CRYSTAL-STRUCTURE OF SILICON PYROPHOSPHATE (FORM-I) FROM POWDER DIFFRACTION DATA Academic Article uri icon

abstract

  • The crystal structure of silicon pyrophosphate (Form I) was solved from X-ray powder data and refined by the Rietveld method. The crystals belong to the hexagonal space group P63 with a = 4.7158(3) and c = 11.917(1) . There are two SiP2O7 traits in the unit cell. Both the P atoms and the Si atom are located on threefold axes. The silicon atoms are situated in the ab plane at z = 0 and 1/2. One of the P atoms of the pyrophosphate group is located slightly above the plane at z = 0 while the other is slightly below the plane at z = 1/2. Thus, the structure resembles the layer structure of -zirconium phosphate. The layers in the present case, however, are held together by the P-O-P bonds. The relationship between this structure and those of the other pyrophosphates and the layered M(HPO4)2 phases is discussed. 1994 Academic Press, Inc.

published proceedings

  • JOURNAL OF SOLID STATE CHEMISTRY

altmetric score

  • 3

author list (cited authors)

  • POOJARY, D. M., BORADE, R. B., CAMPBELL, F. L., & CLEARFIELD, A.

citation count

  • 50

complete list of authors

  • POOJARY, DM||BORADE, RB||CAMPBELL, FL||CLEARFIELD, A

publication date

  • September 1994