Lanthanum phosphide

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Lanthanum phosphide
Names
Other names
Phosphanylidynelanthanum
Identifiers
3D model (JSmol)
ECHA InfoCard 100.042.515 Edit this at Wikidata
EC Number
  • 246-782-9
  • InChI=1S/La.P
    Key: GZHCNRONBGZNAH-UHFFFAOYSA-N
  • P#[La]
Properties
LaP
Molar mass 169.88
Appearance Black crystals
Density 5.2 g/cm3
Reacts with water
Structure
Cubic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Lanthanum phosphide is an inorganic compound of lanthanum and phosphorus with the chemical formula LaP.[1][2][3]

Synthesis[]

Heating lanthanum metal with excess phosphorus in a vacuum:[4]

La + P → LaP

Physical properties[]

The compound forms black crystals of a cubic system, space group Fm3m, cell parameters a = 0.601 nm, with number of formulas per unit cell Z = 4.

The crystals are very unstable and decompose in the open air.

Chemical properties[]

Lanthanum phosphide reacts with water, releasing highly toxic phosphine gas:

LaP + 3H2O → La(OH)3 + PH3

Uses[]

The compound is a semiconductor used in high power, high frequency applications, and in laser diodes.[1][5][6]

Lanthanum polyphosphide[]

In addition to the simple phosphide, LaP, lanthanum and phosphorus can also form phosphide-rich compounds such as LaP5[7] and LaP7.

References[]

  1. ^ a b "Lanthanum Phosphide". American Elements. Retrieved 21 December 2021.
  2. ^ NBS Monograph. National Bureau of Standards. 1959. p. 189. Retrieved 21 December 2021.
  3. ^ Standard X-ray Diffraction Powder Patterns. U.S. Department of Commerce, National Bureau of Standards. 1953. p. 69. Retrieved 21 December 2021.
  4. ^ Journal of General Chemistry of the U.S.S.R. in English Translation. Consultants Bureau. 1963. p. 2729. Retrieved 21 December 2021.
  5. ^ Lewis, Robert A. (30 March 2016). Hawley's Condensed Chemical Dictionary. John Wiley & Sons. ISBN 978-1-119-19372-2. Retrieved 21 December 2021.
  6. ^ O'Bannon, Loran (6 December 2012). Dictionary of Ceramic Science and Engineering. Springer Science & Business Media. p. 151. ISBN 978-1-4613-2655-7. Retrieved 21 December 2021.
  7. ^ Wichelhaus, W.; Schnering, H. (1976). "Zur Chemie und Strukturchemie der Phosphide und Polyphosphide. 12. Die Pentaphosphide des Lanthans und Neodyms, LaP5 und NdP5". Zeitschrift für Anorganische und Allgemeine Chemie. 419: 77–86. doi:10.1002/ZAAC.19764190113. S2CID 97289383. Retrieved 21 December 2021.
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