PLLA 4D-STEM scanning nanobeam diffraction dataset

4D STEM data set of a thin slice of annealed poly(L-lactic acid) (PLLA) taken with a scanning nanobeam in a scanning transmission electron microscope. The data were recorded with an ELA direct detection device (DECTRS AG, Baden, Switzerland) in a CEFID electron energy loss spectrometer (CEOS GmbH, Heidelberg, Germany) in energy-filtered mode. The data are compressed. The uncompressed data (approximately 16 GB) is stored in the MRC .mrc format as 32bit float, the standard MRC float data type. The date is raw binary type, with a header of 1024 byte. The 4D dataset of 128x128x512x512 array elements is saved as a 3D series of (128x128)x512x512 elements.