Manganese (II) telluride

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Crystal structure
Crystal structure of manganese (II) telluride
__ Mn 2+      __ Te 2−
General
Surname Manganese (II) telluride
other names
  • Manganese telluride
  • Manganese monotelluride
Ratio formula MnTe
Brief description

dark gray solid

External identifiers / databases
CAS number 12032-88-1
EC number 234-782-1
ECHA InfoCard 100.031.607
PubChem 82828
Wikidata Q6748770
properties
Molar mass 182.54 g mol −1
Physical state

firmly

density

6.0 g cm −3

Melting point

1240 ° C

solubility
  • practically insoluble in water
  • soluble in concentrated nitric acid
safety instructions
GHS labeling of hazardous substances
07 - Warning

Caution

H and P phrases H: 302-332
P: 261-264-304 + 340-301 + 312-312-501
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. Template: room group / 194

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

  1. ↑ 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) .
  2. ^ 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).
  3. ↑ 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).
  4. ↑ 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).
  5. ↑ 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 .
  6. ↑ insa.nic.in: Electrical Transport Properties Of Manganese Telluride , accessed on July 6, 2016
  7. ↑ Usage Patterns for Tellurium Report . National Academies, 1969, pp. 8 ( limited preview in Google Book search).
  8. ^ ME Schlesinger: The Mn-Te (manganese-tellurium) system. In: Journal of Phase Equilibria. 19, 1998, p. 591, doi : 10.1361 / 105497198770341806 .