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Asbecasite: crystal structure refinement and crystal chemistry

Published online by Cambridge University Press:  05 July 2018

Michele Sacerdoti ,
Gian Carlo Parodi ,
Annibale Mottana ,
Adriana Maras  and
Giancarlo Della Ventura
Michele Sacerdoti
Affiliation:
Istituto di Mineralogia, Università di Ferrara, Corso Ercole I d'Este 32, 1-44100 Ferrara, Italy
Gian Carlo Parodi
Affiliation:
Museum National d'Histoire Naturelle, Laboratoire de Minéralogie, 61 rue de Buffon, F-75005 Paris, France
Annibale Mottana
Affiliation:
Dipartimento di Scienze della Terra, Sezione Mineralogico-Cristallografica, Università 'La Sapienza', Piazzale A. Moro 5, 1-00185 Roma, Italy
Adriana Maras
Affiliation:
Dipartimento di Scienze della Terra, Sezione Mineralogico-Cristallografica, Università 'La Sapienza', Piazzale A. Moro 5, 1-00185 Roma, Italy
Giancarlo Della Ventura
Affiliation:
Dipartimento di Scienze della Terra, Sezione Mineralogico-Cristallografica, Università 'La Sapienza', Piazzale A. Moro 5, 1-00185 Roma, Italy
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Abstract

The crystal structure of antimonian asbecasite in an ejectum of hypabyssal origin occurring at Tre Croci near Vetralla, Vico volcanic complex, Roman potassic province, Latium, Italy, has been refined to R = 0.042, and is compared to the original crystal structure determination carried out on the Sb-free asbecasite of hydrothermal metamorphic origin from the type-locality, Cherbandung in Binna valley, Monte Leone nappe, Switzerland. New electron microprobe analyses of samples from both localities demonstrate crystal-chemical features that permit distinction between asbecasites from the two occurrences, so far the only known localities for this mineral.

Keywords

asbecasitecrystal structurecrystal chemistrySwitzerlandItaly
Type
Crystal Structure
Information
Mineralogical Magazine , Volume 57 , Issue 387 , June 1993 , pp. 315 - 322
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1993

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Footnotes

*

Present address: Dipartimento di Scienze della Terra, Museo di Mineralogia, Università 'La Sapienza', Piazzale A. Moro 5, 1-00185 Roma, Italy.

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