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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: [email protected]
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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.

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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References

Ballirano, P., Maras, A., and Buseck, P. R. (1996). “Crystal chemistry and IR spectroscopy of CI and SO4-bearing cancrinite-like minerals,” Am. Mineral. AMMIAY 81, 1003–1012. amn, AMMIAY CrossRefGoogle Scholar
Ballirano, P., Merlino, S., Bonaccorsi, E., and Maras, A. (2000). “The crystal structure of franzinite, the ten-layer mineral of the cancrinite group,” Can. Mineral. CAMIA6 38, 628–636. can, CAMIA6 CrossRefGoogle Scholar
Cameron, M., Sueno, S., Prewitt, C. T., and Papike, J. J. (1993). “High-temperature crystal chemistry of acmite, diopside, hedembergite, jadeite, spoduhene, and ureyite,” Am. Mineral. AMMIAY 58, 594–618. amn, AMMIAY Google Scholar
Cauchois, Y., and Senemaud, C. (1978). International Tables of Selected Constants, Vol. 18: Wavelengths of X-ray Emission Lines and Absorption Edges (Pergamon, Oxford).Google Scholar
Finger, L. W., Cox, D. E., and Jephcoat, A. P. (1994). “A correction for powder diffraction peak asymmetry due to axial divergence,” J. Appl. Crystallogr. JACGAR 27, 892–900. acr, JACGAR CrossRefGoogle Scholar
Franceschini, F., and Orlandi, P. (1989). “Ritrovamento della franzinite in una perforazione geotermica dei Sabatini (Lazio),” Rend. S.I.M.P. ZZZZZZ 43, 781–788.Google Scholar
Garvey, R. G. (1986). “LSUCRIPIC, Least squares unit-cell refinement with indexing on the personal computer,” Powder Diffr. PODIE2 1, 89. pdj, PODIE2 Google Scholar
Larson, A. C., and Von Dreele, R. B. (1985). “GSAS: General Structure Analysis System,” LAUR 86-748, Los Alamos National Laboratory, Copyright, 1985–1994, The Regent of the University of California.Google Scholar
Leoni, L., Mellini, M., Merlino, O., and Orlandi, P. (1979). “Cancrinite-like minerals: New data and crystal chemical considerations,” Rend. S.I.M.P. ZZZZZZ 35, 713–719.Google Scholar
Merlino, S. (1976). “Framework silicates,” Izvj. Jugoslav. centr. krist. (Zagreb) ZZZZZZ 11, 19–37.Google Scholar
Merlino, S., and Mellini, M. (1976). “Crystal structures of cancrinite-like minerals,” Zeolite’76, Program and Abstracts, Tucson, Arizona, p. 47.Google Scholar
Merlino, S., and Orlandi, P. (1977). “Franzinite, a new mineral phase from Pitigliano (Italy),” N. Jb. Miner. Mh.,ZZZZZZ H4, 163–167.Google Scholar
Rinaldi, R., and Wenk, H.-R. (1979). “Stacking variations in cancrirnite minerals,” Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. ACACBN 35, 825–828. aca, ACACBN CrossRefGoogle Scholar
Smith, G. S., and Snyder, R. L. (1979). “FN: A criterion for rating powder diffraction patterns and evaluating the reliability of powder-pattern indexing,” J. Appl. Crystallogr. JACGAR 12, 60. acr, JACGAR CrossRefGoogle Scholar
de Wolff, P. M. (1968). “A simplified criterion for the reliability of a powder-pattern indexing,” J. Appl. Crystallogr. JACGAR 1, 108. acr, JACGAR CrossRefGoogle Scholar
Young, R. A. (1983). “Introduction to the Rietveld method,” in “`The Rietveld Method,” edited by R. A. Young (Oxford Science, Oxford), pp. 1–37.Google Scholar