Electron microscopy
 
d-Spacing Ratios of Allowed Bragg Reflections for Some Space Groups
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Table 1896. d-spacing ratios of allowed Bragg reflections for some space groups.

Space group/structure d-spacing ratios of allowed Bragg reflections
Lamellar 1, 2, 3, 4, 5, 6, 7, ...
Ia-3d (230) 1, √6, √8, √14, √20, √22, √24, √26, √30, √32, √38, ...
Im-3m (229)/bcc 1, √2, √4, √6, √8, √10, √12, √14, √16, √18, √20, ...
Fd-3m (227) 1, √3, √8, √11, √12, √16, √19, √24, √27, √32, √43, ...
Fm-3m (225)/fcc 1, √3, √4, √8, √11, √12, √16, √19, √20, √24, √27, ...
Pn-3m (224) 1, √2, √3, √4, √6, √8, √9, √10, √11, √12, √14, √16, ...
Pm-3n (223) 1, √2, √4, √5, √6, √8, √10, √12, √13, √14, √16, ...
P63/mmc (194) 1, √(4/3), √(4/R2), √(4/3+1/R2), √(4/3+4/R2), √4, ... (R=1.6)

 

 

 

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