Table 1. Unit-cell parameters of potassium penicillin G determined by single-crystal X-ray diffraction and electron diffraction of single nanocrystals from a powder sample using our algorithm.

Sample	Method	a (Å)	b (Å)	c (Å)	α = β = γ (°)
Potassium penicillin G	X-ray diffraction (literature)	6.342	9.303	30.015	90
Potassium penicillin G	Electron diffraction	6.4	9.3	31	90
Sodium oxacillin	X-ray diffraction (literature)	7.342	10.303	26.7	90
Sodium oxacillin	Electron diffraction	7.3	10.1	27	90