If some has literature or article where it is mentioned How many no. of corner and edge share per unit cell in a TiO2 (B) Bronze phase of TiO2.
Anatase, Brookite and Rutile is well known but Bronze phase (TiO2-B) of TiO2 is being least study. I know edge share is 4 but how many corner is shared in TiO2-B phase in a unit cell not getting literature so please someone help me to find this information.
It seems that the bronze type phase is strongly related to anatase and brookite phases. Both of which are metastable at all temperatures and pressures. Effectively, as with brookite, the bronze phase can be considered to be an ordered form of distorted anatase. In order for TiO6 octahedra to assemble into a structure with a nominal stoichiometry of TiO2, all corners are shared (6), in each octahedra.
In fact it is incorrect to see this as edge or corner sharing in unit cells as you have phrased in your question. The sharing of edges and corners is considered in terms of TiO6 octahedra, which can be seen as the assembly units in any phase of TiO2. However these are not unit cells, in that they are not repeating crystallographic units..(neigbouring octahedra may have differeing orientations)
Dear Sir Dorian A H Hanaor
- I agreed about your statement but people have taken an extended matrix and explain the connectivity of distorted octahedron in TiO2.
- In a Bronze phase, there are Ti4+ ion in two distinct geometry one is in octahedron another is in square pyramidal geometry.
As you said defining it as per unit cell is not appropriate. I was curious to know more about what it is possible or not, so I put the question. Please find the article where people mentioned about the edge and corner-sharing taking the extended unit cell.
Let me know your opinion Sir,
Thank you
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