Terbium phosphide
{{Short description|Erbium compound}}
{{Chembox
| ImageFile = NaCl polyhedra.svg
| ImageSize = 200px
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| IUPACName =
| OtherNames = Terbium monophosphide, phosphanylidyneterbium
| Section1 = {{Chembox Identifiers
| CASNo = 12037-64-8
| PubChem = 82855
| ChemSpiderID =
| EINECS = 234-861-0
| UNNumber =
| SMILES = P#[Tb]
| StdInChI= 1S/P.Tb
| StdInChIKey= YSYUNNARJACYRQ-UHFFFAOYSA-N
}}
| Section2 = {{Chembox Properties
| Tb=1|P=1
| Appearance = Black crystals
| Density = 6.82 g/cm3
| MolarMass = 189.899
| Solubility =
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| Section4 = {{Chembox Structure
| CrystalStruct = Cubic
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| Section7 = {{Chembox Hazards
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| Section9 = {{Chembox Related
| OtherAnions = Terbium nitride
Terbium arsenide
Terbium antimonide
Terbium bismuthide
| OtherCations = Gadolinium phosphide
Dysprosium phosphide
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Terbium phosphide is an inorganic compound of terbium and phosphorus with the chemical formula TbP.{{cite web |title=Terbium Phosphide |url=https://www.americanelements.com/terbium-phosphide-12037-64-8 |publisher=American Elements |access-date=9 January 2022 |language=en}}{{cite journal |last1=Knorr |first1=K. |last2=Loidl |first2=A. |last3=Kjems |first3=J. K. |last4=Lüthi |first4=B. |title=Magnetic excitations in TbP |journal=Journal of Magnetism and Magnetic Materials |date=2 December 1979 |volume=14 |issue=2 |pages=270–272 |doi=10.1016/0304-8853(79)90136-7 |bibcode=1979JMMM...14..270K |url=https://www.sciencedirect.com/science/article/abs/pii/0304885379901367 |access-date=9 January 2022 |language=en |issn=0304-8853}}
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.{{cite journal |last1=Rowley |first1=Adrian T. |last2=Parkin |first2=Ivan P. |title=Convenient synthesis of lanthanide and mixed lanthanide phosphides by solid-state routes involving sodium phosphide |journal=Journal of Materials Chemistry |date=1 January 1993 |volume=3 |issue=7 |pages=689–692 |doi=10.1039/JM9930300689 |url=https://pubs.rsc.org/en/content/articlelanding/1993/JM/jm9930300689 |access-date=9 January 2022 |language=en |issn=1364-5501|url-access=subscription }}
Physical properties
TbP undergoes a phase transition at 40 GPa from a NaCl-structure to a CsCl-structure.{{cite journal |last1=Adachi |first1=Takafumi |last2=Shirotani |first2=Ichimin |last3=Hayashi |first3=Junichi |last4=Shimomura |first4=Osamu |title=Phase transitions of lanthanide monophosphides with NaCl-type structure at high pressures |url=https://www.sciencedirect.com/science/article/abs/pii/S0375960198008408 |journal=Physics Letters A |access-date=9 January 2022 |pages=389–393 |language=en |doi=10.1016/S0375-9601(98)00840-8 |date=28 December 1998|volume=250 |issue=4–6 |bibcode=1998PhLA..250..389A |url-access=subscription }} The compound can be sintered with zinc sulfide to make a green phosphor layer.{{cite journal |last1=Raffius |first1=G. |last2=Kötzler |first2=J. |title=Field-dependence of the first-order phase transition in terbium phosphide |journal=Physics Letters A |date=7 February 1983 |volume=93 |issue=8 |pages=423–425 |doi=10.1016/0375-9601(83)90477-2 |bibcode=1983PhLA...93..423R |url=https://www.sciencedirect.com/science/article/abs/pii/0375960183904772 |access-date=9 January 2022 |language=en |issn=0375-9601|url-access=subscription }}
TbP forms crystals of a cubic system, space group Fm3m.{{cite web |title=Terbium Phosphide TbP |url=https://materialsproject.org/materials/mp-645/|publisher=materialsproject.org |access-date=24 December 2021}}
Uses
The compound is a semiconductor used in high power, high frequency applications and in laser diodes and other photo diodes.
References
{{Reflist}}
{{Phosphorus compounds}}
{{Terbium compounds}}
{{Phosphides}}