Evaporated aluminium film on 3mm grid

The nominal value of the effective camera length of an EM perating in the selected area mode is not sufficiently accurate for any calculations of grid spacing. The actual value of camera length must be calibrated as the equivalent accelerating voltage and objective lens setting by reference to a known substance with well defined diffraction spacings. 

The normal specimens are evaporated films on a 3.05mm grid of aluminium or thallous chloride. The very small crystalline size yields ring patterns suitable for calibration purposes.

Code Title Pack Size Availability Price Updated: 05-12-2021
EMS80044 Evaporated aluminium film on 3mm grid Each 2 weeks $71.00 AUD