Terbium phosphide

Terbium phosphide is an inorganic compound of terbium and phosphorus with the chemical formula TbP.^[1][2]

Terbium phosphide

Names
Other names Terbium monophosphide, phosphanylidyneterbium
Identifiers
CAS Number	12037-64-8
3D model (JSmol)	Interactive image
EC Number	234-861-0
PubChem CID	82855
InChI InChI=1S/P.Tb Key: YSYUNNARJACYRQ-UHFFFAOYSA-N
SMILES P#[Tb]
Properties
Chemical formula	PTb
Molar mass	189.899
Appearance	Black crystals
Density	6.82 g/cm3
Structure
Crystal structure	Cubic
Related compounds
Other anions	Terbium nitride Terbium arsenide Terbium antimonide Terbium bismuthide
Other cations	Gadolinium phosphide Dysprosium phosphide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

TbP can be obtained by the reaction of terbium and red phosphorus at 800–1000 °C:

4 Tb + P₄ → 4 TbP

The compound can also be obtained by the reaction of sodium phosphide and anhydrous terbium chloride at 700~800 °C.^[3]

Physical properties

TbP undergoes a phase transition at 40 GPa from a NaCl-structure to a CsCl-structure.^[4] The compound can be sintered with zinc sulfide to make a green phosphor layer.^[5]

TbP forms crystals of a cubic system, space group Fm3m.^[6]

Uses

The compound is a semiconductor used in high power, high frequency applications and in laser diodes and other photo diodes.^[1]