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The crystal structure of kintoreite, PbFe3(PO4)2(OH,H2O)6

Published online by Cambridge University Press:  05 July 2018

Kharisu ,
M. R. Taylor ,
D. J. M. Bevan  and
A. Pring
Kharisu
Affiliation:
Department of Chemistry, Hinders University, GPO Box 2100 Adelaide, South Australia 5000, Australia
M. R. Taylor
Affiliation:
Department of Chemistry, Hinders University, GPO Box 2100 Adelaide, South Australia 5000, Australia
D. J. M. Bevan
Affiliation:
Department of Chemistry, Hinders University, GPO Box 2100 Adelaide, South Australia 5000, Australia
A. Pring
Affiliation:
Department of Mineralogy, South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia
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Abstract

The crystal structure of kintoreite, PbFe3(PO4)2(OH,H2O)6, has been refined. The mineral is rhombohedral, Rm with a = 7.3310(7), c = 16.885(2) Å, Z = 3; the structure has been refined to R = 3.0% and Rw = 3.0% using 183 observed reflections [I > 2σ(I)]. Kintoreite has the alunite-type structure which consists of sheets of corner-sharing Fe(O,OH)6 octahedra parallel to (001). The sheets are composed of clusters of three corner-linked octahedra which are tilted so that the three apical O atoms form the base of the XO4 tetrahedra. The clusters of octahedra are linked to similar groups by corner-sharing to form six membered rings. The Pb cations occupy the cavities between pairs of octahedral sheets and are surrounded by six oxygen atoms from the tetrahedra and six oxygen atoms from the octahedra to form a very distorted icosahedron. The mean bond lengths for the various coordination polyhedra are X–O 1.55 Å, (X= P, As, S); Fe–(O, OH) 2.01 Å; Pb–O 2.84 Å. The composition of the crystal used in the refinement was PbFe3(PO4)1.3(AsO4)0.4(SO4)0.3(OH,H2O)6. The XO4 anions are disordered, as in beudantite, rather than being ordered, as they are claimed to be in corkite.

Keywords

kintoreitebeudantitecorkitecrystal structureKintore opencutNew South Wales
Type
Mineralogy
Information
Mineralogical Magazine , Volume 61 , Issue 404 , February 1997 , pp. 123 - 129
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1997

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Footnotes

*

Permanent address: Fakultas Pertanian, Universitas Djenderal Soedirman, P.O. Box 25, Purwokerto 53101, Jawa-Tengah, Indonesia

References

Birch, W.D., Pring, A. and Gatehouse, B.M. (1992) Segnitite, PbFe3H(ASO4)2(OH)6, a new mineral in the lusungite group from Broken Hill, New South Wales, Australia. Amer. Mineral., 77, 656-59.Google Scholar
Brown, I.D. and Altermatt, D. (1985) Bond valence parameters obtained from a systematic analysis of endthe inorganic crystal structure database, Acta Crystallogr., B41, 241-±7CrossRefGoogle Scholar
Giuseppetti, G. and Tadini, C. (1987) Corkite PbFe3(SO4)(PO4)(OH)6, its crystal structure and ordered arrangement of tetrahedral cations. Neues Jahrb. Mineral. Mh., 71–81.Google Scholar
Giuseppetti, G. and Tadini, C. (1989) Beudantite PbFe3(SO4)(AsO2)(OH)6, its crystal structure, tetrahedral site disordering and scattered Pb distribution. Neues Jahrb. Mineral. Mh., 27–33.Google Scholar
Hall, S.R., Flack, H.D. and Stewart, J.M. (Editors) (1992) Xtal3.2 Reference Manual. University of Western Australia, Perth, Australia.Google Scholar
Mencetti, S. and Sabelli, C. (1976) Crystal chemistry of the alunite series: crystal structure refinement of alunite and synthetic jarosite. Neues Jahrb. Mineral. Mh, 406-17.Google Scholar
Pring, A., Birch, W.D., Dawe, J.R., Taylor, M.R., Deliens, M. and Walenta, K. (1995) Kintoreite, PbFe3(PO2)2(OH,H2O)6, a new mineral of the jarosite-alunite family, and lusungite discredited. Mineral. Mag., 59, 143-8.CrossRefGoogle Scholar
Rattray, K.J., Taylor, M.R., Bevan, D.L.M. and Pring, A. (1996) Compositional segregation and solid solution in the lead dominant alunite-type minerals from Broken Hill, N.S:W: Mineral. Mag., 60, 779-85.CrossRefGoogle Scholar
Scott, K:M. (1987) Solid solution in, and classification of, gossan derived members of the alunite-jarosite family, northwest Queensland, Australia. Amer. Mineral., 72, 178-87.Google Scholar
Shannon, R.D. (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr., B25 925–46.CrossRefGoogle Scholar
Szymáinski, J.T. (1988) The crystal structure of beudantite Pb(Fe,Al)3[(As,S)O4]2(OH)6 . Canad. Mineral., 26, 923-32.Google Scholar