Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-29T07:27:13.888Z Has data issue: false hasContentIssue false
  • English
  • Français

First Italian occurrence of cumengéite from Vesuvius: crystal-structure refinement and revision of the chemical formula

Published online by Cambridge University Press:  05 July 2018

G. Cruciani ,
P. Orlandi ,
M. Pasero  and
M. Russo
G. Cruciani
Affiliation:
Dipartimento di Scienze della Terra, Università di Ferrara, Corso Ercole I d'Este 32, I-44100 Ferrara, Italy
P. Orlandi
Affiliation:
Dipartimento di Scienze della Terra, Università di Pisa and CNR-IGG, Via S. Maria 53, I-56126 Pisa, Italy
M. Pasero*
Affiliation:
Dipartimento di Scienze della Terra, Università di Pisa and CNR-IGG, Via S. Maria 53, I-56126 Pisa, Italy
M. Russo
Affiliation:
Osservatorio Vesuviano, INGV, Via Diocleziano, 328, I-80124 Napoli, Italy
*
*E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

The first Italian occurrence of cumengéite, a rare Pb and Cu hydroxychloride, is described from Vesuvius (Italy). Italian cumengéite has a volcanic origin (it occurs in the fumarole), which is unique for that mineral. The mineralogy of Vesuvius' fumarole is outlined briefly. A powder X-ray diffraction (XRD) pattern of cumengéite is presented. The crystal structure of cumengéite has been refined (R = 0.036) using single-crystal XRD data. Cumengéite is tetragonal, space group I4/mmm, a 15.1007(2), c 24.4940(4) Å. In the structure of cumengéite there are five independent Pb atoms, which are linked to 6—9 anions in five different ways. The structural study revealed the presence of two independent and previously unobserved water molecules, and led to the revision of the accepted chemical formula for the mineral: the new formula is Cu20Pb21Cl42(OH)40·6H2O. Analytical data taken from the literature for cumengéite from Boléo, Mexico (the type locality), as well as a new structural study carried out on the type material confirmed the new formula.

