Answers

2015-06-15T20:46:30+05:30
Unit cell is the smallest 3D part of a crystal lattice which when multiplied in its own dimensions in all directions gives the complete structure of the crystal lattice. 
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  • Brainly User
2015-06-15T22:03:16+05:30
The smallest group of atoms which has the overall symmetry of a crystal
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