Potassium phosphide

Potassium phosphide
	; Crystal structure of potassium phosphide (K3P)
Names
	Other names Tripotassium;phosphanide; Tripotassium;phosphorus(3-); Tripotassium phosphide;
Identifiers
CAS Number	20770-41-6;
3D model (JSmol)	Interactive image;
ChemSpider	11219118;
EC Number	244-021-5;
PubChem CID	22182308;
UNII	2F09226A2C;
CompTox Dashboard (EPA)	DTXSID6066652;
	InChI InChI=1S/3K.P/q3*+1;-3 Key: YCIITCDBMPCIPR-UHFFFAOYSA-N;
	SMILES [P-3].[K+].[K+].[K+];
Properties
Chemical formula	K3P
Molar mass	148.269 g mol−1
Appearance	Green crystalline solid or powder
Thermochemistry
Std molar; entropy (So298)	49.8 J mol−1 K−1
Std enthalpy of; formation (ΔfH⦵298)	−1.77 kJ mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Potassium phosphide is an inorganic semiconductor compound with the formula K₃P. It appears as a green crystalline solid or powder.^[2] It reacts violently with water (even on contact with air) and is toxic via ingestion, inhalation and skin absorption.^[3] It has a hexagonal structure.^[1]

Synthesis

Potassium phosphide can be synthesised by a reaction under controlled conditions starting from the two elements. Simply fusing potassium and phorsphorus does not yield pure K₃P:^[4]

12 K + P
4 → 4 K
3P

Applications

Potassium phosphide is used in high power, high frequency applications and also in laser diodes. ^[2]

References

↑ ^1.0 ^1.1 Sangster, James M. (2010-02-01). "K-P (Potassium-Phosphorus) System" (in en). Journal of Phase Equilibria and Diffusion 31 (1): 68–72. doi:10.1007/s11669-009-9614-y. ISSN 1863-7345. Bibcode: 2010JPED...31...68S.
↑ ^2.0 ^2.1 Elements, American. "Potassium Phosphide" (in en). https://www.americanelements.com/potassium-phosphide-20770-41-6.
↑ "POTASSIUM PHOSPHIDE | CAMEO Chemicals | NOAA". https://cameochemicals.noaa.gov/chemical/4327.
↑ Gnutzmann, Geert; Wilhelm Dorn, Friedrich; Klemm, Wilhelm (1961). "Das Verhalten der Alkalimetalle zu Halbmetallen. VII. Über einige A3B- und AB2-Verbindungen der schweren Alkalimetalle mit Elementen der V. Gruppe" (in de). Zeitschrift für anorganische und allgemeine Chemie 309 (3–4): 210–225. doi:10.1002/zaac.19613090308. ISSN 0044-2313. https://onlinelibrary.wiley.com/doi/10.1002/zaac.19613090308.

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Original source: https://en.wikipedia.org/wiki/Potassium phosphide. Read more

[Sangster-1] 1.0 ^1.1 Sangster, James M. (2010-02-01). "K-P (Potassium-Phosphorus) System" (in en). Journal of Phase Equilibria and Diffusion 31 (1): 68–72. doi:10.1007/s11669-009-9614-y. ISSN 1863-7345. Bibcode: 2010JPED...31...68S.

[AE-2] 2.0 ^2.1 Elements, American. "Potassium Phosphide" (in en). https://www.americanelements.com/potassium-phosphide-20770-41-6.

[3] "POTASSIUM PHOSPHIDE | CAMEO Chemicals | NOAA". https://cameochemicals.noaa.gov/chemical/4327.

[4] Gnutzmann, Geert; Wilhelm Dorn, Friedrich; Klemm, Wilhelm (1961). "Das Verhalten der Alkalimetalle zu Halbmetallen. VII. Über einige A3B- und AB2-Verbindungen der schweren Alkalimetalle mit Elementen der V. Gruppe" (in de). Zeitschrift für anorganische und allgemeine Chemie 309 (3–4): 210–225. doi:10.1002/zaac.19613090308. ISSN 0044-2313. https://onlinelibrary.wiley.com/doi/10.1002/zaac.19613090308.

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Names
Crystal structure of potassium phosphide (K₃P)
Other names Tripotassium;phosphanide Tripotassium;phosphorus(3-) Tripotassium phosphide
Identifiers
CAS Number	20770-41-6
3D model (JSmol)	Interactive image
ChemSpider	11219118
EC Number	244-021-5
PubChem CID	22182308
UNII	2F09226A2C
CompTox Dashboard (EPA)	DTXSID6066652
InChI InChI=1S/3K.P/q3*+1;-3 Key: YCIITCDBMPCIPR-UHFFFAOYSA-N
SMILES [P-3].[K+].[K+].[K+]
Properties
Chemical formula	K₃P
Molar mass	148.269 g mol⁻¹
Appearance	Green crystalline solid or powder
Thermochemistry^[1]
Std molar entropy (S^o₂₉₈)	49.8 J mol⁻¹ K⁻¹
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−1.77 kJ mol⁻¹
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Potassium phosphide

Topic: Chemistry

Synthesis

Applications

References