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 hydrated ammonium hemizinc dihydrogen diphosphate (NH 4 ) 2 Zn(H 2 P 2 O 7 ) 2  · 2 H 2 O was synthesized. It crystallizes in the triclinic system, space group  P -1,  Z  = 1, with the following unit-cell-parameters:  a  = 7.0026(2) Å,  b  = 7.3297(2) Å,  c  = 7.7885(3) Å,  α  = 81.229(1)°,  β  = 71.064(1)°,  γ  = 88.172(1)°,  V  = 373.64(2) Å 3 . The structure was obtained by single-crystal X-ray diffractometry, and a full-matrix least-squares refinement based on  F  2  gave a final  R  1  index of = 0.0447 ( wR  2  = 0.1336), utilizing 2055 observed reflections with  I  &gt; 2 σ ( I ). The crystal packing consists in a three-dimensional network made by layers parallel to  ab  plane of ZnO 6  octahedra sharing four vertices with H 2 P 2 O 7  double tetrahedra: (NH 4 ) +  cations fill up the cavities between tetrahedra and octahedra; strong hydrogen bonds stabilize the framework. The dihydrogendiphosphate anion (H 2 P 2 O 7 ) 2-  shows bent eclipsed conformation and the Zn 2+  ion lies on inversion centre. Raman and infrared spectra of (NH 4 ) 2 Zn(H 2 P 2 O 7 ) 2  · 2 H 2 O have been collected and interpreted using factor group analysis. No coincidences observed between most of Raman and IR spectral bands confirmed the centrosymmetric structure of the title compound; the vibrational spectra point to a bent POP bridge angle.

Crystal structure and vibrational spectroscopy of the new acidic diphosphate (NH 4 ) 2 Zn(H 2 P 2 O 7 ) 2 · 2 H 2 O