TY - JOUR
T1 - Flux Synthesis of LiAuS and NaAuS
T2 - "Chicken-Wire-Like" Layer Formation by Interweaving of (AuS)nn- Threads. Comparison with α-HgS and AAuS (A = K, Rb)
AU - Axtell, Enos A.
AU - Liao, Ju Hsiou
AU - Kanatzidis, Mercouri G.
PY - 1998
Y1 - 1998
N2 - From the reaction of Au with alkali metal polysulfide liquids, LiAuS and NaAuS were discovered. Orange crystals of LiAuS crystallize in the monoclinic space group C2/c, (no. 15), with a = 8.994(2) Å, b = 8.956(2) Å, c = 7.201(3) Å, β= 128.68(1)°, and Z = 8. Light-yellow planks of NaAuS crystallize in the orthorhombic space group Ccca, (no. 68), with a = 14.658(5) Å, b = 21.043(7) Å, c = 7.118(4) Å, and Z = 32. Both compounds contain infinite one-dimensional (AuS)nn- chains, featuring alternating sulfide anions and linear coordinated Au centers. In LiAuS, the chains are zigzag and fully extended and they pack in two mutually perpendicular sets. In NaAuS, the same chains coil in an unusual fashion so that they become interwoven to form layers reminiscent of "chicken-wire". This novel coiling mode allows Au-Au contacts to form, which help to stabilize the structure. The structural relationships between LiAuS, NaAuS, Na7Au5S6, AAuQ (A = K, Rb, Cs; Q = S, Se), and α-HgS are explored.
AB - From the reaction of Au with alkali metal polysulfide liquids, LiAuS and NaAuS were discovered. Orange crystals of LiAuS crystallize in the monoclinic space group C2/c, (no. 15), with a = 8.994(2) Å, b = 8.956(2) Å, c = 7.201(3) Å, β= 128.68(1)°, and Z = 8. Light-yellow planks of NaAuS crystallize in the orthorhombic space group Ccca, (no. 68), with a = 14.658(5) Å, b = 21.043(7) Å, c = 7.118(4) Å, and Z = 32. Both compounds contain infinite one-dimensional (AuS)nn- chains, featuring alternating sulfide anions and linear coordinated Au centers. In LiAuS, the chains are zigzag and fully extended and they pack in two mutually perpendicular sets. In NaAuS, the same chains coil in an unusual fashion so that they become interwoven to form layers reminiscent of "chicken-wire". This novel coiling mode allows Au-Au contacts to form, which help to stabilize the structure. The structural relationships between LiAuS, NaAuS, Na7Au5S6, AAuQ (A = K, Rb, Cs; Q = S, Se), and α-HgS are explored.
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U2 - 10.1021/ic980360b
DO - 10.1021/ic980360b
M3 - Article
C2 - 11670705
AN - SCOPUS:0000717229
SN - 0020-1669
VL - 37
SP - 5583
EP - 5587
JO - Inorganic chemistry
JF - Inorganic chemistry
IS - 21
ER -