A reflection row is accepted only when spacing, wavelength, and map sources agree. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

The reflection row cites spacing and wavelength

The audit carries spacing 5 m and wavelength 6 m.

d=5 mλ=6 md=5\ \mathrm{m}\quad \lambda=6\ \mathrm{m}
X-ray crystallography auditReflection, map, ratio, and absence checks close one x-ray evidence claim.accepted=1

The reciprocal map remains the same source

The reflection's map source is the one with projected spot 2,2.

(2,2,1)(2,2)(2,2,1)\mapsto(2,2)
X-ray crystallography auditReflection, map, ratio, and absence checks close one x-ray evidence claim.accepted=1