Agardite-(Y), Cu2+ 6Y(AsO4) 3(OH)6·3H2O

Shaunna M. Morrison; Kenneth J. Domanik; Marcus J. Origlieri; Robert T. Downs

doi:10.1107/S1600536813023477

Agardite-(Y), Cu²⁺ ₆Y(AsO₄) ₃(OH)₆·3H₂O

Shaunna M. Morrison, Kenneth J. Domanik, Marcus J. Origlieri, Robert T. Downs

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Agardite-(Y), with a refined formula of Cu²⁺ _5.70(Y_0.69Ca_0.31)[(As_0.83P _0.17)O₄]₃(OH)6·3H₂O [ideally Cu²⁺ ₆Y(AsO₄)₃(OH) ₆·3H2O, hexacopper(II) yttrium tris(arsenate) hexahydroxide trihydrate], belongs to the mixite mineral group which is characterized by the general formula Cu²⁺ ₆A(TO₄) ₃(OH)₆·3H₂O, where nine-coordinated cations in the A-site include rare earth elements along with Al, Ca, Pb, or Bi, and the T-site contains P or As. This study presents the first structure determination of agardite-(Y). It is based on the single-crystal X-ray diffraction of a natural sample from Jote West mine, Pampa Larga Mining District, Copiapo, Chile. The general structural feature of agardite-(Y) is characterized by infinite chains of edge-sharing CuO5 square pyramids (site symmetry 1) extending down the c axis, connected in the ab plane by edge-sharing YO9 polyhedra (site symmetry -6..) and corner-sharing AsO4 tetrahedra (site symmetry m..). Hydroxyl groups occupy each corner of the CuO5-square pyramids not shared by a neighboring As or Y atom. Each YO9 polyhedron is surrounded by three tubular channels. The walls of the channels, parallel to the c axis, are six-membered hexagonal rings comprised of CuO5 and AsO4 polyhedra in a 2:1 ratio, and contain free molecules of lattice water.

Original language	English (US)
Pages (from-to)	i61-i62
Journal	Acta Crystallographica Section E: Structure Reports Online
Volume	69
Issue number	9
DOIs	https://doi.org/10.1107/S1600536813023477
State	Published - Sep 2013
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1107/S1600536813023477

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title = "Agardite-(Y), Cu2+ 6Y(AsO4) 3(OH)6·3H2O",

abstract = "Agardite-(Y), with a refined formula of Cu2+ 5.70(Y0.69Ca0.31)[(As0.83P 0.17)O4]3(OH)6·3H2O [ideally Cu2+ 6Y(AsO4)3(OH) 6·3H2O, hexacopper(II) yttrium tris(arsenate) hexahydroxide trihydrate], belongs to the mixite mineral group which is characterized by the general formula Cu2+ 6A(TO4) 3(OH)6·3H2O, where nine-coordinated cations in the A-site include rare earth elements along with Al, Ca, Pb, or Bi, and the T-site contains P or As. This study presents the first structure determination of agardite-(Y). It is based on the single-crystal X-ray diffraction of a natural sample from Jote West mine, Pampa Larga Mining District, Copiapo, Chile. The general structural feature of agardite-(Y) is characterized by infinite chains of edge-sharing CuO5 square pyramids (site symmetry 1) extending down the c axis, connected in the ab plane by edge-sharing YO9 polyhedra (site symmetry -6..) and corner-sharing AsO4 tetrahedra (site symmetry m..). Hydroxyl groups occupy each corner of the CuO5-square pyramids not shared by a neighboring As or Y atom. Each YO9 polyhedron is surrounded by three tubular channels. The walls of the channels, parallel to the c axis, are six-membered hexagonal rings comprised of CuO5 and AsO4 polyhedra in a 2:1 ratio, and contain free molecules of lattice water.",

author = "Morrison, {Shaunna M.} and Domanik, {Kenneth J.} and Origlieri, {Marcus J.} and Downs, {Robert T.}",

year = "2013",

month = sep,

doi = "10.1107/S1600536813023477",

language = "English (US)",

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pages = "i61--i62",

journal = "Acta Crystallographica Section E: Structure Reports Online",

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number = "9",

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T1 - Agardite-(Y), Cu2+ 6Y(AsO4) 3(OH)6·3H2O

AU - Morrison, Shaunna M.

AU - Domanik, Kenneth J.

AU - Origlieri, Marcus J.

AU - Downs, Robert T.

PY - 2013/9

Y1 - 2013/9

N2 - Agardite-(Y), with a refined formula of Cu2+ 5.70(Y0.69Ca0.31)[(As0.83P 0.17)O4]3(OH)6·3H2O [ideally Cu2+ 6Y(AsO4)3(OH) 6·3H2O, hexacopper(II) yttrium tris(arsenate) hexahydroxide trihydrate], belongs to the mixite mineral group which is characterized by the general formula Cu2+ 6A(TO4) 3(OH)6·3H2O, where nine-coordinated cations in the A-site include rare earth elements along with Al, Ca, Pb, or Bi, and the T-site contains P or As. This study presents the first structure determination of agardite-(Y). It is based on the single-crystal X-ray diffraction of a natural sample from Jote West mine, Pampa Larga Mining District, Copiapo, Chile. The general structural feature of agardite-(Y) is characterized by infinite chains of edge-sharing CuO5 square pyramids (site symmetry 1) extending down the c axis, connected in the ab plane by edge-sharing YO9 polyhedra (site symmetry -6..) and corner-sharing AsO4 tetrahedra (site symmetry m..). Hydroxyl groups occupy each corner of the CuO5-square pyramids not shared by a neighboring As or Y atom. Each YO9 polyhedron is surrounded by three tubular channels. The walls of the channels, parallel to the c axis, are six-membered hexagonal rings comprised of CuO5 and AsO4 polyhedra in a 2:1 ratio, and contain free molecules of lattice water.

AB - Agardite-(Y), with a refined formula of Cu2+ 5.70(Y0.69Ca0.31)[(As0.83P 0.17)O4]3(OH)6·3H2O [ideally Cu2+ 6Y(AsO4)3(OH) 6·3H2O, hexacopper(II) yttrium tris(arsenate) hexahydroxide trihydrate], belongs to the mixite mineral group which is characterized by the general formula Cu2+ 6A(TO4) 3(OH)6·3H2O, where nine-coordinated cations in the A-site include rare earth elements along with Al, Ca, Pb, or Bi, and the T-site contains P or As. This study presents the first structure determination of agardite-(Y). It is based on the single-crystal X-ray diffraction of a natural sample from Jote West mine, Pampa Larga Mining District, Copiapo, Chile. The general structural feature of agardite-(Y) is characterized by infinite chains of edge-sharing CuO5 square pyramids (site symmetry 1) extending down the c axis, connected in the ab plane by edge-sharing YO9 polyhedra (site symmetry -6..) and corner-sharing AsO4 tetrahedra (site symmetry m..). Hydroxyl groups occupy each corner of the CuO5-square pyramids not shared by a neighboring As or Y atom. Each YO9 polyhedron is surrounded by three tubular channels. The walls of the channels, parallel to the c axis, are six-membered hexagonal rings comprised of CuO5 and AsO4 polyhedra in a 2:1 ratio, and contain free molecules of lattice water.

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Agardite-(Y), Cu²⁺ ₆Y(AsO₄) ₃(OH)₆·3H₂O

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