Keywords

cumengéiteVesuviusItalycrystal structurecrystal-chemical formula
Type
Research Article
Information
Mineralogical Magazine , Volume 69 , Issue 6 , December 2005 , pp. 1037 - 1045
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Arnò, V., Principe, C., Rosi, M., Santacroce, R., Sbrana, A. and Sheridan, M.F. (1987) Eruptive history. Pp. 53—103 in: Somma-Vesuvius (Santacroce, R., editor). Quaderni de La Ricerca Scientifica, CNR, Roma, 114–8.Google Scholar
Bariand, P., Boulliard, J.C., Chancelier-Dumielle, I. and Tournis, V. (1998) Famous mineral localities: Boléo, Baja California, Mexico. Mineralogical Record, 29, 5–49.Google Scholar
Bonotti, F. (2000) Catalogo illustrato delle specie mineralogiche nelle scorie metallurgiche toscane. [http://www.comune.pisa.it/apsn/Articoli/Scorie/Chklstscorie.htm]Google Scholar
Brese, N.E. and O'Keeffe, M. (1991) Bond-valence parameters for solids. Acta Crystallographica, B47, 192–197.CrossRefGoogle Scholar
Chiodini, G., Marini, L. and Russo, M. (2001) Geochemical evidence for the existence of high-temperature hydrothermal brines at Vesuvio volcano, Italy. Geochimica et Cosmochimica Acta, 65, 2129–2147.CrossRefGoogle Scholar
Dean, A.C. (1982) First British occurrence of cumengeite. Journal of the Russell Society, 1, 40–41.Google Scholar
Dean, A.C., Symes, R.F., Thomas, J.H. and Williams, P.A. (1983) Cumengéite from Cornwall. Mineralogical Magazine, 47, 235—236.CrossRefGoogle Scholar
Dossett, I. and Green, D.I. (1988) Atacamite, botallackite and cumengeite from Abersoch, Gwynedd, Wales. Journal of the Russell Society, 7, 37–38.Google Scholar
Friedel, C. (1906) Contribution a l'étude de la boléite et de ses congénères. Bulletin de la Société Française de Minéralogie, 29, 14—55.CrossRefGoogle Scholar
Gossner, B. and Arm, M. (1929) Chemische and rontgenographische Untersuchungen an Stoffen und Kristallen von komplexer Bauart. Zeitschrift für Kristallographie, 72, 202–236.Google Scholar
Hawthorne, F.C. and Groat, L.A. (1986) The crystal structure and chemical composition of cumengéite. Mineralogical Magazine, 50, 157—162.CrossRefGoogle Scholar
Hocart, R. (1930) Sur la détermination des paramèters de la boléite, de la pseudoboléite et de la cumengéite au moyen des rayons x. Zeitschrift für Kristallographie, 74, 20–24.Google Scholar
Kohlberger, W. (1976) Minerals of the Laurium mines, Attica, Greece. Mineralogical Record, 7, 114—125.Google Scholar
Krivovichev, S.V. and Brown, I.D. (2001) Are the compressive effects of encapsulation an artifact of bond-valence parameters. Zeitschrift für Kristallographie, 216, 245–247.Google Scholar
Mallard, E. (1893) Sur la boléite, la cumengéite et la percylite.. Bulletin de la Société Française de Minéralogie, 16, 184–195.Google Scholar
Mallard, E. and Cumengé, E. (1891a) Sur une nouvelle espèce minérale, la boléite. Comptes Rendus, 113, 519–524.Google Scholar
Mallard, E. and Cumengé, E. (1891b) Sur une nouvelle espèce minérale, la boléite. Bulletin de la Société Française de Minéralogie, 14, 283—293.Google Scholar
Mücke, A. (1969) Röntgenographische Untersuchung von Blei-Kupfer Oxi dchloriden. Naturwissenschaften, 56, 34—35.CrossRefGoogle Scholar
Nickel, E.H. and Gartrell, B.J. (1993) Secondary minerals from Ashburton Downs, Western Australia. Mineralogical Record, 24, 203–218.Google Scholar
Otwinowsky, Z. and Minor, W. (1997) Processing of X-ray diffraction data collected in oscillation mode. Methods in Enzymology, 276A, 307–326.CrossRefGoogle Scholar
Palenzona, A., Bulgarelli, G., Ciriotti, M. and Selmi, P. (1998) Val Varenna (GE). Aggiornamento sui minerali delle scorie. Rivista Mineralogica Italiana, 11, 39–41.Google Scholar
Parascandola, A. (1951) I minerali del Vesuvio nella eruzione del marzo 1944 e quelli formati durante l'attuale periodo di riposo. Bollettino delta Società Geologica d'Italia, 70, 523–526.Google Scholar
Parascandola, A. (1959) Notizie vesuviane. II Vesuvio dal marzo 1948 al dicembre 1959. Bollettino della Società dei Naturalisti, Napoli, 68, 184 pp.Google Scholar
Russo, M. (1995) Sorveglianza geochimica aH'Osservatorio Vesuviano nel 1994: Campi Flegrei e Vesuvio. Pp. 6–8 in: Giornate Poster sulle Ricerche del Gruppo Geomineralogico. Atti V Conferenza Scientifica Annuale sulle attività di ricerca dei Dipartimenti, Napoli, 235–236.Google Scholar
Russo, M. (1997) Nuovi ritrovamenti di minerali al Vesuvio: halotrichite e pikeringite. GMGN Notizie del Gruppo Mineralogico Geologico Napoletano, 2, 11. [http://www.geocities.com/gmgn/nl97-3.htm]Google Scholar
Russo, M. (1998) Primo ritrovamento di barite al Vesuvio. GMGN Notizie del Gruppo Mineralogico Geologico Napoletano, 3, 4. http://www.geocities.-com/gmgn/n3_98-4.htmGoogle Scholar
Russo, M. (2003) Elenco delle specie minerali del Somma-Vesuvio (aggiornato al 2002). http://www.dinet.it/Mineral-GMC/AMI/vesuvio.htmlGoogle Scholar
Russo, M. and Langella, A. (1996) Ricerche in corso sui minerali presenti alle fumarole del Vesuvio. Conferenza Scientifica Annuale GNV-CNR e Osservatorio Vesuviano, Napoli, Abstract volume.Google Scholar
Sheldrick, G.M. (1993) SHELXL-93. Program for the refinement of crystal structures. University of Gottingen, Germany.Google Scholar
Winchell, R.E. and Rouse, R.C. (1974) The mineralogy of the boleite group. Mineralogical Record, 5, 280–287.Google Scholar