학술논문
Synthesis and Crystal Structure of the New Hollandite-like Channel Phase Rb0.73Cr5Te8
Document Type
Article
Author
Source
Journal of Solid State Chemistry; February 1996, Vol. 122 Issue: 1 p41-45, 5p
Subject
Language
ISSN
00224596; 1095726X
Abstract
The material Rb0.73Cr5Te8is a new channel-type structure prepared from the elements at 850°C. It crystallizes in the monoclinic space groupC2/mwith cell dimensionsa= 20.315(4),b= 3.931(1),c= 14.304(3)Å, and β = 139.77(1)°. The structure determination was performed on 1329 independant reflections (I> 3σ(I)) and refinement of 47 variables led to reliability factors ofR= 2.81% andRw= 3.29%. The structure is based upon the hollandite structure, and consists of CrTe2layers connected by CrTe6octahedra, resulting in the formation of channels along thebdirection. These channels are subsequently filled by rubidium. The structure described differs from those structures already determined for the other materials in the familyAM5X8in the mode of connection between the layers.