On the dissolution of gold in K2Qx and Na2Qx fluxes (Q=S, Se). Formation of KAuS5, KAuSe5, CsAuSe3, KAuSe2 and NaAuSe2: Low-dimensional Au+ and Au3+ compounds with poly- and mono-chalcogenide ligands

Younbong Park, Mercouri G Kanatzidis

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19 Citations (Scopus)

Abstract

Five compounds of gold, KAuS5, KAuSe5, CsAuSe3, KAuSe2 and NaAuSe2 are reported. Their preparation was accomplished by dissolving gold in molten alkali polychalcogenide salts in the temperature range of 250-350°C. KAuS5 and KAuSe5 crystallize in the space group Ibam with a=8.310(2) Å, b=10.758(3) Å, c=15.468(4) Å, V=1383 Å3, and a=8.625(6) Å, b=11.293(9) Å, c=16.425(11) Å, V=1600 Å3, respectively. CsAuSe3, crystallizes in the space group C2/c with a=6.483(3) Å, b=13.789(5) Å, c=7.651(3) Å, β=112.17(3)°, V=633 Å3. KAuSe2 crystallizes in the space group P4/mbm with a=b=7.699(3) Å, c=3.665(1) Å, V=217 Å3. Finally NaAuSe2 crystallizes in the space group P21/c with a=6.991(8) Å, b=8.374(9) Å, c=6.724(8) Å, β=105.23(9)°, V=379.8 Å3. KAuS5 and KAuSe5 have one-dimensional infinite [AuQ5]- chains with linear Au+ atoms connected with Q2-5 ligands. There are close Au-Au interactions between the chains. CsAuSe3 has a similar one-dimensional structure but the [AuSe3]- chains are helical and there are no Au-Au interactions between the chains. KAuSe2 and NaAuSe2 are Au3+ compounds where the gold atoms are in square planar geometry. The K+ salt has infinite ribbons of [AuSe2]- but the Na salt has corrugated layers of [AuSe2]-. Spectroscopic characterization of the compounds is reported.

Original languageEnglish
Pages (from-to)137-145
Number of pages9
JournalJournal of Alloys and Compounds
Volume257
Issue number1-2
Publication statusPublished - Jul 25 1997

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Gold Compounds
Gold
Dissolution
Salts
Ligands
Fluxes
Atoms
Alkalies
Molten materials
Geometry
Temperature

Keywords

  • CsAuSe
  • Dissolution of gold
  • KAuS
  • KAuSe
  • KAuSe
  • NaAuSe

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

@article{d823996cf3d34689b1cb76d65e10bde5,
title = "On the dissolution of gold in K2Qx and Na2Qx fluxes (Q=S, Se). Formation of KAuS5, KAuSe5, CsAuSe3, KAuSe2 and NaAuSe2: Low-dimensional Au+ and Au3+ compounds with poly- and mono-chalcogenide ligands",
abstract = "Five compounds of gold, KAuS5, KAuSe5, CsAuSe3, KAuSe2 and NaAuSe2 are reported. Their preparation was accomplished by dissolving gold in molten alkali polychalcogenide salts in the temperature range of 250-350°C. KAuS5 and KAuSe5 crystallize in the space group Ibam with a=8.310(2) {\AA}, b=10.758(3) {\AA}, c=15.468(4) {\AA}, V=1383 {\AA}3, and a=8.625(6) {\AA}, b=11.293(9) {\AA}, c=16.425(11) {\AA}, V=1600 {\AA}3, respectively. CsAuSe3, crystallizes in the space group C2/c with a=6.483(3) {\AA}, b=13.789(5) {\AA}, c=7.651(3) {\AA}, β=112.17(3)°, V=633 {\AA}3. KAuSe2 crystallizes in the space group P4/mbm with a=b=7.699(3) {\AA}, c=3.665(1) {\AA}, V=217 {\AA}3. Finally NaAuSe2 crystallizes in the space group P21/c with a=6.991(8) {\AA}, b=8.374(9) {\AA}, c=6.724(8) {\AA}, β=105.23(9)°, V=379.8 {\AA}3. KAuS5 and KAuSe5 have one-dimensional infinite [AuQ5]- chains with linear Au+ atoms connected with Q2-5 ligands. There are close Au-Au interactions between the chains. CsAuSe3 has a similar one-dimensional structure but the [AuSe3]- chains are helical and there are no Au-Au interactions between the chains. KAuSe2 and NaAuSe2 are Au3+ compounds where the gold atoms are in square planar geometry. The K+ salt has infinite ribbons of [AuSe2]- but the Na salt has corrugated layers of [AuSe2]-. Spectroscopic characterization of the compounds is reported.",
keywords = "CsAuSe, Dissolution of gold, KAuS, KAuSe, KAuSe, NaAuSe",
author = "Younbong Park and Kanatzidis, {Mercouri G}",
year = "1997",
month = "7",
day = "25",
language = "English",
volume = "257",
pages = "137--145",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
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TY - JOUR

