Accession Number:

AD0699677

Title:

THE CRYSTAL STRUCTURE OF alpha-Ca2P2O7,

Descriptive Note:

Corporate Author:

MCMASTER UNIV HAMILTON (ONTARIO)

Personal Author(s):

Report Date:

1967-12-06

Pagination or Media Count:

7.0

Abstract:

The high-temperature form of calcium pyrophosphate, alpha-Ca2P2O7, crystallizes in the monoclinic space group P21n. The structure is closely related to that of alpha-Sr2P2O7, although the latter has orthorhombic symmetry. Both cations show coordination numbers of eight with average cation-oxygen atom bond lengths of 2.54 and 2.51 A for the individual cation sites. The structure was refined by a full-matrix least-squares procedure using 1416 reflections whose intensities were estimated visually. The final value for the conventional R value is 0.098. The diffraction pattern shows a marked orthorhombic character suggesting a high-temperature phase with Pbnm symmetry. Author

Subject Categories:

  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE