to replay the thumbnails, press "refresh" button in your web browser.
|
This animation shows how perovskite structure accomodate stress without decreasing the volume of the octahedra (yellow). By simply rotating the octahedra, you can see that the unit cell volume of perovskite decreases but the octahedra remain almost the same [full size]. |
 |
There are two different types of rotations you can think of for the distortion of perovskite. This animation shows that the sense of rotation is opposite between the front octahedral layer and the back octahedral layer. The octahedra at the right top of the structure was intentionally made naked to show that the Si-O bonds do not change during distortion [full size]. |
 |
There are two different types of rotations you can think of for the distortion of perovskite. This animation shows that the sense of rotation is same between the front octahedral layer and the back octahedral layer. The octahedra at the right top of the structure was intentionally made naked to show that the Si-O bonds do not change during distortion [full size]. |
 |
This animation shows oscillation of hydrogen atom (red) around the oxygen atoms (white spheres) below in brucite structure. Related discussion can be found in K. Catalli, S.-H. Shim, and V. B. Prakapenka (2008) A crystalline-to-crystalline phase transition in Ca(OH)2 at 8 GPa and room temperature. Geophysical Research Letters 35 L05312 and the papers cited there [full size]. |
 |
This animation shows a moving plate (gray) and a stationary plume (orange) forming a chain of sea mountains [full size]. |
Last updated: 10/08/2011 10:21 PM
