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Improved powder X-ray data for Cancrinites III: Davyne

Published online by Cambridge University Press:  10 January 2013

Paolo Ballirano ,
Adriana Maras ,
Peter R. Buseck  and
Ann M. Yates
Paolo Ballirano
Affiliation:
Dipartimento di Scienze della Terra, Università degli studi di Pisa, Via S. Maria 53, Pisa, I-56126, ITALY
Adriana Maras
Affiliation:
Dipartimento di Scienze della Terra, Università degli studi di Roma “La Sapienza”, Ple A. Moro 5, Roma, I-00185, ITALY
Peter R. Buseck
Affiliation:
Departments of Geology and Chemistry/Biochemistry, Arizona State University, Tempe, Arizona 85287-1404
Ann M. Yates
Affiliation:
Departments of Geology and Chemistry/Biochemistry, Arizona State University, Tempe, Arizona 85287-1404
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Abstract

New powder X-ray diffraction data of davyne, a member of the cancrinite group of minerals, were collected using a rotating anode diffractometer: the hexagonal cell parameters are a=12.6711(3) Å, c=5.3278(2) Å, volume 740.82(4) Å3 (space group P63). The strongest lines are: 3.658(100), 4.790(73), 3.272(70), 2.112(48), 2.438(22), 2.663(19), 1.781(19), and 4.147(17). The new data provide quantitative intensities improved precision in d-spacings and cover an increased 2θ angular range with respect to PDF 20-379. Measured intensities and a simulated pattern are reported together with crystal-chemical considerations.

Type
Research Article
Information
Powder Diffraction , Volume 12 , Issue 2 , June 1997 , pp. 99 - 102
Copyright
Copyright © Cambridge University Press 1997

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