Titanium(III) phosphide

Chembox new
Name = Titanium(III) phosphide
ImageFile =
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OtherNames = titanium monophosphide
Section1 = Chembox Identifiers
CASNo = 12037-65-9
Section2 = Chembox Properties
Formula = TiP
MolarMass = 78.841 g/mol
Appearance = gray crystals
Density = 4.08 g/cm³, solid D.L. Perry S.L. Phillips (1995) "Handbook of inorganic compounds" CRC Press ISBN 0849386713]
MeltingPt = >1400°C
BoilingPt =
Section3 = Chembox Structure
CrystalStruct = hexagonal
Section7 = Chembox Hazards
EUClass = not listed

Titanium(III) phosphide (TiP) is an inorganic chemical compound of titanium and phosphorus. Normally encountered as a grey powder , it is high melting and a metallic conductor. H.G. Von Schnering, W. Hönle "Phosphides - Solid state chemistry" Encyclopedia of Inorganic Chemistry Ed. R. Bruce King (1994) John wiley & Sons ISBN 0 471 93620 0 ] . It is not attacked by common acids or water. Its physical properties contrast to the group 1 and group 2 phosphides that contain the P³⁻ anion , (e.g. Na₃P), which are not metallic and are readily hydrolysed. Titanium phosphide is classified as a "metal rich phosphide", and in these 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 e.g. Ti₃P [Hydrogen absorption in Ti₃P Halter U., Mrowietz M., Weiss A Journal of the less-common metals 1986 118 343-348] , Ti₂P [ 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 Cryst. (2003). A59, 117-126 doi|10.1107/S0108767302022559] Ti₇P₄ [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] , Ti₅P₃ [Crystal Structure Refinement of Ti₅P₃ Carrillo C W., Lundström T Acta Chemica Scandinavica, Series A: Physical and Inorganic Chemistry 1980 34 415-419] Ti₄P₃ [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] Note that titanium phosphide should not be confused with titanium phosphate(see e.g. [ "Lamellar inorganic ion exchangers. H⁺/Cs⁺ ion exchange in γ-titanium phosphate" E.González, R. Llavona, J. R. Garcia and J. Rodríguez J. Chem. Soc., Dalton Trans., (1989), 1825 - 1829, doi|10.1039/DT9890001825] ) or titanium isopropoxide (see e.g. [Synthesis of TiC-C fiber from titanium isopropoxide treated phenolic resin fiber M Narisawa, S Kida, T Simoo, K Okamura1 and Y KurachiJournal of Sol-Gel Science and Technology 4, 1 (1995) 31-35 doi|10.1007/BF00486700] ) which are both confusingly sometimes known by the acronym TIP

References