Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/13818
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | The crystal chemistry of duftite, PbCuAsO4(OH) and the b-duftite problem |
Author: | Taylor, M. Bevan, D. Pring, A. |
Citation: | Mineralogical Magazine, 1998; 62(1):121-130 |
Publisher: | MINERALOGICAL SOC |
Issue Date: | 1998 |
ISSN: | 0026-461X 1471-8022 |
Statement of Responsibility: | Kharisun, Max R. Taylor, D. J. M. Bevan and Allan Pring |
Abstract: | <jats:title>Abstract</jats:title><jats:p>Duftite, PbCu(AsO<jats:sub>4</jats:sub>)(OH) is orthorhombic, space group<jats:italic>P</jats:italic>2<jats:sub>1</jats:sub>2<jats:sub>1</jats:sub>2<jats:sub>1</jats:sub>with<jats:italic>a</jats:italic>= 7.768(1),<jats:italic>b</jats:italic>= 9. 211(1),<jats:italic>c</jats:italic>= 5.999(1) Å, Z = 4; the structure has been refined to R = 4.6% and Rw = 6.5% using 640 observed reflections [F> 2σ(F)]. The structure consists of chains of edge-sharing CuO<jats:sub>6</jats:sub>‘octahedra’, parallel to c; which are linked via AsO<jats:sub>4</jats:sub>tetrahedra and Pb atoms in distorted square antiprismatic co-ordination to form a three dimensional network. The CuO<jats:sub>6</jats:sub>‘octahedra’ show Jahn-Teller distortion with the elongation running approximately along <627>. The hydrogen bonding network in the structure was characterized using bond valence calculations. ‘β-duftite’ is an intermediate in the duftite-conichalcite series, which has a modulated structure based on the intergrowth of the two structures in domains of approximately 50 Å. The origin of the modulation is thought to be associated with displacements in the oxygen lattice and is related to the orientation of the Jahn-Teller distortion of CuO<jats:sub>6</jats:sub>‘octahedra’. Approximately half of the strips show an elongation parallel to <627> while the other strips are elongated parallel to [010]. This ordering results in an increase in the<jats:italic>b</jats:italic>cell repeat compared to duftite and conichalcite.</jats:p> |
Rights: | Copyright 2004, American Geological Institute. |
DOI: | 10.1180/002646198547413 |
Published version: | http://minmag.geoscienceworld.org/cgi/content/abstract/62/1/121 |
Appears in Collections: | Aurora harvest 7 Geology & Geophysics publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.