Crystal features and contact goniometer

2. Crystal features:
1. Face
2. Edge
3. Interfacial angles
4. Solid angles
5. Zones

3. Crystal Face and Edge

4. Interfacial Angle

5. Solid Angle

6. Zone:
A zone is defined as a group of crystal faces that intersect in parallel edges.

7. Contact Goniometer:
This is the instrument used to measure interfacial angle.

8. Waiting for your questions…….
Thank You