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Improved powder X-ray data for cancrinites IV: Franzinite

  • Paolo Ballirano (a1) and Adriana Maras (a1)

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.

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a)Author to whom correspondence should be addressed. Electronic mail: paolo.ballirano@uniroma1.it

References

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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, 10031012. amn, AMMIAY
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, 628636. can, CAMIA6
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, 594618. amn, AMMIAY
Cauchois, Y., and Senemaud, C. (1978). International Tables of Selected Constants, Vol. 18: Wavelengths of X-ray Emission Lines and Absorption Edges (Pergamon, Oxford).
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, 892900. acr, JACGAR
Franceschini, F., and Orlandi, P. (1989). “Ritrovamento della franzinite in una perforazione geotermica dei Sabatini (Lazio),” Rend. S.I.M.P. ZZZZZZ 43, 781788.
Garvey, R. G. (1986). “LSUCRIPIC, Least squares unit-cell refinement with indexing on the personal computer,” Powder Diffr. PODIE2 1, 89. pdj, PODIE2
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.
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, 713719.
Merlino, S. (1976). “Framework silicates,” Izvj. Jugoslav. centr. krist. (Zagreb) ZZZZZZ 11, 1937.
Merlino, S., and Mellini, M. (1976). “Crystal structures of cancrinite-like minerals,” Zeolite’76, Program and Abstracts, Tucson, Arizona, p. 47.
Merlino, S., and Orlandi, P. (1977). “Franzinite, a new mineral phase from Pitigliano (Italy),” N. Jb. Miner. Mh.,ZZZZZZ H4, 163167.
Rinaldi, R., and Wenk, H.-R. (1979). “Stacking variations in cancrirnite minerals,” Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. ACACBN 35, 825828. aca, ACACBN
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
de Wolff, P. M. (1968). “A simplified criterion for the reliability of a powder-pattern indexing,” J. Appl. Crystallogr. JACGAR 1, 108. acr, JACGAR
Young, R. A. (1983). “Introduction to the Rietveld method,” in “`The Rietveld Method,” edited by R. A. Young (Oxford Science, Oxford), pp. 1–37.

Improved powder X-ray data for cancrinites IV: Franzinite

  • Paolo Ballirano (a1) and Adriana Maras (a1)

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