Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Crystal structure of decacalcium tetrapotassium hexakis (pyrophosphate) nonahydrate

  • 46 Accesses

  • 2 Citations

Abstract

The crystal structure of Ca10K4(P2O7)6·9H2O has been determined by single crystal X-ray diffraction. Crystals are hexagonal, space group P63cm witha=11.761(1),c=9.770(1) Å, andZ=1. The structure was refined toR=0.028 andR w=0.037 for 468 reflections withI≥3σ(I). The structure consists of a compact assembly of Ca and P2O7 ions arranged in layers perpendicular to thec-axis in a hexagonal array with relatively large open channels along thec-axis. The K ions and the water molecules are located in these open channels and are disordered.

This is a preview of subscription content, log in to check access.

References

  1. 1.

    Brown, E.H.; Lehr, J.R.; Smith, J.P.; Frazier, A.W.J. Agric. Food Chem. 1963,11, 214.

  2. 2.

    Mathew, M.; Schroeder, L.W.Acta Crystallogr. 1977,B33, 3025.

  3. 3.

    Takagi, S.; Mathew, M.; Brown, W.E.Acta Crystallogr. 1980,B36, 2526.

  4. 4.

    Mathew, M.; Schroeder, L.W.; Brown, W.E.J. Crystallogr. Spectrosc. Res. 1993,23, 657.

  5. 5.

    Takagi, S.; Mathew, M.; Brown, W.E.Acta Crystallogr. 1982,B38, 44.

  6. 6.

    Johnson, C.K.Ortep. Report ORNL-3794; Oak Ridge National Laboratory: TN; 1965.

  7. 7.

    Mandel, N.Acta Crystallogr. 1975,B31, 1730.

  8. 8.

    Davis, N.L.; Mandel, G.S.; Mandel, N.S.; Dickerson, R.E.J Crystallogr. Spectrosc. Res. 1985,15, 513.

  9. 9.

    Schroeder, L.W.; Bowen, R.L.; Ferris, J.S.J. Biomed. Res. 1980,14, 83.

Download references

Author information

Correspondence to M. Mathew.

Additional information

Certain commercial materials and equipments are identified in this paper to specify the experimental procedure. In no instance does such identification imply recommendation or endorsement by the National Institute of Standards and Technology or the ADA Health Foundation or that the material or equipment identified is necessarily the best available for the purpose.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Mathew, M., Ammon, H.L. Crystal structure of decacalcium tetrapotassium hexakis (pyrophosphate) nonahydrate. J Chem Crystallogr 25, 219–222 (1995). https://doi.org/10.1007/BF01665172

Download citation

Key Words

  • Calcium phosphate
  • calcium pyrophosphate
  • calcium potassium pyrophosphate
  • crystal structure
  • layer-type structure