Chemistry:Thallium azide
| File:KN3viewCropped.tif | |
| Names | |
|---|---|
| IUPAC name
Thallium(I) azide
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| Other names
thallium azide
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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| Properties | |
| TlN 3 | |
| Molar mass | 246.40 g·mol−1 |
| Appearance | yellow-brown crystals |
| insoluble | |
| Structure | |
| Tetragonal, tI16[1] | |
| I4/mcm, No. 140 | |
| Hazards | |
| Main hazards | very toxic |
| GHS pictograms |    
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| GHS Signal word | Danger |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
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Thallium azide, TlN
3, is a yellow-brown crystalline solid poorly soluble in water. Although it is not nearly as sensitive to shock or friction as lead azide, it can easily be detonated by a flame or spark. It can be stored safely dry in a closed non-metallic container.
Preparation and structure
Thallium azide can be prepared treating an aqueous solution of thallium(I) sulfate with sodium azide. Thallium azide will precipitate; the yield can be maximized by cooling.
TlN
3, KN
3, RbN
3, and CsN
3 adopt the same structures. The azide is bound to eight cations in an eclipsed orientation. The cations are bound to eight terminal N centers.[2]
File:AzideCoordinationCropped.tif
Safety
All thallium compounds are poisonous and should be handled with care; avoid breathing any dust or fumes.
References
- ↑ Mauer F.A.; Hubbard C.R.; Hahn T.A. (1973). "Thermal expansion and low temperature phase transition of thallous azide". J. Chem. Phys. 59 (7): 3770–3776. doi:10.1063/1.1680549. Bibcode: 1973JChPh..59.3770M.
- ↑ Ulrich Müller "Verfeinerung der Kristallstrukturen von KN3, RbN3, CsN3 und TIN3" Zeitschrift für anorganische und allgemeine Chemie 1972, Volume 392, 159–166. doi:10.1002/zaac.19723920207
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