Phosphide iodide

Phosphide iodides or iodide phosphides are compounds containing anions composed of iodide (I⁻) and phosphide (P³⁻). They can be considered as mixed anion compounds. They are in the category of pnictidehalides. Related compounds include the phosphide chlorides, arsenide iodides antimonide iodides and phosphide bromides.

Phosphorus can form clusters or chains in these compounds, so that some are 1-dimensional or fibrous.

Phosphide iodides are often metallic, black or dark red in colour.

List

formula	system	space group	unit cell Å	volume	density	comment	ref
[Si40P6]I6.5	cubic	Pm3n	a=10.1293 Z=1	1039.3	3.412	clathrate	[1]
K4P21I	orthorhombic	Ccmm	a = 12.853; b = 21.795; c = 9.748 Z = 4	2730.7	2.271	ruby red;sensitive to air	[2]
Ca2PI	trigonal	R3m	a=4.30 c=22.17		3.2	yellow	[3]
Ca3PI3	cubic	I4132	a=12.31 Z=8		3.78	colourless	[3]
Cu2P3I2	monoclinic	P21c	a = 15.343, b = 12.925, c = 15.260, β = 116.38°, Z = 16			band gap 0.72 eV; Cu ion conductor	[4][5][6]
Cu3P15I2	monoclinic	P21/n	a=9.667, b=19.475, c=9.886, β =108.75(2)°, Z=4	1762.4		grey	[5][7]
(CuI)3P12	monoclinic	P21	a=12.846 b=13.857 c=9.651 β=109.43 Z=4	1620.2	3.866	shiny	[5]
(CuI)2P14	monoclinic	P21/c	a = 9.919, b = 9.718, c = 16.478, β = 105.71°, Z = 4	1529.0	3.539		[8]
(CuI)5P16S							[9]
(CuI)3P4S4	hexagonal	P63cm	a=19.082, c=6.691 Z=6	2109.9			[10]
(CuI)8P12	monoclinic	P121/c1	a=15.343, b=12.925, c=15.26, β=116.38		4.64		[11]
Ge38P8I8	Cubic	P43n	a=10.507			silvery	[12]
(CuI)5P16Se							[9]
(CuI)2P8Se3		Pbcm	a=9.1348 b=12.351 c=13.873 Z=4	1565.2	3.673	red; melt 408 °C; P8Se3 clusters	[13]
(CuI)3P4Se4	hexagonal	P63cm	a = 19.601, c = 6.7196, Z = 6			orange	[14]
Zn3PI3	cubic	F42m	a=5.945		4.87	dark grey; dec 300 °C	[15]
(ZnI2)6ZnSP4S3							[11]
(ZnI2)6ZnSeP4Se3	cubic	F43c	a=19.542	7463.1	4.325	brown	[11]
Rb4P21I	orthorhombic	Ccmm	a = 13.281; b = 21.868; c = 9.771 Z=4	2838.1	2.619	dark red	[2]
Sr2P7I	cubic	P213	a=10.25			dark red; contains heptaphosphanortricyclane	[16]
Zr6I14P	orthorhombic	Cmca					[17]
Ag2P3I2	monoclinic					Ag ion conductor	[4]
(AgI)2Ag3PS4	hexagonal	P63mc	a=7.395 c=12.224 Z=2	579.1		Ag ion conductor	[18]
Cd2P3I	monoclinic	C2/c	a=8.255 b=9.304 c=7.514 β =99.66				[19]
Cd3PI3	hexagonal	P63mc				band gap 2.44 eV	[20]
Cd4P2I3	orthorhombic	Pbca	a=12.890 b=12.725 c=12.654			P24−	[19]
SnIP						soft and flexible; double helix SnI+ and P−; band gap 1.9 eV	[21][22]
Sn24P19.3I8	cubic	Pm3n	a=10.9554				[23]
Sn24P19.3BrxI8−x	cubic	Pm3n					[24]
Sn24P19.3(2)ClyI8−y (y ≤ 0.8)	cubic	Pm3n					[24]
Sn20Zn4P20.8I8	cubic	Pm3n	a=10.883 Z=1				[25]
Sn17Zn7P22I8	cubic	Pm3n	a=10.8458 Z=1				[25]
Sn14In10P22I8	cubic	Pm3n	a=11.0450 Z=1	1347.4	5.535	black	[26]
Sn14In10P21.2I8		P42/m	a=24.745, c=11.067, Z=5	6776	5.521	black	[26]
[Ge30.5Sn7.7P7.75]I7.88	cubic	Pm3n	a=10.721 Z=1				[27]
Sn24AsxP19.3−xI8	cubic	Pm3n	a = 10.9358—11.1495				[28]
Cs0.35Zr6I14P	orthorhombic	Cmca	a=15.934 b=14.287 c=12.939 Z=4			black	[17]
Ba2P7I	monoclinic	P21/m	a=6.3538 b=6.8990 c=12.0392 β =95.515 Z=2	524.93	3.912	orange-yellow; water sensitive	[29]
Ba3P3I2	orthorhombic	Pnma	a = 17.195, b = 4.624, c = 14.272, Z = 4,				[30]
Ba5P5I3	monoclinic	C2/m	a = 42.664, b = 4.56.3, c = 9.431, β = 92.20, Z = 4				[30]
La2PI2	trigonal	P3m1	a=4.236 c=10.121 Z=1	157.25	4.95		[31]
Eu2PI		R3m	a = 4.445, c = 23.12.6, Z = 3				[32]
Eu2P7I	cubic	P213				dark red; contains heptaphosphanortricyclane; band gap 1.7 eV	[16]
Au7P10I	trigonal	P31m	a=6.180 c=11.122 Z=1				[33]
Hg9P5I6	monoclinic		a=13.112 b=12.486 c=17.031 β=119.90				[34]
Hg4ZnPI4	monoclinic	P21	a = 7.850, b = 12.719, c = 7.861, β = 119.52°, Z = 2			like Millon phases	[35]
Hg7Ag2P8I6	monoclinic	C12/m1	a=13.146 b=11.037 c=8.336 β=102.210 Z=2	1182.1	7.386	black	[36]
Hg12Ag41P88I41	cubic	Fm3	a=26.705 Z=4	19045	5.147	dark red; air stable; P113− clusters	[37]
HgAg6P20I2	monoclinic	P21/m	a = 6.718, b = 27.701, c = 7.383, β = 113.98°, Z = 2				[38]

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