scholarly journals Lithochemistry and aqueous metal transport in the Keno Hill mining district, central Yukon Territory

1994 ◽  
Author(s):  
Y T J Kwong ◽  
C Roots ◽  
W Kettley
Keyword(s):  
Metal Transport ◽  
Yukon Territory ◽  
Mining District

Post-mine metal transport and attenuation in the Keno Hill mining district, central Yukon, Canada

1997 ◽  
Vol 30 (1-2) ◽  
pp. 98-107 ◽  
Author(s):  
Y. T. J. Kwong ◽  
C. F. Roots ◽  
P. Roach ◽  
W. Kettley
Keyword(s):  
Metal Transport ◽  
Mining District

scholarly journals Penikisite, BaMg2Al2(PO4)3(OH)3, isostructural with bjarebyite

2013 ◽  
Vol 69 (2) ◽  
pp. i4-i5 ◽  
Author(s):  
Michael G. Bowman ◽  
Robert T. Downs ◽  
Hexiong Yang
Keyword(s):  
Hydrogen Bonding ◽  
Microprobe Analysis ◽  
Three Dimensional ◽  
Yukon Territory ◽  
Mining District ◽  
Site Symmetry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dimensional Network

The bjarebyite group of minerals, characterized by the general formula BaX2Y2(PO4)3(OH)3, withX= Mg, Fe2+or Mn2+, andY= Al or Fe3+, includes five members: bjarebyite BaMn2+2Al2(PO4)3(OH)3, johntomaite BaFe2+2Fe3+2(PO4)3(OH)3, kulanite BaFe2+2Al2(PO4)3(OH)3, penikisite BaMg2Al2(PO4)3(OH)3, and perloffite BaMn2+2Fe3+2(PO4)3(OH)3. Thus far, the crystal structures of all minerals in the group, but penikisite, have been determined. The present study reports the first structure determination of penikisite (barium dimagnesium dialuminium triphosphate trihydroxide) using single-crystal X-ray diffraction data of a crystal from the type locality, Mayo Mining District, Yukon Territory, Canada. Penikisite is isotypic with other members of the bjarebyite group with space groupP21/m, rather than triclinic (P1 orP-1), as previously suggested. Its structure consists of edge-shared [AlO3(OH)3] octahedral dimers linkingviacorners to form chains along [010]. These chains are decorated with PO4tetrahedra (one of which has site symmetrym) and connected along [100]viaedge-shared [MgO5(OH)] octahedral dimers and eleven-coordinated Ba2+ions (site symmetrym), forming a complex three-dimensional network. O—H...O hydrogen bonding provides additional linkage between chains. Microprobe analysis of the crystal used for data collection indicated that Mn substitutes for Mg at the 1.5% (apfu) level.

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