High-Pressure Behavior and Polymorphism of Titanium Oxynitride Phase Ti2.85O4N.
J PHYS CHEM C
8546 - 8551.
We report a crystallographic study of Ti2.85O4N, a new titanium oxynitride phase discovered using chemical vapor deposition and combinatorial chemistry techniques, under high-pressure conditions. Synchrotron X-ray diffraction was used to monitor structural changes in the material during compression up to 68 GPa. The data indicate that the orthorhombic (Cmcm) ambient-pressure phase (K-0 = 154 +/- 22 GPa with K-0' = 5.2 +/- 0.5) undergoes a first-order transition at 18 GPa to a new orthorhombic (Pmc2(1)) structure. This new high-pressure polymorph remains stable up to 42 GPa, after which the emergence of a second high-pressure monoclinic (P2(1)/c) phase is observed.
|Title:||High-Pressure Behavior and Polymorphism of Titanium Oxynitride Phase Ti2.85O4N|
|Keywords:||CHEMICAL-VAPOR-DEPOSITION, VISIBLE-LIGHT, X-RAY, NITROGEN, TI3O5, RAMAN, PHOTOCATALYST, SPECTROSCOPY, DIFFRACTION, TRANSITIONS|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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