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Taylor’s double-cone electrospray scheme. Pressurized vessels are indicated showing the platinum wire used as electrical contact for the inner liquid.
(a). HRTEM micrograph from a spherical particle. (b) Fast Fourier transform from the previous image indexed as the  -tysonite zone axis.
(a). Transmission electron micrograph from a nanocrystal. (b) High resolution magnification from previous figure showing the microdomain constitution of the nanocrystal. (c) FFT obtained from the image of Fig. 2(a) indexed as two twins of tysonite along the  zone axis indicated by arrows and arrowheads. (d) Image reconstructed with all the first order reflections from the main twin. (e) Image reconstructed with all the first order reflections from the secondary twin. (f) Image reconstructed with only the 100 reflection pair of the main twin to show the mosaicity of the nanocrystal.
Lattice spacings measured by TEM observations compared with tysonite lattice spacings.
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