Telluride phosphide

The telluride phosphides are a class of mixed anion compounds containing both telluride and phosphide ions (Te²⁻ P³⁻). The phosphidotelluride or telluridophosphide compounds have a [TeP]³⁻ group in which the tellurium atom has a bond to the phosphorus atom. A formal charge of −2 is on the phosphorus and −1 on the tellurium. There is no binary compound of tellurium and phosphorus. Not many telluride phosphides are known, but they have been discovered for noble metals, actinides, and group 4 elements.

Structure

The titanium group elements form layered hexagonal crystals that can be exfoliated to monolayers. These contain ditelluride Te₂^2- units.^[1] These layered compounds can be intercalated to form non-stoichiometric compounds with zinc, copper or cadmium by heating with the metals.^[2] Actinide telluride phosphides contain diphosphide anions P₂.^[3]

List

name	formula	MW	ratio Te:P	system	space group	unit cell Å	volume	density	optical	band gap		CAS	references
	P4S2Te			molecular									[4][5]
	P4STe2			molecular									[4][5]
	Ti2PTe2			hexagonal	R3m	a=3.6387 c=28.486			metallic	on c axis	also monolayer		[4]
	MnxTi2PTe2				R3m1	a=3.648 c=9.628							[6]
	FexTi2PTe2				R3m1	a=3.6356 c=9.639							[6]
	Cu0.282Ti2PTe2				R3m1	a=3.6726 c=9.7822							[6]
	Zn0.36Ti2PTe2				R3m1	a=3.6917 c=9.8480							[6]
	CdxTi2PTe2				R3m1	a=3.6806 c=10.238							[6]
	Zr2PTe2			rhombohedral	R3m	a=3.8117 c=29.189 Z=3	367.27	6.356	black		also monolayer		[7]
	CuxZr2PTe2				R3m1	a=3.8445 c=10.1082							[6]
	Zn0.337Zr2PTe2				R3m1	a=3.85873 c=10.1664							[6]
	Cd0.194Zr2PTe2				R3m1	a=3.8469 c=10.4197							[6]
	RuTeP												[8]
	BaP4Te			orthorhombic	Pnma with	a =16.486 b =6.484 c =7.076 Z =4							[4][9]
	CeP0.4Te1.6												[4]
	CeP1.1Te0.9												[4]
cerium phosphide telluride	Ce3Te3P		3:1										[10]
	Hf2Te2P				R3m	a=3.7946 c=29.14					also monolayer		[1]
	IrTeP			orthorhombic		a=6.030 b=6.131 c=12.132							[11]
	OsTeP		1:1	arsenopyrite structure	P21/c	a = 6.2291 b = 6.1604 c = 6.2449 β = 112.01°	222.2	10.43					[12]
	ThPTe		1:1	tetragonal		a = 4.2505 and c = 17.268							[13]
	UPTe			tetragonal		a=4.100 c=17.026							[13]
	U2PTe2O			pseudo tetragonal		a = 40.37c = 32.07
	NpPTe			tetragonal	P4/nmm	a=4.265 c=9.067							[13]
	PuPTe			tetragonal	P4/nmm	a=4.289 c=9.098							[13]
	AmPTe			tetragonal	P4/nmm	a=4.269 c=9.050							[13]