T1 - On the dissolution of gold in K2Qx and Na2Qx fluxes (Q=S, Se). Formation of KAuS5, KAuSe5, CsAuSe3, KAuSe2 and NaAuSe2

T2 - Low-dimensional Au+ and Au3+ compounds with poly- and mono-chalcogenide ligands

AU - Park, Younbong

AU - Kanatzidis, Mercouri G

PY - 1997/7/25

Y1 - 1997/7/25

N2 - Five compounds of gold, KAuS5, KAuSe5, CsAuSe3, KAuSe2 and NaAuSe2 are reported. Their preparation was accomplished by dissolving gold in molten alkali polychalcogenide salts in the temperature range of 250-350°C. KAuS5 and KAuSe5 crystallize in the space group Ibam with a=8.310(2) Å, b=10.758(3) Å, c=15.468(4) Å, V=1383 Å3, and a=8.625(6) Å, b=11.293(9) Å, c=16.425(11) Å, V=1600 Å3, respectively. CsAuSe3, crystallizes in the space group C2/c with a=6.483(3) Å, b=13.789(5) Å, c=7.651(3) Å, β=112.17(3)°, V=633 Å3. KAuSe2 crystallizes in the space group P4/mbm with a=b=7.699(3) Å, c=3.665(1) Å, V=217 Å3. Finally NaAuSe2 crystallizes in the space group P21/c with a=6.991(8) Å, b=8.374(9) Å, c=6.724(8) Å, β=105.23(9)°, V=379.8 Å3. KAuS5 and KAuSe5 have one-dimensional infinite [AuQ5]- chains with linear Au+ atoms connected with Q2-5 ligands. There are close Au-Au interactions between the chains. CsAuSe3 has a similar one-dimensional structure but the [AuSe3]- chains are helical and there are no Au-Au interactions between the chains. KAuSe2 and NaAuSe2 are Au3+ compounds where the gold atoms are in square planar geometry. The K+ salt has infinite ribbons of [AuSe2]- but the Na salt has corrugated layers of [AuSe2]-. Spectroscopic characterization of the compounds is reported.

AB - Five compounds of gold, KAuS5, KAuSe5, CsAuSe3, KAuSe2 and NaAuSe2 are reported. Their preparation was accomplished by dissolving gold in molten alkali polychalcogenide salts in the temperature range of 250-350°C. KAuS5 and KAuSe5 crystallize in the space group Ibam with a=8.310(2) Å, b=10.758(3) Å, c=15.468(4) Å, V=1383 Å3, and a=8.625(6) Å, b=11.293(9) Å, c=16.425(11) Å, V=1600 Å3, respectively. CsAuSe3, crystallizes in the space group C2/c with a=6.483(3) Å, b=13.789(5) Å, c=7.651(3) Å, β=112.17(3)°, V=633 Å3. KAuSe2 crystallizes in the space group P4/mbm with a=b=7.699(3) Å, c=3.665(1) Å, V=217 Å3. Finally NaAuSe2 crystallizes in the space group P21/c with a=6.991(8) Å, b=8.374(9) Å, c=6.724(8) Å, β=105.23(9)°, V=379.8 Å3. KAuS5 and KAuSe5 have one-dimensional infinite [AuQ5]- chains with linear Au+ atoms connected with Q2-5 ligands. There are close Au-Au interactions between the chains. CsAuSe3 has a similar one-dimensional structure but the [AuSe3]- chains are helical and there are no Au-Au interactions between the chains. KAuSe2 and NaAuSe2 are Au3+ compounds where the gold atoms are in square planar geometry. The K+ salt has infinite ribbons of [AuSe2]- but the Na salt has corrugated layers of [AuSe2]-. Spectroscopic characterization of the compounds is reported.

KW - CsAuSe

KW - Dissolution of gold

KW - KAuS

KW - KAuSe

KW - KAuSe

KW - NaAuSe

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M3 - Article

AN - SCOPUS:0031175935

VL - 257

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EP - 145

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

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