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Featured researches published by Fu Qiang Huang.


Journal of Alloys and Compounds | 2001

Syntheses and structures of the quaternary alkali-metal bismuth coinage-metal chalcogenides K3Bi5Cu2S10, CsBi2CuS4, RbBi2.66CuSe5, and CsBiAg2S3

Fu Qiang Huang; Kwasi Mitchell; James A. Ibers

Abstract The four compounds K 3 Bi 5 Cu 2 S 10 , CsBi 2 CuS 4 , RbBi 2.66 CuSe 5 , and CsBiAg 2 S 3 were synthesized at 873 K by reactions of the elements in the reactive fluxes of A 2 Q 3 (A=K, Rb, Cs; Q=S, Se). All crystallographic data were collected at 153 K. K 3 Bi 5 Cu 2 S 10 crystallizes in the Rb 3 Bi 5 Cu 2 S 10 structure type in space group Pnnm of the orthorhombic system with two formula units in a cell of dimensions a =14.173(2) A, b =17.690(2) A, c =4.0362(5) A; CsBi 2 CuS 4 crystallizes as a racemic twin in space group Cmc2 1 of the orthorhombic system with four formula units in a cell of dimensions a =4.0730(6) A, b =14.212(2) A, c =14.568(2) A; RbBi 2.66 CuSe 5 crystallizes in a new structure type in space group Cmcm of the orthorhombic system with four formula units in a cell of dimensions a =4.1961(9) A, b =14.420(3) A, c =18.266(4) A; CsBiAg 2 S 3 crystallizes in a new structure type in space group P2 1 /c of the monoclinic system with four formula units in a cell of dimensions a =13.3523(14) A, b =8.1052(8) A, c =6.9162(7) A, β =99.766(2)°. K 3 Bi 5 Cu 2 S 10 , CsBi 2 CuS 4 , and RbBi 2.66 CuSe 5 are related; they are all tunnel structures with the A atoms located in tunnels formed by BiQ 6 octahedra and CuQ 4 tetrahedra. CsBiAg 2 S 3 is composed of two-dimensional ∞ 2 [BiAg 2 S 3 1− ] layers separated by the Cs atoms. The ∞ 2 [BiAg 2 S 3 1− ] layer is built from BiS 6 octahedra, linear AgS 2 groups, and AgS 4 tetrahedra.


Angewandte Chemie | 2001

Oxide Addition to a Reactive Polysulfide Flux: Synthesis of K4Ba[Ti6OS20] Containing Isolated [Ti6OS8(S2)6]6− Clusters

Fu Qiang Huang; James A. Ibers

The zero-dimensional cluster compound K4 Ba[Ti6 OS8 (S2 )6 ] has been synthesized from a reactive flux similar to that of K2 Sn and Ti used in the synthesis of the one-dimensional compound K4 Ti3 S14 , but augmented by the deliberate introduction of TiO2 . The picture shows the structure of the [Ti6 OS8 (S2 )6 ]6- ion.


Inorganic Chemistry | 2008

Syntheses, crystal structures, and physical properties of La 5Cu6O4S7 and La5Cu 6.33O4S7

George H. Chan; Ming Ling Liu; Li Dong Chen; Fu Qiang Huang; Daniel E. Bugaris; Daniel M. Wells; John R. Ireland; Mark C. Hersam; Richard P. Van Duyne; James A. Ibers

Single crystal and bulk powder samples of the quaternary lanthanum copper oxysulfides La5Cu6.33O4S7 and La5Cu6O4S7 have been prepared by means of high-temperature sealed-tube reactions and spark plasma sintering, respectively. In the structure of La 5Cu6.33O4S7, Cu atoms tie together the fluorite-like (2)infinity[La5O4S(5+)] and antifluorite-like (2) infinity[Cu6S6(5-)] layers of La5Cu6O4S7. The optical band gap, E g, of 2.0 eV was deduced from both diffuse reflectance spectra on a bulk sample of La5Cu6O4S7 and for the (010) crystal face of a La 5Cu6.33O4S7 single crystal. Transport measurements at 298 K on a bulk sample of La 5Cu 6O 4S 7 indicated p-type metallic electrical conduction with sigma electrical =2.18 S cm(-1), whereas measurements on a La 5Cu6.33O4S7 single crystal led to sigma electrical =4.5 10(-3) S cm(-1) along [100] and to semiconducting behavior. In going from La 5Cu6O4S7 to La5Cu6.33O4S7, the disruption of the (2)infinity[Cu6S6(5-)] layer and the decrease in the overall Cu(2+)(3d(9)) concentration lead to a significant decrease in the electrical conductivity.


