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World 4 · Salt, diamond and layered carbon · 8 min · PRO

A tetrahedron of neighbours

PRO · Crystal Lab

World 4: Salt, diamond and layered carbon is part of PRO

The first world of Crystal Lab is free. PRO opens the other 24 lessons in 8 worlds — simulations, quizzes and all.

  • Two species, one repeating pattern
  • Three bonds in a sheet
  • Build a crystal by translation
  • A cell in wavevector space
  • Large cells, small reciprocal scales
PRO includes
  • All 26 labs — every world, every lesson
  • Practice exams and certificates

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