Titanium(III) phosphide

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Titanium(III) phosphide
Identifiers
CAS number 12037-65-9
PubChem 82856
EC number 234-862-6
Jmol-3D images Image 1
Properties
Molecular formula TiP
Molar mass 78.841 g/mol
Appearance gray crystals
Density 4.08 g/cm³, solid [1]
Melting point >1400°C [1]
Structure
Crystal structure hexagonal
Hazards
EU classification not listed
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references
Not to be confused with titanium phosphate.

Titanium(III) phosphide (TiP) is an inorganic chemical compound of titanium and phosphorus. Normally encountered as a grey powder,[1] it is a metallic conductor with a high melting point.[2] It is not attacked by common acids or water.[1] Its physical properties stand in contrast to the group 1 and group 2 phosphides that contain the P3− anion (such as Na3P), which are not metallic and are readily hydrolysed.[2] Titanium phosphide is classified as a "metal-rich phosphide", where extra valence electrons from the metal are delocalised.[2]

Titanium phosphide can be prepared by the reaction of TiCl4 and PH3.[1]

There are other titanium phosphide phases, including Ti3P,[3] Ti2P,[4] Ti7P4,[5] Ti5P3,[6] and Ti4P3.[7]

Titanium phosphide should not be confused with titanium phosphate or titanium isopropoxide, both of which are sometimes known by the acronym TIP.

References[edit]

  1. ^ a b c d e D.L. Perry S.L. Phillips (1995) Handbook of inorganic compounds CRC Press ISBN 0-8493-8671-3
  2. ^ a b c 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
  3. ^ Hydrogen absorption in Ti3P Halter U., Mrowietz M., Weiss A Journal of the less-common metals 1986 118 343-348
  4. ^ 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 PMID 12604849
  5. ^ 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
  6. ^ Crystal Structure Refinement of Ti5P3 Carrillo C W., Lundström T Acta Chemica Scandinavica, Series A: Physical and Inorganic Chemistry 1980 34 415-419
  7. ^ 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