TY - JOUR
T1 - Synthesis and crystal structure of a new quaternary thioantimonate, Na9Gd5Sb8S26
AU - Park, Sunju
AU - Kim, Sung Jin
N1 - Funding Information:
The authors express their thanks to Prof. Y. B. Park for permitting the use of the Shimadzu UV-3101PC spectrophotometer. This work is supported by Grant 2000-1-12200-002-3 from the Basic Research Program of the Korean Science & Engineering Foundation.
PY - 2001
Y1 - 2001
N2 - The first Na-containing quaternary rare-earth thioantimonate, Na9Gd5Sb8S26, was synthesized from the reaction of Gd metal, Sb, and S in Na2S flux at 750°C. Black plate-shaped crystals were obtained and their crystal structure was determined by the single-crystal X-ray diffraction method. This compound crystallizes in the orthorhombic space group Pnma (No. 62) with a unit cell of a = 11.406(3) Å, b = 23.765(2) Å, c = 16.923(5) Å, and Z = 4. Na9Gd5Sb8S26 has a complex three-dimensional structure that consists of SbS3, SbS4, GdS6, and GdS7 units. In the structure, three crystallographically different Gd atoms form a staircase-shaped building block, where two Gd atoms share disulfide ions, S22-. The formula of the compound can be described as (Na+)9(Gd3+)5(Sb3+) 8(S2-)22(S22-) 2. Measurement of the optically diffuse reflectance indicates that Na9Gd5Sb8S26 is a semiconductor with a band gap of 1.63 eV.
AB - The first Na-containing quaternary rare-earth thioantimonate, Na9Gd5Sb8S26, was synthesized from the reaction of Gd metal, Sb, and S in Na2S flux at 750°C. Black plate-shaped crystals were obtained and their crystal structure was determined by the single-crystal X-ray diffraction method. This compound crystallizes in the orthorhombic space group Pnma (No. 62) with a unit cell of a = 11.406(3) Å, b = 23.765(2) Å, c = 16.923(5) Å, and Z = 4. Na9Gd5Sb8S26 has a complex three-dimensional structure that consists of SbS3, SbS4, GdS6, and GdS7 units. In the structure, three crystallographically different Gd atoms form a staircase-shaped building block, where two Gd atoms share disulfide ions, S22-. The formula of the compound can be described as (Na+)9(Gd3+)5(Sb3+) 8(S2-)22(S22-) 2. Measurement of the optically diffuse reflectance indicates that Na9Gd5Sb8S26 is a semiconductor with a band gap of 1.63 eV.
KW - Band gap
KW - Crystal structure
KW - Disulfide ion
KW - NaGdSbS
KW - Thioantimonate
UR - http://www.scopus.com/inward/record.url?scp=0034765825&partnerID=8YFLogxK
U2 - 10.1006/jssc.2001.9299
DO - 10.1006/jssc.2001.9299
M3 - Article
AN - SCOPUS:0034765825
SN - 0022-4596
VL - 161
SP - 129
EP - 134
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 1
ER -