Electron microscopy
Triangular Lattice
- Practical Electron Microscopy and Database -
- An Online Book -
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This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.


According to Radius Ratio Rule, the limiting cation-to-anion radius ratios for triangular ionic lattices can be obtained as shown in Table 3127.

Table 3127. Cation-to-anion radius ratios (r+/r-) for coordination number (CN) 3.

Crystal type
Geometric shape

Material examples and their r+/r-

0.155 - 0.225
3 Triangular
CO3, NO3, BO3, B2CO3




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