Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
The Canadian Mineralogist Email Content Delivery
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
The Canadian Mineralogist; June 2004; v. 42; no. 3; p. 753-761; DOI: 10.2113/gscanmin.42.3.753
© 2004 Mineralogical Association of Canada
This Article
Right arrow Résumé
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cooper, M. A.
Right arrow Articles by Hawthorne, F. C.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Articles

THE CRYSTAL STRUCTURE OF GOLDQUARRYITE, (Cu2+,{square})(Cd,Ca)2Al3(PO4)4F2(H2O)10{(H2O),F}2, A SECONDARY PHOSPHATE FROM THE GOLD QUARRY MINE, EUREKA COUNTY, NEVADA, U.S.A.

Mark A. Cooper and Frank C. Hawthorne§

Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada

§ E-mail address: frank_hawthorne{at}umanitoba.ca

The crystal structure of goldquarryite, (Cu0.70{square}0.30)(Cd1.67Ca0.33)Al3 (PO4)4F2(H2O)10 {(H2O),F}2, triclinic, PFormula, a 6.787(1), b 9.082(2), c 10.113(2) Å, {alpha} 101.40(1), ß 104.27(1), {gamma} 102.51(1)°, V 568.7(3) Å3, Z = 1, was solved by direct methods and refined to an R index of 5.2% based on 1630 observed reflections collected on a four-circle diffractometer equipped with a 1K CCD detector and MoK{alpha} X-radiation. The structure contains two crystallographically distinct (PO4) groups, three distinct {Al(1)O4F2}, {Al(2)O4F2} and {Al(3)O2(H2O)4} octahedra, one {CdO4(H2O)2} octahedron and one {CuO2(H2O)4} octahedron where Cu = (Cu0.70 2+ + {square}0.30). The {Al(1)O4F2} and {Al(2)O4F2} octahedra share corners through common F vertices to form an [Al{phi}5] chain ({phi}: unspecified anion) that extends along the a direction. This chain is decorated by (PO4) tetrahedra that link to the four O atoms of each (Al{phi}6) octahedron, linking the [Al{phi}5] chain along its length to form an [Al(PO4)2F] chain. {CdO4(H2O)2} octahedra share edges to form a [CdO2(H2O)2] chain that also extends along a. These two types of chains link through the (PO4) tetrahedra to form a sheet of composition [AlCd(PO4)2F(H2O)2], which we designate as the A layer, in the (001) plane. The Al(3) and Cu sites are intercalated between the A layers, forming {CuO2(H2O)4} and {Al(3)O2(H2O)4} octahedra that are isolated from each other. These two octahedra form an open layer, the B layer, in which both octahedra form linear arrays extending in the a direction. The B layer links to the A layer by sharing octahedron corners with (PO4) tetrahedra. The A and B layers alternate along the c axis to form a heteropolyhedral framework. There are interstitial channels within this framework, also extending along a, and these are filled with the H atoms of the (H2O) groups that coordinate the cations of the B layer.

Keywords: goldquarryite, phosphate, crystal structure, Gold Quarry mine, Eureka County, Nevada.




This article has been cited by other articles:


Home page
 Can MineralHome page
W. H. Paar, M. A. Cooper, F. C. Hawthorne, E. Moffatt, M. E. Gunter, A. C. Roberts, and P. J. Dunn
BRAITHWAITEITE, NaCu5(TiSb)O2(AsO4)4[AsO3(OH)]2(H2O)8, A NEW MINERAL SPECIES FROM LAURANI, BOLIVIA
Can Mineral, August 1, 2009; 47(4): 947 - 952.
[Abstract] [Full Text] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Mineralogical Association of Canada