous and colloidal forms may be prepared. Amorphous form softens at 40 °C and melts at 217 °C. It rarely occurs in its elemental state in nature, or as pure ore compounds.

Crystalline selenium is a p-type semiconductor and electrically, it acts as a rectifier, and has marked photoconductive and photovoltaic action (converts radiant to electrical energy). The electrical conductivity increases with increasing light irradiation.

Soluble in concentrated nitric acid and in (liquid form) common alkalies. Forms binary alloys with silver, copper, zinc, lead, etc. Low toxicity. A necessary nutritional factor for animals.

Hazards: Selenium salts are toxic in large amounts, but trace amounts are necessary for cellular function.

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GENERAL PROPERTIES

Symbol:

Se

Atomic Number:

34

Atomic Weight:

78.96

Density:

4.79 gm/cc

Melting Point:

217 oC

Boiling Point:

684.9 oC

Thermal Conductivity:

0.00519 W/cm/K @ 298.2 K

Electrical Resistivity:

106 microhm-cm @ 0 oC

Electronegativity:

2.4 Paulings

Specific Heat:

0.767 Cal/g/K @ 25 oC

Heat of Vaporization:

3.34 K-cal/gm atom at 684.9 oC

Heat of Fusion:

1.22 Cal/gm mole

TYPICAL ANALYSES - Impurities in ppm

Material / Purity:

5N

As <1
Cu <1
Te <1

SELENIUM POWDER, SHOT, PELLETS, & INGOT

Material

Purity

Selenium Shot 1-3mm or 1-5mm 5N
Selenium Pieces 5mm and Down 5N
Selenium Powder-200 Mesh 2N7
Selenium Powder-325 Mesh 2N7

Powder, shot, pellets, and ingots are packaged to order and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.

SELENIUM COMPOUNDS

Material

Purity

Selenium Chloride SeCl4  8 –Mesh 2N8
Selenium Oxide SeO2  -20 Mesh 2N5, 5N

Compounds are packaged to order and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.

 

Material Safety Data Sheet - MSDS
Selenium MSDS
Technical Data Sheets
Understanding Mesh Sizes