This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
 

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Table 3567a. Interplanar crystal spacing (d) of the seven crystal families.

Triclinic
Monoclinic
Trigonal
Orthorhombic
Tetragonal
Hexagonal
Cubic

Table 3567b. Packing density in some crystal planes and their interplanar distances in particular crystal structures.

Crystal structure	Plane	Packing density	Interplanar distance
BCC	Dodecahedral {110}
	Octahedral {111}
	Trisoctahedral {112}
	Dioctahedral {123}
FCC	Octahedral {111}
	Cubic {100}
	Dodecahedral {110}
HCP	Basal {0001}
	Prismatic {10-10}
	Pyramidal {10-11}

The radius of the HOLZ rings is given by the interception of the Ewald sphere with the allowed HOLZ spots of the reciprocal lattice. In practice, the radius of the HOLZ ring is a direct measure of the interplanar spacing of the crystal along the direction of the directly transmitted electron beam. And, the interplanar spacing of the crystal can be approximately given by,

          H = 2L²λ/r² ----------------------------------- [3567]

where,
          L -- The camera length,
          λ -- The wavelength of the electron beam,
          r -- The radius of the HOLZ rings.