
%0 Journal Article
%A Rossell, HJ 
%A Leblanc, M 
%A Ferey, G 
%A Bevan, DJM 
%A Simpson, DJ 
%A Taylor, MR 
%T On the Crystal Structure of Bi<sub>2</sub>Te<sub>4</sub>O<sub>11</sub>
%J Australian Journal of Chemistry
%D 1992/09/01
%V 45
%N 9
%P 1415-1425
%K 
%R https://doi.org/10.1071/CH9921415
%U https://www.publish.csiro.au/paper/CH9921415 
%X Bi2Te4O11 is monoclinic, space group P21/n; the lattice parameters derived from a Guinier powder pattern ( Si standard) are: a = 6.9909(3), b = 7.9593(3), c = 18.8963(8) Å , &#946; = 95.176(3)º, Z = 4, V = 1047.15 Å. The structure was solved independently from both single-crystal X-ray data and a combination of X-ray and neutron powder data. It is an anion-deficient superstructure of fluorite in which can be recognized the ordered intergrowth of fluorite-type Bi2Te2O7 and rutile-type Te2O4. Lone-pair electrons are stereochemically active. 
