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A contribution to understanding the complex nature of peisleyite

Published online by Cambridge University Press:  05 July 2018

S. J. Mills ,
C. Ma  and
W. D. Birch
S. J. Mills*
Affiliation:
Geosciences, Museum Victoria, GPO Box 666, Melbourne 3001, Victoria, Australia
C. Ma
Affiliation:
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA
W. D. Birch
Affiliation:
Geosciences, Museum Victoria, GPO Box 666, Melbourne 3001, Victoria, Australia
*
*E-mail: [email protected]
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Abstract

The type specimen of peisleyite has been reinvestigated by a combination of scanning electron microscopy, electron probe microanalysis (EPMA) and synchrotron powder X-ray diffraction. Morphological investigation showed that mats of peisleyite crystals, individually <3 μm across, are intergrown with wavellite veinlets to form the white cryptocrystalline material that is typical of ‘peisleyite’. New EPMA data (mean of 12 analyses) gave the empirical formula of peisleyite as (Na1.69Ca0.18)Σ1.87(Al9.04Fe0.03)Σ9.07[(P6.28S1.38Si0.25)O4]Σ7.91(OH)6.66·27.73H2O, or ideally Na2Al9[(P,S)O4]8(OH)6·28H2O. The associated wavellite was found to be F-rich. Synchrotron powder data were indexed and refined and gave the following unit cell: P1̄, a = 9.280(19), b = 11.976(19), c = 13.250(18) Å, α = 91.3(1), β = 75.6(1), γ = 67.67(1)°, V = 1308(5) Å3 and Z = 4. These data are significantly different to those reported in the original description of peisleyite.

Keywords

peisleyitewavellitephosphatesulphateToms phosphate quarrySouth Australiasynchrotron
Type
Research Article
Information
Mineralogical Magazine , Volume 75 , Issue 6 , December 2011 , pp. 2733 - 2737
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2011

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References

Frost, R.L., Mills, S.J. and Erickson, K.L. (2004) Thermal decomposition of peisleyite: a thermogravimetry and hot stage Raman spectroscopic study. Thermochimica Acta, 419, 109-114.CrossRefGoogle Scholar
Frost, R.L., Mills, S.J. and Weier, M.L. (2005) Peisleyite, an unusual mixed anion mineral: a vibrational spectroscopic study. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 61, 177-184.CrossRefGoogle ScholarPubMed
Laugier, J. and Bochu, B. (2004) Chekcell: Graphical powder indexing cell and space group assignment software. http://www.ccp14.ac.uk/tutorial/lmgp/.Google Scholar
Mandarino, J.A. (1981) The Gladstone–Dale relationship. IV. The compatibility concept and its application. The Canadian Mineralogist, 19, 441-450.Google Scholar
Mills, S.J., Kartashov, P.M., Ma, C., Rossman, G.R., Novgorodova, M.I., Kampf, A.R. and Raudsepp, M. (2011) Yttriaite-(Y): the natural occurrence of Y2O3 from the Bol’shaya Pol’ya river, Russian Federation. American Mineralogist, 96, 1166-1170.CrossRefGoogle Scholar
Pilkington, E.S., Segnit, E.R. and Watts, J.A. (1982) Peisleyite, a new sodium aluminium sulphate phosphate. Mineralogical Magazine, 46, 449-452.CrossRefGoogle Scholar
Shirley, R. (2002) The Crysfire 2002 System for Automatic Powder Indexing: User's Manual. The Lattice Press, 41 Guildford Park Avenue, Guildford, Surrey, UK.Google Scholar