# Homework Help: Name the crystal spinel from the image.

1. Jun 29, 2010

Hello, I appreciate your help in naming the structure of the molecular structure which image is attached. The answer should include the molecular formula and crystal structure characteristics.

Considering the distribution of atoms within the cell and that the caption below states the atomic components as A B and O, the image refers to a spinel structure. These type of crystals normally follow an AB2O4 composition. In the image, the A atoms are clearly following a FCC pattern, characteristic of the spinel, and the dashed lines between O atoms imply an octahedral arrangement within the cell.
Although it seems clear the type of arrangement, I cannot tell clearly the lattice characteristics since the FCC structure contains at least those other two which I'm not familiarized with.

Thanks for any clue here!

File size:
33 KB
Views:
104