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Improved powder X-ray data for the cement phase Ca12Al14O32F2 (C11A7f)

  • Umberto Costa (a1) and Paolo Ballirano (a1)


New powder X-ray diffraction data of Ca12Al14O32F2 (C11A7f), a cementitious compound, were collected on a conventional X-ray powder diffractometer; the cubic cell parameter is a=11.96269(6) Å, volume 1711.93(2) Å3 (space group I-43d (No. 220)). The strongest lines are 4.887(100), 2.676(95), 2.992(46), 2.443(46), 2.185(37), 3.198(32), 1.599(26), and 1.941(25). Reported intensities are validated by Rietveld analysis. The new data consist of measured intensities and cover a wider 2θ angular range with respect to the calculated PDF 25-394 and the indexed PDF 36-678: experimental, calculated, and difference patterns are reported together with crystal-chemical considerations.


Corresponding author

a)Author to whom all correspondence should be addressed. Present address: Dipartimento di Scienze della Terra, Universita di Roma I “La Sapienza” P. le A. Moro 5, I-00185, Roma, Italy. Electronic mail:


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Improved powder X-ray data for the cement phase Ca12Al14O32F2 (C11A7f)

  • Umberto Costa (a1) and Paolo Ballirano (a1)


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