The section of the card outlined in red shows the table of d spacings and I/I₁ values plus the peak hkl indices. It represents the "fingerprint" of this particular material.

Note that when the database was produced in card format (as shown here), this listing could extend to more than one physical card: the electronic database does not have this problem.

©ICDD 1967. Used with permission from the International Centre for Diffraction Data.

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