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Yeomanite, Pb2O(OH)Cl, a new chain-structured Pb oxychloride from Merehead Quarry, Somerset, England

Published online by Cambridge University Press:  02 January 2018

R. W. Turner ,
O. I. Siidra ,
M. S. Rumsey ,
Y. S. Polekhovsky ,
Y. L. Kretser ,
S. V. Krivovichev ,
J. Spratt  and
C. J. Stanley
R. W. Turner*
Affiliation:
The Drey, Allington Track, Allington, Salisbury SP4 0DD, Wiltshire, UK
O. I. Siidra
Affiliation:
Department of Crystallography, Geological Faculty, St Petersburg State University, University Embankment 7/9, St Petersburg 199034, Russia
M. S. Rumsey
Affiliation:
Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK
Y. S. Polekhovsky
Affiliation:
Department of Mineral Deposits, St Petersburg State University, University Embankment 7/9, 199034 St Petersburg, Russia
Y. L. Kretser
Affiliation:
V. G. Khlopin Radium Institute, Roentgen Street 1, 197101 St Petersburg, Russia
S. V. Krivovichev
Affiliation:
Department of Crystallography, Geological Faculty, St Petersburg State University, University Embankment 7/9, St Petersburg 199034, Russia
J. Spratt
Affiliation:
Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK
C. J. Stanley
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

Yeomanite, Pb2O(OH)Cl, is a new Pb-oxychloride found in the manganese pod mineral assemblage at Merehead (Torr Works) Quarry, near Cranmore, Somerset, England. Yeomanite is named in joint recognition of Mrs Angela Yeoman (1931–) and her company, Foster Yeoman, who operated Merehead Quarry for aggregate until 2006. The mineral is normally white, occasionally grey, with a white streak and a vitreous to transparent lustre. Invariably intimately associated with mendipite, yeomanite appears to be formed of small, twisted, rope-like fibres growing from the end of columnar mendipite masses, forming loose mats and strands resembling asbestos. Individual fibres are generally <8 mm long, but exceptionally may reach up to 15 mm. There is a perfect cleavage parallel to the long axis of the fibres but this is masked by the fibrous nature, especially as individual fibres break easily. The Dcalc for the ideal formula is 7.303 g/cm3. The mean RI in air at 589 nm is 2.27. The eight strongest reflections in the powder X-ray diffraction pattern [(d in Å) (Intensity) (hkl)] are: 2.880(100)(113); 2.802(78)(006); 3.293(61)(200); 3.770(32)(011); 2.166(22)(206); 1.662(19)(119); 2.050(18)(303); 3.054(17)(105) Yeomanite is orthorhombic, Pnma, a = 6.585(10), b = 3.855(6), c = 17.26(1) Å, V = 438(1) Å3, Z = 4. Yeomanite is a new example of the growing family of lead oxychloride minerals that have a structure based upon oxocentred OPb4 tetrahedra, which, in this mineral, jointly with OHPb3 triangles, form [O(OH)Pb2]+ chains similar to those observed in synthetic Pb2O(OH)I. Yeomanite is structurally related to sidpietersite, penfieldite and laurionite.

Keywords

yeomanitenew mineralPb oxyhalideoxocentred unitscrystal structureMerehead quarry
Type
Research Article
Information
Mineralogical Magazine , Volume 79 , Issue 5 , October 2015 , pp. 1203 - 1211
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2015

