Acta Crystallographica Section C Crystal Structure Communications · 1993 · 81 citations · 0 references
Natural SciencesChemistryCrystal StructureInorganic ChemistryPhysical ChemistryAb Initio MethodsCoordination ChemistryCrystal ChemistryCrystal SystemsCrystallographyStructure DeterminationBeta-tricalcium PhosphateBonding GeometryCrystal Chemistry Of PhosphatesDicalcium PhosphateTricalcium Phosphate
β Dicalcium diphosphate is composed of eclipsed P 2 O 7 groups linked through Ca 2+ cations. The P-Ob bonds involving the bridging O atoms arelonger [average 1.620 (5) A] than the others [average 1.517 (5) A]. As the «O 4 » tetrahedra are almost regular the displacement of the P atoms involves two sets of O-P-O angles: O-P-O≃112.7 (2) and O-P-O b ≃106.0 (2) o