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

Published online by Cambridge University Press:  10 January 2013

Umberto Costa  and
Paolo Ballirano
Umberto Costa
Affiliation:
C.T.G. S.p.A. Italcementi Group, Via G. Camozzi 124, Bergamo, 1-24121, Italy
Paolo Ballirano*
Affiliation:
C.T.G. S.p.A. Italcementi Group, Via G. Camozzi 124, Bergamo, 1-24121, Italy
*
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: [email protected]
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Abstract

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.

Keywords

Ca12Al14O32F2, C11A7fcement phaseRietveld refinementpowder diffraction
Type
New Diffraction Data
Information
Powder Diffraction , Volume 15 , Issue 1 , March 2000 , pp. 56 - 61
Copyright
Copyright © Cambridge University Press 2000

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