Abstract
Rb x CrF 3 samples with x = 0.20, 0.25, 0.275 and 0.30 have been studied by selected-area electron diffraction and high-resolution electron microscopy. Four different structure types related to the hexagonal tungsten bronze structure were observed: type (i) with a =2√3 a HTB, b = b HTB and c = c HTB; type (ii) with a = a HTB, b = b HTB and c = 3 c HTB; type (iii) with a = a HTB, b = b HTB and c = 6 c HTB; and type (iv) with a = √3 a HTB, b = b HTB and c=3c HTB. The HREM images reveal an ordering of Rb atoms in the hexagonal tunnel sites. Images of models assuming certain ordered occupancies have been calculated and matched with those observed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have