Europium (II) selenide
Crystal structure | |||||||||||||
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General | |||||||||||||
Surname | Europium (II) selenide | ||||||||||||
other names |
Europium selenide |
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Ratio formula | EuSe | ||||||||||||
Brief description |
black-brown solid |
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External identifiers / databases | |||||||||||||
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properties | |||||||||||||
Molar mass | 230.92 g mol −1 | ||||||||||||
Physical state |
firmly |
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density |
6.52 g cm −3 |
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safety instructions | |||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Europium (II) selenide is an inorganic chemical compound of europium from the group of selenides .
Extraction and presentation
The europium (II) selenide is made from europium (II) chloride in an excess of selenium in a hydrogen stream at 600 ° C to react . To remove the excess selenium, the hydrogen stream is heated to 820 ° C.
properties
Europium (II) selenide crystallized cubic in the space group Fm 3 m (space group no. 225) with a = 619.5 pm with four formula units per unit cell and acts at a temperature below 7 K ferromagnetic .
Individual evidence
- ↑ a b c d W. Klemm, H. Senff: Measurements on two- and four-valued compounds of the rare earths. VIII. Chalcogenides of bivalent europium . In: Journal of Inorganic and General Chemistry . tape 241 , no. 2-3 , 1939, pp. 259-263 , doi : 10.1002 / zaac.19392410212 .
- ↑ a b Safety (MSDS) data for EuSe
- ^ Subhadra, KG; Raghavendra Rao, B .; Sirdeshmukh, DB: X-ray determination of the Debye-Waller factors and Debye temperatures of europium monochalcogenides . In: Pramana . tape 38 , no. 6 , 1992, pp. 681-683 , doi : 10.1007 / BF02875064 .
- ^ TR McGuire, MW Shafer: Ferromagnetic Europium Compounds . In: Journal of Applied Physics . tape 35 , no. 3 , 1964, pp. 985-988 , doi : 10.1063 / 1.1713568 .