Ammonium zinc phosphate, (NH 4 )Zn(HPO 4 )(H 2 PO 4 ), is built up from in®nite 4-ring chains of vertex-sharing ZnO 4 and (H/ H 2 )PO 4 tetrahedra [d av (ZnÐO) = 1.943 (2) A Ê and d av (PÐO) = 1.534 (2) A Ê ] crosslinked by ammonium cations. The intrachain OÐHÁ Á ÁO hydrogen bond appears to be essen
(NH4)7(HPO4)2(PO4), heptaammonium bis(hydrogenphosphate) phosphate
✍ Scribed by Nolte, Matthias ;Pantenburg, Ingo ;Meyer, Gerd
- Publisher
- International Union of Crystallography
- Year
- 2005
- Tongue
- English
- Weight
- 153 KB
- Volume
- 61
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
The asymmetric unit of the compound (NH 4 ) 7 (HPO 4 ) 2 (PO 4 ) consists of two hydrogen phosphate anions, one phosphate anion and seven ammonium cations, all of them located in general positions. The two [PO 3 (OH)] 2À anions are linked to the PO 4 3À anion via an O-HÁ Á ÁO hydrogen bond to form a three-anion unit, which is surrounded by the ammonium cations. The anions and cations are further connected via N-HÁ Á ÁO hydrogen bonding.
📜 SIMILAR VOLUMES
A new three-dimensional gallium phosphate, [NH 3 (CH 2 ) 4 NH ][Ga 4 (HPO 4 )(PO 4 ) 4 ], has been synthesized under solvothermal conditions at 433 K in the presence of 1,4-diaminobutane and its structure determined using room-temperature single-crystal X-ray diffraction data (M r ؍ 844.91, monocl