TY - JOUR
T1 - Group 10 and Group 12 One-Dimensional Selenodiphosphates:A2MP2Se6(A=K, Rb, Cs;M=Pd, Zn, Cd, Hg)
AU - Chondroudis, Konstantinos
AU - Kanatzidis, Mercouri G.
N1 - Funding Information:
Financial support from the National Science Foundation (Grant DMR-9527347) is gratefully acknowledged. M.G.K. is a Camille and Henry Dreyfus Teacher—Scholar (1993—1998). This work made use of the SEM facilities of the Center for Electron Optics at Michigan State University.
PY - 1998/7
Y1 - 1998/7
N2 - The reaction ofM(M=Pd, Zn, Cd, Hg) with a molten mixture ofA2Se/P2Se5/Se produced the quaternary compoundsA2MP2Se6(A=K, Rb, Cs;M=Pd, Zn, Cd, Hg). The crystals ofA2MP2Se6are air- and water-stable. For Cs2PdP2Se6(1): monoclinicC2/c (No. 15) witha=12.9750(4) Å,b=8.3282(2) Å,c=13.0568(1) Å,β=102.940(2)°,Z=4, andR/Rw=6.7/7.5%. K2ZnP2Se6(2), K2CdP2Se6(3), Rb2CdP2Se6(4), and Cs2CdP2Se6(5) are isostructural. Rb2CdP2Se6(4): monoclinicP21/n(No. 14) witha=6.640(1) Å,b=12.729(2) Å,c=7.778(1) Å,β=98.24(1)°,Z=2, andR/Rw=3.7/4.9%. K2HgP2Se6(6) and Rb2HgP2Se6(7), are isostructural. K2HgP2Se6(6): monoclinicP21/c(No. 14) witha=13.031(2) Å,b=7.308(2) Å,c=14.167(2) Å,β=110.63(1)°,Z=4, andR/Rw=5.6/7.1%. Compounds 1-7 contain the ethane-like [P2Se6]4-group. Compound 1 has a one-dimensional structure with Pd2+in square-planar coordination. Compounds 2-5 also have one-dimensional structures related to the TiI3structure type. TheM2+ions and the P-P pairs reside in Se octahedra that share opposite faces in the chain direction. Compounds 6 and 7 have a related one-dimensional structure but with Hg2+in tetrahedral coordination. The solid state single-crystal optical absorption and far-IR spectra of the compounds are reported. Compounds 2-7 melt congruently in the 540-773°C region, whereas 1 melts incongruently.
AB - The reaction ofM(M=Pd, Zn, Cd, Hg) with a molten mixture ofA2Se/P2Se5/Se produced the quaternary compoundsA2MP2Se6(A=K, Rb, Cs;M=Pd, Zn, Cd, Hg). The crystals ofA2MP2Se6are air- and water-stable. For Cs2PdP2Se6(1): monoclinicC2/c (No. 15) witha=12.9750(4) Å,b=8.3282(2) Å,c=13.0568(1) Å,β=102.940(2)°,Z=4, andR/Rw=6.7/7.5%. K2ZnP2Se6(2), K2CdP2Se6(3), Rb2CdP2Se6(4), and Cs2CdP2Se6(5) are isostructural. Rb2CdP2Se6(4): monoclinicP21/n(No. 14) witha=6.640(1) Å,b=12.729(2) Å,c=7.778(1) Å,β=98.24(1)°,Z=2, andR/Rw=3.7/4.9%. K2HgP2Se6(6) and Rb2HgP2Se6(7), are isostructural. K2HgP2Se6(6): monoclinicP21/c(No. 14) witha=13.031(2) Å,b=7.308(2) Å,c=14.167(2) Å,β=110.63(1)°,Z=4, andR/Rw=5.6/7.1%. Compounds 1-7 contain the ethane-like [P2Se6]4-group. Compound 1 has a one-dimensional structure with Pd2+in square-planar coordination. Compounds 2-5 also have one-dimensional structures related to the TiI3structure type. TheM2+ions and the P-P pairs reside in Se octahedra that share opposite faces in the chain direction. Compounds 6 and 7 have a related one-dimensional structure but with Hg2+in tetrahedral coordination. The solid state single-crystal optical absorption and far-IR spectra of the compounds are reported. Compounds 2-7 melt congruently in the 540-773°C region, whereas 1 melts incongruently.
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U2 - 10.1006/jssc.1998.7791
DO - 10.1006/jssc.1998.7791
M3 - Article
AN - SCOPUS:0002777432
SN - 0022-4596
VL - 138
SP - 321
EP - 328
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 2
ER -