title: Titanium(III) phosphide
text: # Titanium(III) phosphide
  
  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 $P^{3−}$ anion (such as $Na_3P),$ 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 $TiCl_4$ and $PH_3.$
  
  There are other titanium phosphide phases, including $Ti_3P,$ $Ti_2P,$ $Ti_7P_4,$ $Ti_5P_3,$ and $Ti_4P_3.$
  
  Titanium phosphide should not be confused with titanium phosphate or titanium isopropoxide, both of which are sometimes known by the acronym TIP.
  
  