1. N EGATIVE THERMAL EXPANSION OF ZEOLITES PROJECT BY SINEAD, ILARIA, ISSY, DAVE AND SID

2. W HAT ARE Z EOLITES ? Zeolites are microporous crystalline solids with well-defined structures.

3. Z EOLITES THAT WE LOOKED AT

4. Do SBE, MRE and RHO show negative thermal expansion?

5. Generally, materials expand when heated because the particles gain kinetic energy and so vibrate more. Some of theses zeolites decrease in volume when heated.

6. H OW WE DID IT We collected data about the zeolite structures All the operations were done on the Linux operating system The number of SI and O atoms were entered, and we changed certain variables to run the test. The data was then analysed.

7. SBE

9. MRE

11. “Zeolite RHO has an unusual three dimensional monolayer surface with a topology that gives equal access to either side of the surface.”

15. C ONCLUSIONS

16. THE END!!