Table 1 Geometric parameters characterizing a regular tetrahedron and the corresponding characteristic wave numbers.

See Fig. 1A for the definition of the parameters.

Geometric parameterRelation with r in real spacePeak position k in reciprocal spaceScaled primary peak position kr/2π
LEmbedded ImageEmbedded ImageEmbedded Image
DEmbedded ImageEmbedded ImageEmbedded Image
H4r/32π/H = 3π/2r3/4