Holmium phosphide

Holmium phosphide is a binary inorganic compound of holmium and phosphorus with the chemical formula HoP.[1][2][3] The compound forms dark crystals and does not dissolve in water.[4]

Holmium phosphide
Other names
Phosphanylidyneholmium, holmium monophosphide
3D model (JSmol)
ECHA InfoCard 100.031.566 Edit this at Wikidata
EC Number
  • 234-737-6
  • InChI=1S/Ho.P
  • P#[Ho]
Molar mass 195.90
Appearance Dark crystals
Density g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).


Heating powdered holmium and red phosphorus in an inert atmosphere or vacuum:[5]



Holmium phosphide forms dark crystals of a cubic system, stable in air, does not dissolve in water.[4]

HoP belongs to the large class of NaCl-structured rare earth monopnictides.[6]

Ferromagnetic at low temperatures.[7][8]

HoP actively reacts with nitric acid.[citation needed]


The compound is a semiconductor used in high power, high frequency applications and in laser diodes.[3]


  1. ^ Toxic Substances Control Act (TSCA) Chemical Substance Inventory. Cumulative Supplement to the Initial Inventory: User Guide and Indices. United States Environmental Protection Agency. 1980. p. 170. Retrieved 23 December 2021.
  2. ^ Fischer, P.; Furrer, A.; Kaldis, E.; Kim, D.; Kjems, J. K.; Levy, P. M. (1 January 1985). "Phase diagrams and magnetic excitations in holmium phosphide". Physical Review B. 31 (1): 456–469. doi:10.1103/PhysRevB.31.456. PMID 9935448. Retrieved 23 December 2021.
  3. ^ a b "Holmium Phosphide". American Elements. Retrieved 23 December 2021.
  4. ^ a b Wang, Jian; Yox, Philip; Kovnir, Kirill (2020). "Flux Growth of Phosphide and Arsenide Crystals". Frontiers in Chemistry. 8: 186. doi:10.3389/fchem.2020.00186. ISSN 2296-2646. PMC 7142258. PMID 32300583.
  5. ^ Shurin, A. K.; Razumova, N. A. (1994-11-01). "Reaction of phosphorus with iron, cobalt, nickel, and manganese on heating". Powder Metallurgy and Metal Ceramics. 32 (11): 921–923. doi:10.1007/BF00559650. ISSN 1573-9066. S2CID 96679521.
  6. ^ Furrer, A. (6 December 2012). Crystal Field Effects in Metals and Alloys. Springer Science & Business Media. p. 24. ISBN 978-1-4615-8801-6. Retrieved 23 December 2021.
  7. ^ Fysikafdelingen, Forsøgsanlæg Risø (1983). Annual progress report. Risø National Laboratory. p. 11. ISBN 978-87-550-0960-8. Retrieved 23 December 2021.
  8. ^ Donnay, Joseph Désiré Hubert (1978). Crystal Data: Inorganic compounds 1967-1969. National Bureau of Standards. p. 71. Retrieved 23 December 2021.