English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The orthorhombic unit cell of Cu 4 Bi 4 S 9  crystals has dimensions:  a  = 11.589(5),  b  = 32.05(1),  c  = 3.951(5) Å; space group  Pbnm , and  Z  = 4. The structure, which has been determined with the symbolic addition procedure, contains, sulfur-sulfur bonds in a form of S 2  groups, as predicted from the valence rule with S–S distance of 2.095(17) Å. The structure can be described as an alternate stacking of Cu-S sheets and Bi-S slabs, parallel to (010). The Cu-S sheet is highly corrugated and built of links of four- and three-coordinated copper atoms which are closely related to those in the covellite structure. The links are, in fact, joined together by S–S bonds. The three-coordinated copper atom is not in the plane formed by three sulfur atoms but displaced from the plane by 0.48(1) Å; mean Cu–S distance is 2.25 Å. The Bi-S slabs consist of links of Bi-S polyhedra which are, in turn, closely related to those of the bismuthinite structure. The above feature of the structure thus offers a new example of sulfosalt structure which consists of fragments of two different kinds of simpler sulfide structures.

The structure of Cu 4 Bi 4 S 9 and its relation to the structures of covellite, CuS and bismuthinite, Bi 2 S 3