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References

Brese, N.E. and O'Keeffe, M. (1991) Bond-valence parameters for solids. Ada Crystallographica, B47, 192–197.Google Scholar
Cooper, M.A. and Hawthorne, EC. (1995) Diaboleite, Pb2Cu(OH)4Cl2, a defect perovskite structure with stereoactive lone-pair behavior of Pb2+ . The Canadian Mineralogist, 33, 1125–1129.Google Scholar
Cooper, M.A. and Hawthorne, EC. (1999) The structure topology of sidpietersite, Pb4 +S6+O3S2∼O2(OH)2, a novel thiosulfate structure. The Canadian Mineralogist, 37, 1275–1282.Google Scholar
Krivovichev, S.V. and Brown, I.D. (2001) Are the compressive effects of encapsulation an artifact of the bond valence parameters. Zeitschrift fur Kristallographie, 216, 245–247.Google 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, 103-11.CrossRefGoogle Scholar
Krivovichev, S.V, Mentre, O., Siidra, O.I., Colmont, M. and Filatov, S.K. (2013) Anion-centered tetrahedra in inorganic compounds. Chemical Reviews, 113, 6459–6535.CrossRefGoogle ScholarPubMed
le Page, Y. (1987) Computer derivation of the symmetry elements implied in a structure description. Journal of Applied Crystallography, 20, 264–269.CrossRefGoogle Scholar
Merlino, S., Pasero, M., Perchiazzi, N. and Gianfagna, A. (1995) X-ray and electron diffraction study of penfieldite: average structure and multiple cells. Mineralogical Magazine, 59, 341–347 CrossRefGoogle Scholar
Rouse, R.C. and Dunn, P.J. (1990). A new lead sulphate oxychloride related to the nadorite group from Brilon, Germany. Neues Jahrbuch fur Mineralogie Monatshefte, 1990, 337–342.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.Y, 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(1), 59-73.Google Scholar
Siidra, O.I., Krivovichev, S.Y, Armbruster, T and Depmeier, W. (2007) Lead rare-earth oxyhalides: syntheses and characterization of PbgLaOyX (X = Cl, Br). Inorganic Chemistry, 46, 1523–1525.CrossRefGoogle Scholar
Siidra, O.I., Krivovichev, S.Y, Turner, R.W. and Rumsey, M.S. (2008) Chloroxiphite Pb3CuO2(OH)2Cl2 structure refinement and description in terms of oxocen-tered OPb4 tetrahedra. Mineralogical Magazine, 72, 793–798.CrossRefGoogle Scholar
Siidra, O.I., Krivovichev, S.Y, Turner, R.W., Rumsey, M. S. and Spratt, I (2013a) Crystal chemistry of layered Pb oxychloride minerals with PbO-related structures. I. Crystal structure of hereroite, [Pb32O20(O,D)] (AsO4)2((Si,As,YMo)O4)2Cl10. American Mineralogist, 98, 248–255.CrossRefGoogle Scholar
Siidra, O.I., Krivovichev, S.Y, Turner, R.W., Rumsey, M. S. and Spratt, J. (20136) Crystal chemistry of layered Pb oxychloride minerals with PbO-related structures. II. Crystal structure of vladkrivovichevite, [Pb32Oi8] [Pb4Mn2O]Cl14(BO3)8-2H2O. American Mineralogist, 98,256-261.Google Scholar
Siidra, O.I., Zenko, D.Y and Krivovichev, S.Y (2013c). Crystal structure of novel synthetic compound Pb2O (OH)I and structure refinement of ‘iodolaurionite', Pb (OH)I: hydroxo-and oxocentered units in Pb minerals and synthetic compounds. Mineralogical Magazine, 11, 3239–3248.CrossRefGoogle Scholar
Spek, A.L. (2003) Single-crystal structure validation with the program PLATON. Journal of Applied Crystallography, 36, 7–13.CrossRefGoogle Scholar
Spencer, L.J. and Mountain, E.D. (1923) New lead-copper minerals from the Mendip Hills, Somerset. Mineralogical Magazine, 20, 67–92.CrossRefGoogle Scholar
Turner, R. W. (2006) A mechanism for the formation of the mineralised manganese deposits at Merehead Quarry, Cranmore, Somerset, 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. Y, Stanley, C.S. and Spratt, J. (2012a). Hereroite and vladkrivovichevite-two novel lead oxychlorides from the Kombat mine, Namibia. Mineralogical Magazine, 76(4), 883-890.Google Scholar
Turner, R.W., Siidra, O.I., Krivovichev, S.Y, Stanley, C.S. and Spratt, J. (20126): Rumseyite, [Pb2OF]Cl, the first naturally occurring fluoroxychloride mineral with the parent crystal structure for layered lead oxychlorides. Mineralogical Magazine, 76(5), 1247—1255.Google Scholar
Venetopoulos, C.C. and Rentzeperis, P.J. (1975) The crystal structure of laurionite, Pb(OH)Cl. Zeitschrift fur Kristallographie, 141, 246–259.CrossRefGoogle Scholar
Welch, M.D. and Lepore, G.O. (2010). The crystal structure of parkinsonite, nominally Pb7MoO9Cl2: a naturally occurring Aurivillius phase. Mineralogical Magazine, 74, 269–275.Google Scholar
Welch, M.D., Criddle, A.J. and Symes, R.E (1998) Mereheadite, Pb2O(OH)Cl: a new litharge-related oxychloride from Merehead Quarry, Cranmore, Somerset. Mineralogical Magazine, 62, 387–393.CrossRefGoogle Scholar
Welch, M.D., Cooper, M.A., Hawthorne, EC. and Criddle, A.J. (2000) Symesite, Pb10(SO4) O7Cl4(H2O), a new PbO-related sheet mineral: description and crystal structure. American Mineralogist, 85, 1526–1533.CrossRefGoogle Scholar
Williams, P.A., Hatert, E, Pasero, M. and Mills, S.J. (2012) Plumbonacrite, IMA 11-G. CNMNC Newsletter 14, October 2012, page 1288. Mineralogical Magazine, 76, 1281–1288.CrossRefGoogle Scholar