Telluride iodide explained

The telluride iodides are chemical compounds that contain both telluride ions (Te²⁻) and iodide ions (I⁻). They are in the class of mixed anion compounds or chalcogenide halides.^[1]

Tellurium does not normally bond with iodine, but can form many different units with bonds to other tellurium atoms.

List

name	formula	system	space group	unit cell	volume	density	properties	ref
Copper telluride iodide	CuTeI	tetrahedral	I41/amd	a = 17.170, c = 4.876, and Z = 16			Cu^+1 ion conductor; metallic grey	^[2] ^[3]
	(CuI)3Cu2TeS3		P3121
gallium telluride iodide	GaTeI	orthorhombic					band gap 2.55
	Ge40.0Te5.3I8	cubic	Pmn	a=10.815 Z = 1	1265.0	6.023	band gap 0.8 eV; clathrate	^[4]
α-Arsenic telluride iodide	AsTeI	monoclinic	P21	a=8.965 b=4.042 c=10.341 β=90.75 Z=4		5.84	melt 281°C black	^[5]
β-Arsenic telluride iodide	AsTeI	cubic	Fm3m	a=5.791 Z=2		5.63	black metallic
	As4Te5I2	monoclinic		a=14.58 b=4.00 c=12.26 β=95.0 Z=2		5.51	melt 303 °C metallic
triniobium telluride heptaiodide	Nb3TeI7
	NbTe4I		P21/c	a=7.695 b=15.393 c=13.438 β=100.84 Z=8	1563.2	6.205	black metallic	^[6]
diniobium hexatelluride iodide	Nb2Te6I		P21/c	a=9.197 b=13.387 c=9.651 β=112.36	1093.8	6.548		^[7]
	Nb4Te12I	monoclinic	C12/c1	a=21.957 b=6.147 c=19.925 β=122.40 Z=4	2270.6	5.8	black	^[8]
	Nb4Te17I4	monoclinic	C2/c	a = 16.199 b = 8.128 c = 27.355 β = 110.84°, Z = 4			black metallic	^[9]
	Mo3Tel0Il0
	[Mo<sub>3</sub>Se7(TeI<sub>3</sub>)I<sub>2</sub>]I	monoclinic	P23/n	a=10.4969 b=13.029 c=16.567 β =102.921° Z=4	2208.3	5.202		^[10]
	[Mo<sub>3</sub>Te<sub>7</sub>(TeI<sub>3</sub>)<sub>3</sub>]2(I)(TeI3)	triclinic	P	a=11.2148 b=11.6550 c=16.6798 α=92.124 β=102.223 γ=117.427 Z=	1868.4	5.374
Palladium telluride iodide	PdTeI			a=7.821 c=5.659			brass yellow	^[11] ^[12]
	Ag23Te12I	orthorhombic	Pnnm				honeycomb Te
	Ag19Te6Br5.4I1.6	orthorhombic	Pnma				electric conductor
indium telluride iodide	InTeI	monoclinic	P21/c					^[13]
Antimony telluride iodide	SbTeI	triclinic	P
	(Sb2Te2)I[AlI<sub>4</sub>]	monoclinic	P21/n
	La2TeI2	rhombohedral	Rm	a = 4.5074 c = 32.528 Z = 3			metallic	^[14]
	Er17.3Te24I8		Fd3m	a=12.020				^[15]
	Ta3TeI7	hexagonal	P63mc
	[TaTe<sub>4</sub>]4[PtI<sub>6</sub>]I2	triclinic	P	a=16.831 b=17.740 c=19.018 α=93.57 β=94.08 γ=102.09 Z=1	977.65			^[16]
	TaTe4I	triclinic	P	a=6.679 b=7.787 c=8.581 α=112.76 β=102.60 γ=101.25 Z=2	381.8	7.118	black
	W2Cl12Te6I2							^[17]
Gold telluride iodide	AuITe	monoclinic		a=7.317 b=7.626 c=7.249 β=106.33		7.73	semiconductor band gap 0.9 grey melt 360°C	^[18]
Gold telluride diiodide	AuITe2	orthorhombic	Pmmb	a = 4.056 Å, b = 12.579 Å, c = 4.741 Å, Z = 2	241.9	7.989	silvery white conductor melt 440°C	^[19]
	Hg3Te2I2						greyish red
	Hg3Te2BrI	monoclinic	C2	18.376 b=9.587 c=10.575 β=100.11°				^[20]
	Hg3TeI4	cubic	F3m	a=6.244 Z=(80% partial occupancy)	243.4	7.03	decompose 273°C dark ruby red	^[21]
Bismuth telluride iodide	BiTeI		P3m1 / Pnma				over 3.9 GPa Weyl semimetal; under semimetal
	ThTe2I2	monoclinic	C2/m	a  = 7.642 b  = 14.336 c  = 7.727 and β = 111.27° Z = 4				^[22]
	[Ta<sub>7</sub>(Se<sub>2</sub>)<sub>14</sub>][U<sub>2</sub>I<sub>10</sub>]2	orthorhombic	Cccm	a = 21.5134 b = 22.1619 and c = 16.7834 Z=4				^[23]

Notes and References

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