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

Crystals of KCu 3 (OH) 2 [(AsO 4 )H(AsO 4 )] were synthesized under hydrothermal conditions at ∼ 500 K. The crystal structure was solved from 1386 single crystal X-ray data:  a  = 10.292(5) Å,  b  = 5.983(3) Å,  c  = 7.877(4) Å,  β  = 117.86(2)°, space group  C 2/ m ,  Z  = 2,  R  = 0.033. One of the two crystallographically different copper coordination polyhedra is a “compressed octahedron” with two “short” (axial) and four “medium” (equatorial) Cu – O bonds [1.899(2) Å, 2× and 2.186(1) Å, 4×]. The other Cu atom as usual is [4 + 2] coordinated [Cu – O = 1.934(1) Å, 2×, 2.000(1) Å, 2×, and 2.428(2) Å, 2×]. Each two arsenate tetrahedra are connected to dimers by a symmetry restricted hydrogen bond of 2.490(6) Å. The structure type of KCu 3 (OH) 2 [(AsO 4 )H(AsO 4 )] is strongly related with that of NaCu 2 (H 3 O 2 )(SO 4 ) 2  (natrochalcite) and Cu 2 O(SO 4 ) (dolerophanite).

zeitschrift für kristallographie

An uncommon Cu [2+4] O 6  coordination polyhedron in the crystal structure of KCu 3 (OH) 2 [(AsO 4 )H(AsO 4 )] (with a comparison to related structure types)