Manganese (II) telluride
Crystal structure | ||||||||||||||||
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__ Mn 2+ __ Te 2− | ||||||||||||||||
General | ||||||||||||||||
Surname | Manganese (II) telluride | |||||||||||||||
other names |
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Ratio formula | MnTe | |||||||||||||||
Brief description |
dark gray solid |
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properties | ||||||||||||||||
Molar mass | 182.54 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
6.0 g cm −3 |
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Melting point |
1240 ° C |
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solubility |
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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 . |
Manganese (II) telluride is an inorganic chemical compound of manganese from the group of tellurides .
Extraction and presentation
Manganese (II) telluride can be obtained by reacting stoichiometric amounts of manganese with tellurium at around 700 ° C. The resulting traces of manganese titelluride must then be removed.
properties
Manganese (II) telluride is a dark gray solid that is practically insoluble in water. It is a semiconductor and has a hexagonal crystal structure of the nickel arsenide type with the space group P 6 3 / mmc (space group no. 194) at room temperature . At between 35 and 55 ° C, depending on the source, there is a transition between antiferromagnetic to paramagnetic ). Phase transitions to other crystal structures take place at 955 ° C (hexagonal of the wurtzite type), 1020 ° C (cubic sphalerite structure ) and 1055 ° C (cubic sodium chloride structure ). Two further crystal structures arise at high pressures of 10 and 24 GPa.
use
Manganese (II) telluride is used in research. It is also found in some types of steel.
Related links
In addition to manganese (II) telluride is Manganditellurid (MnTe 2 ) at least one further Mangantellurid known.
Individual evidence
- ↑ a b c d e f g data sheet Manganese telluride, 99.9% (metals basis) from AlfaAesar, accessed on July 6, 2016 ( PDF )(JavaScript required) .
- ^ A b Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 266 ( limited preview in Google Book search).
- ↑ a b Evgenii Yugevich Tonkov: High Pressure Phase Transformations A Handbook . CRC Press, 1992, ISBN 978-2-88124-759-0 , pp. 555 ( limited preview in Google Book search).
- ↑ a b Jane E. Macintyre: Dictionary of Inorganic Compounds . CRC Press, 1992, ISBN 978-0-412-30120-9 , pp. 3583 ( limited preview in Google Book Search).
- ↑ Nobuhiko Kunitomi, Yoshikazu Hamaguchi, Shuichiro Anzai: Neutron diffraction study on manganese telluride. In: Journal de Physique. 25, 1964, p. 568, doi : 10.1051 / jphys: 01964002505056800 .
- ↑ insa.nic.in: Electrical Transport Properties Of Manganese Telluride , accessed on July 6, 2016
- ↑ Usage Patterns for Tellurium Report . National Academies, 1969, pp. 8 ( limited preview in Google Book search).
- ^ ME Schlesinger: The Mn-Te (manganese-tellurium) system. In: Journal of Phase Equilibria. 19, 1998, p. 591, doi : 10.1361 / 105497198770341806 .