Thallium azide

Thallium azide, TlN₃, 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.

Thallium azide

Names
Other names thallium azide
Identifiers
CAS Number	53027-05-7^Y
3D model (JSmol)	Interactive image
ChemSpider	15368504^Y
PubChem CID	22764821
CompTox Dashboard (EPA)	DTXSID00628243
InChI InChI=1S/N3.Tl/c1-3-2;/q-1;+1^Y Key: GMUSFHMEMWCQIE-UHFFFAOYSA-N^Y InChI=1/N3.Tl/c1-3-2;/q-1;+1 Key: GMUSFHMEMWCQIE-UHFFFAOYAP
SMILES [Tl+].[N-]=[N+]=[N-]
Properties
Chemical formula	TlN3
Molar mass	246.4035
Appearance	yellow-brown
Solubility in water	insoluble
Structure
Crystal structure	Tetragonal, tI16 [1]
Space group	I4/mcm, No. 140
Hazards
Main hazards	very toxic
EU classification (DSD) (outdated)	T+ E C N
NFPA 704 (fire diamond)	0 4 3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is ^YN ?)
Infobox references

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.

TlN₃, KN₃, RbN₃, and CsN₃ 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]

Coordination sphere of azide in K,Rb,Cs,TlN₃.

Safety

All thallium compounds are poisonous and should be handled with care; avoid breathing any dust or fumes.

References

1. 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.
2. 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

Salts and covalent derivatives of the azide ion
HN3																	He
LiN3	Be(N3)2											B(N3)3	CH3N3, C(N3)4	N(N3)3,H2N—N3	O	FN3	Ne
NaN3	Mg(N3)2											Al(N3)3	Si(N3)4	P	SO2(N3)2	ClN3	Ar
KN3	Ca(N3)2	Sc(N3)3	Ti(N3)4	VO(N3)3	Cr(N3)3, CrO2(N3)2	Mn(N3)2	Fe(N3)2, Fe(N3)3	Co(N3)2, Co(N3)3	Ni(N3)2	CuN3, Cu(N3)2	Zn(N3)2	Ga(N3)3	Ge	As	Se(N3)4	BrN3	Kr
RbN3	Sr(N3)2	Y	Zr(N3)4	Nb	Mo	Tc	Ru(N3)6^3−	Rh(N3)6^3−	Pd(N3)2	AgN3	Cd(N3)2	In	Sn	Sb	Te	IN3	Xe(N3)2
CsN3	Ba(N3)2		Hf	Ta	W	Re	Os	Ir(N3)6^3−	Pt(N3)6^2−	Au(N3)4^−	Hg2(N3)2, Hg(N3)2	TlN3	Pb(N3)2	Bi(N3)3	Po	At	Rn
Fr	Ra(N3)2		Rf	Db	Sg	Bh	Hs	Mt	Ds	Rg	Cn	Nh	Fl	Mc	Lv	Ts	Og
		↓
		La	Ce(N3)3, Ce(N3)4	Pr	Nd	Pm	Sm	Eu	Gd(N3)3	Tb	Dy	Ho	Er	Tm	Yb	Lu
		Ac	Th	Pa	UO2(N3)2	Np	Pu	Am	Cm	Bk	Cf	Es	Fm	Md	No	Lr