Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Mineralogy and petrology, 2010-11, Vol.100 (3-4), p.249-253

Ort / Verlag

Vienna: Springer Vienna

Erscheinungsjahr

2010

Quelle

SpringerNature Journals

Beschreibungen/Notizen

• Sr- and Ca-rich waylandite, , 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   m , with the cell parameters: a  = 7.0059(7) Å, c  = 16.3431(12) Å and V  = 694.69(11) Å 3 . 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 AlO 6 octahedra and PO 4 tetrahedra, with (Bi,Sr,Ca) atoms occupying icosahedrally coordinated sites between the layers.