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Titanium(III) phosphide (TiP) is an inorganic chemical compound of titanium and phosphorus. Normally encountered as a grey powder, it is a metallic conductor with a high melting point. It is not attacked by common acids or water. Its physical properties stand in contrast to the group 1 and group 2 phosphides that contain the P anion (such as Na3P), which are not metallic and are readily hydrolysed. Titanium phosphide is classified as a "metal-rich phosphide", where extra valence electrons from the metal are delocalised.
Titanium phosphide can be prepared by the reaction of TiCl4 and PH3.
There are other titanium phosphide phases, including Ti3P, Ti2P, Ti7P4, Ti5P3, and Ti4P3.
Titanium phosphide should not be confused with titanium phosphate or titanium isopropoxide, both of which are sometimes known by the acronym TIP.
References
^ D.L. Perry S.L. Phillips (1995) Handbook of inorganic compounds CRC Press ISBN0-8493-8671-3
^ H.G. Von Schnering, W. Hönle Phosphides - Solid state chemistry Encyclopedia of Inorganic Chemistry Ed. R. Bruce King (1994) John Wiley & Sons ISBN0-471-93620-0
Hydrogen absorption in Ti3P Halter U., Mrowietz M., Weiss A Journal of the less-common metals 1986 118 343-348
Structure of Ti2P solved by three-dimensional electron diffraction data collected with the precession technique and high-resolution electron microscopy M. Gemmi, X. D. Zou, S. Hovmöller, A. Migliori, M. Vennström and Y. Andersson Acta Crystallogr. (2003). A59, 117-126 doi:10.1107/S0108767302022559PMID12604849
New Phases in the Ti-P and Ti-Cu-P Systems, Carrillo C W., Lundström T Acta Chem.Scand., Series A: (1979), 33, 401-402
Crystal Structure Refinement of Ti5P3 Carrillo C W., Lundström T Acta Chemica Scandinavica, Series A: Physical and Inorganic Chemistry 1980 34 415-419
Phase Relationships in the Ti-P System with some Notes on the Crystal Structures of TiP2 and ZrP2, Snell P.O, Acta Chem. Scand. 1968 22 1942-1952
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