| Identification | More | [Name]
STRONTIUM SELENIDE | [CAS]
1315-07-7 | [Synonyms]
STRONTIUM SELENIDE
strontiumselenide(srse)
STRONTIUM SELENIDE, 99.99+%
Strontium selenide, 99.5%
Strontium selenide, 99.5% (metals basis) | [EINECS(EC#)]
215-258-1 | [Molecular Formula]
SeSr | [MDL Number]
MFCD00054059 | [Molecular Weight]
166.58 | [MOL File]
1315-07-7.mol |
| Hazard Information | Back Directory | [Chemical Properties]
white cub; -20 mesh with 99.5% purity [CER91] [CRC10] | [Description]
Strontium selenide has the molecular formula of SrSe and the molecular weight of 166.5852 g/mol. It is a white cubic crystal whose CAS number is 1315-07-7. Its melting point is 1605°C and its density is 4.54 g/cm3. It reacts with water and so cannot be prepared by an aqueous precipitation method. It can be prepared by the reaction of the oxide with Se metal:
2SrO+ Se+ Heat ? SrSe+ SeO2
It can also be prepared by reducing the selenate with hydrogen gas:
SrSeO4 + 4H2 + heat ? SrSe+ 4H2O
Strontium selenide and barium selenide both have a simple cubic structure, with cube edges equal to 3.117? and 3.308 ?, respectively. In the case of SrSe, the ions at the corners are Sr++ and Se--。 | [Physical properties]
Phosphors can be categorized in accordance with
their behavior as fluorescent, phosphorescent or stimulable.
As used in this disclosure, such categories
should be understood as based upon the predominant
behavior of the phosphor at about room temperature,
i.e at about 20°C.
? A “stimulable” phosphor is one that, at room
temperature, stores energy absorbed upon exposure
to excitation by electromagnetic radiation and releases
the predominant portion of the stored energy upon
exposure to stimulating electromagnetic radiation.
? A phosphorescent phosphor at room temperature will
store absorbed energy for an appreciable time but will
release the predominant portion of the stored energy
spontaneously.
? A fluorescent phosphor will release the predominant
portion of the absorbed energy as emission radiant
energy substantially simultaneously with exposure to
the exciting radiant energy. | [Uses]
The major usage of SrSe has been as an infrared stimulable
phosphor. Photoluminescent materials useful for
detection of infrared light are prepared using a base material, such as SrSe. Up to three dopants, Sm3+,
cerium, Ce3+
and Eu2+
compounds are used for the
purpose of providing electron traps. The base material
can be a combination of alkaline earth metal selenides
such as strontium selenide, calcium selenide, or
a mixture of these. Luminescence is a long known
phenomenon of nature reaching back very far in history.
Recorded observations reach back to the last century.
Seeback and Becquerel observed momentary visible
afterglow in certain materials. | [Synthesis]
Pure SrSe is best obtainedfrom the selenite by high-temperature
reduction with NH3.
SrSeO3 + 2NH3 = SrSe + 3 H2O + N2 |
| Safety Data | Back Directory | [Hazard Codes ]
T,N | [Risk Statements ]
R23/25:Toxic by inhalation and if swallowed .
R33:Danger of cumulative effects.
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . | [Safety Statements ]
S20/21:When using, do not eat, drink or smoke .
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet . | [RIDADR ]
UN 3283 6.1/PG 3
| [WGK Germany ]
3
| [TSCA ]
Yes | [HazardClass ]
6.1 | [PackingGroup ]
III |
|
| Company Name: |
Alfa Aesar
|
| Tel: |
400-6106006 |
| Website: |
http://chemicals.thermofisher.cn |
| Company Name: |
Energy Chemical
|
| Tel: |
021-021-58432009 400-005-6266 |
| Website: |
http://www.energy-chemical.com |
|