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Mineralogical Magazine; April 2004; v. 68; no. 2; p. 279-300; DOI: 10.1180/0026461046820187
© Mineralogical Society of Great Britain and Ireland
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FIG. 3. (a) Electron diffraction pattern of cuprobismutite (Cbs) down [010]. Note slight streaking along the a* axis, due to intergrowths with paderaite (Pad). Satellite reflections corresponding to paderaite are arrowed. (b) High resolution transmission electron microscopy image of cuprobismutite with strips of paderaite (arrowed). The intergrowths are along the c axis of cuprobismutite and the a axis of paderaite (17 Å repeat axis). The white box marks the sequence: 5–2Cbs.Pad (Slab 2) as characteristic for disordered Cbs (see text). The image corresponds to the black box indicated on the low magnification strip at the bottom of the figure. Here we see a tendency towards a banding induced by variable combinations of Pad.(NCbs)1-3.Pad modules. The modules are shown as white (Pad) and grey (Cbs) bands at the top of the strip.





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