Teaching Mineralogy with Crystal Structure Databases and Visualization Software
Integrating Research and Education > Crystallography > Directed Discovery of Crystal Structures > Crystal Structures > Calcite

Calcite

Download the structure for interactive viewing

Choose one of the options below, based on which program you want to view the structure with.

For viewing with the demo version of CrystalMaker (more info) ,
Sorry, no compatible files found on the internet.
For viewing with the commercial version of CrystalMaker (more info) ,
Open the Crystal Structures Library on the CrystalMaker disc, and click on Minerals > Non-Silicates > Carbonates > Calcite.

For viewing with XtalDraw (more info) ,
Click on the CALCITE file in the XtalDraw folder.
For viewing in a web browser,
Go to Crystal Structures (more info) and choose "Calcite lattice", which is listed under "Some common non-cubic lattices". This resource is currently off-line. Please check back at a later date.

Questions

  1. What is the coordination number of C in calcite? Why does it not have a higher CN?
  2. What is the radius ratio (cation/anion) for calcite?
  3. How are the Ca atoms and carbonate complexes arranged in the calcite structure?
  4. Look down the axis of the rhomb (body diagonal). What is the symmetry? Is this consistent with the bond angles in the carbonate complexes?

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