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Rumseyite, [Pb2OF]Cl, the first naturally occurring fluoroxychloride mineral with the parent crystal structure for layered lead oxychlorides

Published online by Cambridge University Press:  05 July 2018

R. W. Turner ,
O. I. Siidra ,
S. V. Krivovichev ,
C. J. Stanley  and
J. Spratt
R. W. Turner*
Affiliation:
The Drey, Allington Track, Allington, Salisbury, Wiltshire SP4 0DD, UK
O. I. Siidra
Affiliation:
Department of Crystallography, Geological Faculty, St Petersburg State University, University Embankment 7/9, St Petersburg 199034, Russia
S. V. Krivovichev
Affiliation:
Department of Crystallography, Geological Faculty, St Petersburg State University, University Embankment 7/9, St Petersburg 199034, Russia
C. J. Stanley
Affiliation:
Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK
J. Spratt
Affiliation:
Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK
*
*E-mail: rturner@imbuia-holdings.com
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Abstract

Rumseyite, ideally [Pb2OF]Cl, is a new mineral species which is associated with calcite, cerussite, diaboleite, hydrocerussite and undifferentiated Mn oxides in a small cavity in 'hydrocerussite' from a manganese pod at Merehead quarry, Somerset, England. Rumseyite is tetragonal, I4/mmm, a = 4.065(1), c = 12.631(7) Å, V = 208.7(1) Å3, Z = 2. The mineral is translucent pale orange-brown with a white streak and vitreous lustre. It is brittle with perfect {100} cleavage; Dcalc = 7.71 g cm–3 (for the ideal formula, [Pb2OF]Cl). The mean refractive index in air at 589 nm is 2.15. The six strongest reflections in the X-ray powder-diffraction pattern [dmeas in Å, (Irel), (hkl)] are as follows: 2.923(100)(013), 2.875(68)(110), 3.848(41)(011), 6.306(17)(002), 1.680(14)(123), 2.110(12)(006). The crystal structure of rumseyite is based on alternating [OFPb2] and Cl layers. Rumseyite is related to other layered Pb oxyhalides. Fluorine and oxygen are statistically disordered over one crystallographic site. Rumseyite is named in honour of Michael Scott (Mike) Rumsey (1980– ), Curator and Collections Manager at the NHM (London), who discovered the mineral. The mineral and name have been approved by the IMA Commission on New Mineral Names and Classification (IMA 2011-091). The holotype specimen is in the collections of the Natural History Museum, London (specimen number BM1970,110).

Keywords

rumseyiteMerehead quarryMendip Hillslayered lead oxychlorideslead oxyhalidesnew mineral species
Type
Research Article
Information
Mineralogical Magazine , Volume 76 , Issue 5 , October 2012 , pp. 1247 - 1255
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2016

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References

Aurivillius, B. (1982) On the crystal structure of a number of non-stoichiometric mixed lead oxide halides composed of PbO like blocks and single halogen layers. Chemica Scripta, 19, 97–107.Google Scholar
Aurivillius, B. (1983) On the crystal structure of some non-stoichiometric mixed lead oxide halides and their relation to the minerals ‘‘lorettoite’’ and sundiusite. Chemica Scripta, 22, 5–11.Google Scholar
Cooper, M.A. 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
Dickinson, R.G. and Friauf, J.B. (1924) The crystal structure of tetragonal lead monoxide. Journal of the American Chemical Society, 46, 2457–2462.CrossRefGoogle Scholar
Gasperin, M. (1964) Sur la synthese d’un oxychlorure de plomb. Bulletin de la Société française de Minéralogie et de Cristallographie, 87, 278–280.CrossRefGoogle Scholar
Gillberg, M. (1960) Perite, a new oxyhalide mineral from Långban, Sweden. Arkiv för Mineralogi och Geologi, 2, 565–570.Google Scholar
Giuseppetti, G. and Tadini, C. (1973) Riesame della struttura cristallina della nadorite: PbSbO2Cl. Periodico di Mineralogia, 42, 335–345.Google Scholar
Kampf, A.R. (1991) Grandreefite, Pb2F2SO4: crystal structure and relationship to the lanthanide oxide sulfates, Ln2O2SO4. American Mineralogist, 76, 278–282.Google Scholar
Krivovichev, S.V. and Filatov, S.K. (1999) Metal arrays in structural units based on anion-centered metal tetrahedra. Acta Crystallographica, B55, 664–676.CrossRefGoogle Scholar
Krivovichev, S.V., Turner, R., Rumsey, M.S., Siidra, O.I. and Kirk, C.A. (2009) The crystal structure and chemistry of mereheadite. Mineralogical Magazine, 73, 103–117.CrossRefGoogle Scholar
Pasero, M. and Vacchiano, D. Crystal structure of mendipite, Pb3O2Cl2. Neues Jahrbuch für Mineralogie, Monatshefte, 2000, 563–569.Google Scholar
Rumsey, M.S. (2008) The first British occurrence of kombatite; Pb14[O9(VO4)2Cl4] from the Wesley Mine near Westbury on Trym, Bristol. Journal of the Russell Society, 11, 51–53.Google Scholar
Rumsey, M.S., Krivovichev, S.V., Siidra, O.I., Kirk, C.A., Stanley, C.J. and Spratt, J. (2011) Rickturnerite, Pb7O4[Mg(OH)4](OH)Cl3, a complex new Pb oxychloride mineral. Mineralogical Magazine, 76, 59–73.Google Scholar
Siidra, O.I. and Krivovichev, S.V. (2008) Crystal chemistry of oxocentered lead oxyhalides and their importance as perspective materials. Pp. 129–141 in: Minerals as Advanced Materials II (S.V. Krivovichev, editor). Springer, Berlin.Google Scholar
Siidra, O.I., Krivovichev, S.V., Filatov, S.K. (2008a) Minerals and synthetic Pb(II) compounds with oxocentered tetrahedra: review and classification. Zeitschrift für Kristallographie, 223, 114–125.CrossRefGoogle Scholar
Siidra, O.I., Krivovichev, S.V., Turner, R.W. and Rumsey, M. S . (2008b ) Chloro xiphite Pb3CuO2(OH)2Cl2 structure refinement and description in terms of oxocentered OPb4 tetrahedra. Mineralogical Magazine, 72, 793–798.CrossRefGoogle Scholar
Siidra, O.I., Krivovichev, S.V., Turner, R.W. and Rumsey, M.S. (2011) Natural and synthetic layered Pb(II) oxyhalides. Pp. 319–332 in: Minerals as Advanced Materials II (S.V. Krivovichev, editor). Springer, Berlin.Google Scholar
Turner, R.W. (2006) A mechanism for the formation of the mineralized manganese deposits at Merehead Quarr y , Cranmor e , Somer s e t , England. Mineralogical Magazine, 70, 629–653.CrossRefGoogle Scholar
Turner, R.W. and Rumsey, M.S. (2010) Mineral relationships in the Mendip Hills. Journal of the Russell Society, 13, 3–47.Google Scholar
Turner, R.W., Siidra, O.I., Rumsey, M.S., Krivovichev, S.V., Stanley, C.S. and Spratt, J. (2012). Hereroite and vladkrivovichevite: two novel lead oxychlorides from the Kombat mine, Namibia. Mineralogical Magazine, 76, 883–890.CrossRefGoogle Scholar
Welch, M.D., Criddle, A.J. and Symes, R.F. (1998) Mereheadite, Pb2O(OH)Cl: a new litharge-related oxychloride from Merehead Quarry, Cranmore, Somerset. Mineralogical Magazine, 62, 387–393.CrossRefGoogle Scholar
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