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Mineralogy and Petrology

, Volume 100, Issue 3–4, pp 249–253 | Cite as

The crystal structure of waylandite from Wheal Remfry, Cornwall, United Kingdom

  • Stuart J. Mills
  • Anthony R. Kampf
  • Mati Raudsepp
  • William D. Birch
Original Paper

Abstract

Sr- and Ca-rich waylandite, \( {\left( {{\hbox{B}}{{\hbox{i}}_{0.{54}}}{\hbox{S}}{{\hbox{r}}_{0.{31}}}{\hbox{C}}{{\hbox{a}}_{0.{25}}}{{\hbox{K}}_{0.0{1}}}{\hbox{B}}{{\hbox{a}}_{0.0{1}}}} \right)_{\Sigma 1.12}}{{\hbox{H}}_{0.{18}}}{\left( {{\hbox{A}}{{\hbox{l}}_{{2}.{96}}}{\hbox{C}}{{\hbox{u}}_{0.0{2}}}} \right)_{\Sigma 2.98}}{\left[ {{{\left( {{{\hbox{P}}_{0.{97}}}{{\hbox{S}}_{0.0{3}}}{\hbox{S}}{{\hbox{i}}_{0.0{1}}}} \right)}_{\Sigma 1.00}}{{\hbox{O}}_4}} \right]_2}{\left( {\hbox{OH}} \right)_6} \), from Wheal Remfry, Cornwall, United Kingdom has been investigated by single-crystal X-ray diffraction and electron microprobe analyses. Waylandite crystallises in space group R \( \overline 3 \)m, with the cell parameters: a = 7.0059(7) Å, c = 16.3431(12) Å and V = 694.69(11) Å3. The crystal structure has been refined to R 1 = 3.76%. Waylandite has an alunite-type structure comprised of a rhombohedral stacking of (001) composite layers of corner-shared AlO6 octahedra and PO4 tetrahedra, with (Bi,Sr,Ca) atoms occupying icosahedrally coordinated sites between the layers.

Keywords

Jarosite Topaz Alunite Thermal Displacement Parameter Typical Rhombohedral 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The Associate Editor, Lutz Nasdala and two anonymous reviewers, provided helpful comments on the manuscript. NSERC Canada is thanked for a Discovery Grant to Mati Raudsepp. Part of this study was funded by the John Jago Trelawney Endowment to the Mineral Sciences Department of the Natural History Museum of Los Angeles County. Steve Rust is thanked for donating the specimen used in this study.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Stuart J. Mills
    • 1
    • 2
  • Anthony R. Kampf
    • 3
  • Mati Raudsepp
    • 1
  • William D. Birch
    • 2
  1. 1.Department of Earth and Ocean SciencesUniversity of British ColumbiaVancouverCanada
  2. 2.GeosciencesMuseum VictoriaMelbourneAustralia
  3. 3.Mineral Sciences DepartmentNatural History Museum of Los Angeles CountyLos AngelesUSA

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