Inorganic Chemistry | 2008

Syntheses, crystal structures, and physical properties of La 5 Cu 6 O 4 S 7 and La 5 Cu 6.33 O 4 S 7

George H. Chan; Ming Ling Liu; Li Dong Chen; Fu Qiang Huang; Daniel E. Bugaris; Daniel M. Wells; John R. Ireland; Mark C. Hersam; Richard P. Van Duyne; James A. Ibers

Single crystal and bulk powder samples of the quaternary lanthanum copper oxysulfides La5Cu6.33O4S7 and La5Cu6O4S7 have been prepared by means of high-temperature sealed-tube reactions and spark plasma sintering, respectively. In the structure of La 5Cu6.33O4S7, Cu atoms tie together the fluorite-like (2)infinity[La5O4S(5+)] and antifluorite-like (2) infinity[Cu6S6(5-)] layers of La5Cu6O4S7. The optical band gap, E g, of 2.0 eV was deduced from both diffuse reflectance spectra on a bulk sample of La5Cu6O4S7 and for the (010) crystal face of a La 5Cu6.33O4S7 single crystal. Transport measurements at 298 K on a bulk sample of La 5Cu 6O 4S 7 indicated p-type metallic electrical conduction with sigma electrical =2.18 S cm(-1), whereas measurements on a La 5Cu6.33O4S7 single crystal led to sigma electrical =4.5 10(-3) S cm(-1) along [100] and to semiconducting behavior. In going from La 5Cu6O4S7 to La5Cu6.33O4S7, the disruption of the (2)infinity[Cu6S6(5-)] layer and the decrease in the overall Cu(2+)(3d(9)) concentration lead to a significant decrease in the electrical conductivity.


Inorganic Chemistry | 2003

The CsLnMSe3 semiconductors (Ln = rare-earth element, Y; M = Zn, Cd, Hg)

Kwasi Mitchell; Fu Qiang Huang; Adam D. McFarland; Christy L. Haynes; Rebecca C. Somers; Richard P. Van Duyne; James A. Ibers


Journal of Solid State Chemistry | 2007

Syntheses, crystal and electronic structure, and some optical and transport properties of LnCuOTe (Ln = La, Ce, Nd)

Min Ling Liu; Li Bin Wu; Fu Qiang Huang; Li Dong Chen; James A. Ibers


Journal of the American Chemical Society | 2000

Syntheses, Structures, Physical Properties, and Theoretical Study of LaCu0.40Te2, NdCu0.37Te2, SmCu0.34Te2, GdCu0.33Te2, and DyCu0.32Te2

Fu Qiang Huang; Paul Brazis; Carl R. Kannewurf; James A. Ibers


Inorganic Chemistry | 2004

Syntheses, structure, and selected physical properties of CsLnMnSe3 (Ln = Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Y) and AYbZnQ3 (A = Rb, Cs; Q = S, Se, Te)

Kwasi Mitchell; Fu Qiang Huang; Elad N. Caspi; Adam D. McFarland; Christy L. Haynes; Rebecca C. Somers; J. D. Jorgensen; Richard P. Van Duyne; James A. Ibers


Journal of Solid State Chemistry | 2005

Synthesis, structure, band gap, and electronic structure of CsAgSb4S7

Fu Qiang Huang; James A. Ibers


Journal of Solid State Chemistry | 2004

Syntheses, structure, and magnetic properties of several LnYbQ3 chalcogenides, Q=S, Se

Kwasi Mitchell; Rebecca C. Somers; Fu Qiang Huang; James A. Ibers

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Jiyong Yao

Chinese Academy of Sciences

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Bin Deng

Northwestern University

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Paul Brazis

Northwestern University

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Jianghua Yang

Chinese Academy of Sciences

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