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Improved powder X-ray data for cancrinites IV: Franzinite

Published online by Cambridge University Press:  05 March 2012

Paolo Ballirano  and
Adriana Maras
Paolo Ballirano*
Affiliation:
Dipartimento di Scienze della Terra, Universita` degli studi di Roma “La Sapienza,” P. le Aldo Moro, 5, Roma, I-00185, Italy
Adriana Maras
Affiliation:
Dipartimento di Scienze della Terra, Universita` degli studi di Roma “La Sapienza,” P. le Aldo Moro, 5, Roma, I-00185, Italy
*
a)Author to whom correspondence should be addressed. Electronic mail: paolo.ballirano@uniroma1.it
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Abstract

Improved powder X-ray diffraction (XRD) data for franzinite, the ten-layer member of the cancrinite group of minerals, were obtained using an automated parallel-beam powder diffractometer with a capillary mount. The cell parameters of franzinite were found to be a=12.8976(3) Å, c=26.5040(8) Å, V=3818.2(2) Å3 in space group P321, while the strongest reflections were at 3.725(100), 3.809(65), 3.562(56), 3.586(55), 2.662(42), 2.150(31) and 3.302(30) Å. The new results include an increased number of indexed peaks, improved figures-of-merit with respect to PDF 30-1170 and intensities validated by Rietveld refinement.

Information

Type
New Diffraction Data
Information
Powder Diffraction , Volume 16 , Issue 4 , December 2001 , pp. 216 - 219
Copyright
Copyright © Cambridge University Press 2001

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