Investigation of mixed alkaline earth phosphates. Synthesis and crystal structure of CaBa(HPO4)2: A new mixed alkaline earth hydrogenmonophosphate

Synthesis, crystal structure, and vibrational study of K2Cu(HPO4)2·6H2O: A new metal hydrogenphosphate compound

“…These spectral characteristics were previously observed in a variety of strong hydrogen bonded solids having O … O distances varying from 2.45 to 2.70 Å, including Ca Ba (HPO 4 ) 2 [23], N(CH 3 ) 4 H 2 PO 4 $ H 2 O [24], and NaH 2 PO 4 [25]. In the present case, these bands (see Figs.…”

Investigation of the Alkaline Earth Phosphates: Synthesis and Crystal Structure of a New Strontium Hydrogen Phosphate Form

“…As suggested by Figs. 2a and 2b, the atomic arrangement of the title compound shows close similarity to that observed in CaBa(HPO ) salt (13). Indeed, in the related compound, we note the same succession of two types of HPO\ , sheets which alternate with Ba>/Ca> planes and an H-bonding system similar, where closed dimers are present along with in"nite chains.…”

“…The 2800}1700 cm\ range corresponds to the OH modes of HPO\ groups characterized by three broad bands of ABC type. Similar bands have been observed in strong hydrogen bonded crystals, such as CaBa(HPO ) (13) and PbHPO (14). The presence of bands in the region 1400}1200 cm\ is characteristic of hydrogen monophosphate groups (12).…”

“…-SrHPO , like the related CaBa(HPO ) (13), has an interesting three-dimensional network consisting of phosphate sheets linked via the alkaline earth cations. Further interaction linkages are provided by strong hydrogen bonds which features are de"ned by the H/PO\ ratio as has been found in some hydrogen sulfate structures (22).…”

Investigation of Mixed Divalent Cation Monophosphates: Synthesis, Crystal Structure, and Vibrational Study of CdBa2(HPO4)2(H2PO4)2

“…In previous papers we have reported the preparation and the characterization (X-ray structure, IR spectroscopy, etc.) of the H-bonded crystals: CaBa (HPO ) (H PO ) (CaBa ) (5), CdBa (HPO )(P O ) (6), and CaBa(HPO ) (7). The latter, like -SrHPO has H-bonded HPO\ entities, where closed dimers are present along with in"nite zigzag chains.…”