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Crystal structure refinement of sahlinite Pb14(AsO4)2O9Cl4

Published online by Cambridge University Press:  05 July 2018

E. Bonaccorsi  and
M. Pasero
E. Bonaccorsi
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
*
* E-mail: [email protected]
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Abstract

The crystal structure of sahlinite [Pb14(AsO4)2O9Cl4] from Lågban (Sweden) has been refined up to R = 0.071 using single-crystal diffraction data collected at the Elettra synchrotron facility. Sahlinite is monoclinic, space group C2/c, with a = 12.704(4), b = 22.576(5), c = 11.287(4) Å, β = 118.37(3)°. Sahlinite is isostructural with kombatite, its vanadium counterpart. Both are derivatives of the litharge form of PbO. In the structure of sahlinite there are seven independent Pb atoms, which are linked to Cl and/or O atoms, with coordination number ranging from V to VIII. The coordination polyhedra are irregularly shaped, due to the 6s2 lone-pair effect displayed by Pb2+.

Keywords

sahlinitecrystal structuresynchrotron datalone-pair effectLångban (Sweden).
Type
Research Article
Information
Mineralogical Magazine , Volume 67 , Issue 1 , February 2003 , pp. 15 - 21
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2003

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References

Adams, D.M., Christy, A.G., Haines, J. and Clark, S.M. (1992) Second-order phase transition in PbO and SnO at high pressure: implications for the litharge-masicot phase transformation. Physics Review, B46, 11358—11367.CrossRefGoogle ScholarPubMed
Aminoff, G. (1934) Note on a new mineral from Långban (sahlinite). Geologiska Föreningens i Stockholm Föhrhandlingar, 56, 493—494.CrossRefGoogle Scholar
Blessing, R.H. (1995) An empirical correction for absorption anisotropy. Acta Crystallographica, A51, 33—38.CrossRefGoogle ScholarPubMed
Brese, N.E. and O’Keeffe, M. (1991) Bond-valence parameters for solids. Acta Crystallographica, B47, 192—197.CrossRefGoogle Scholar
Cooper, M. and Hawthorne, F.C. (1994) The crystal structure of kombatite, Pb14(VO4)2O9Cl4, a complex heteropolyhedral sheet mineral. American Mineralogist, 79, 550—554.Google Scholar
Dunn, P.J. (1991) Rare minerals of the Kombat Mine, Namibia. Mineralogical Record, 22, 421—426.Google Scholar
Dunn, P.J. and Rouse, R.C. (1985) The structure of thorikosite, a naturally occurring member of the bismuth oxyhalide group. Journal of Solid State Chemistry , 57, 389—395.Google Scholar
Farrugia, L.J. (1999) WinGX suite for small-molecule single-crystal crystallography. Journal of Applied Crystallography, 32, 837—838.CrossRefGoogle Scholar
Garnier, P., Moreau, J. and Gavarri, J.R. (1990) Rietveld analysis of the structure of lead titanium oxide (Pb1-xTixO1+x). Materials Research Bulletin, 25, 979—986.CrossRefGoogle Scholar
Holtstam, D. and Langhof, J. (1999) Långban: the Mines, their Minerals, Geology and Explorers. Raster Förlag and Swedish Museum of Natural History, Stockholm, 215 pp.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
Leciejewicz, J. (1961) On the crystal structure of tetragonal (red) PbO. Acta Crystallographica , 14, 1304.CrossRefGoogle Scholar
Medenbach, O., Gebert, W. and Abraham, K. (1983) Gebhardit, Pb8OCl6(As2O2)2, ein neues Arsenit von Tsumeb, Südwest-Afrika/Namibia. Neues Jahrbuch für Mineralogie Monatshefte, 445—450.Google Scholar
Moore, P.B. (1970) Mineralogy & chemistry of Långban-type deposits in Bergslagen, Sweden. Mineralogical Record, 1, 154—172.Google Scholar
Otwinowsky, Z. and Minor, W. (1992) Processing of X-ray diffraction data collected in oscillation mode. Methods in Enzymology, 276A, 307—326.CrossRefGoogle Scholar
Pasero, M. and Vacchiano, D. (2000) Crystal structure and revision of the chemical formula of georgiade-site, Pb4(AsO3)Cl4(OH). Mineralogical Record, 64, 879—884.CrossRefGoogle Scholar
Rouse, R.C. and Dunn, P.J. (1985) A re-examination of sahlinite from Långban, Sweden. Neues Jahrbuch für Mineralogie Monatshefte, 127—131.Google Scholar
Rouse, R.C., Dunn, P.J. and Innes, J. (1986) Kombatite, the vanadium analogue of sahlinite, from the Kombat mine, South West Africa. Neues Jahrbuch für Mineralogie Monatshefte, 519—522.Google Scholar
Shannon, R.D. (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallographica , A32, 751—767.CrossRefGoogle Scholar
Sheldrick, G.M. (1993) SHELXL-93. Program for the refinement of crystal structures. University of Gottingen, Germany.Google Scholar
Welin, E. (1968) Notes on the mineralogy of Sweden. 6. X-ray powder data for minerals from Långban and the related mineral deposits of Central Sweden. Arkiv for Mineralogi och Geologi, 4, 499—541.Google Scholar