TY - JOUR
T1 - X-ray diffraction study of K3NdSi7O17
T2 - A new framework silicate with a linear Si-O-Si bond
AU - Haile, S. M.
AU - Wuensch, B. J.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2000/10
Y1 - 2000/10
N2 - Hydrothermal investigations in the high-silica region of the K2O-Nd2O3-SiO2 system, carried out in a search for novel fast-ion conductors (FICs), yielded the new compound tripotassium neodymium heptasilicate, K3NdSi7O17. Single-crystal X-ray methods revealed that K3NdSi7O17 crystallizes in space group P3, has lattice constants a = 16.131 (2) and c = 7.7146 (19) Å, Z = 4, and 22 atoms in the asymmetric unit. Refinement was carried out to a residual. R(F), of 0.0253 and a weighted residual, wR(F2), of 0.0702 using anisotropic displacement parameters for all atoms. The silicate anion forms an interrupted framework, within which both Nd octahedra and K polyhedra are situated. The structure is unusual in that it contains a symmetry-constrained Si-O-Si bond angle of 180°. No isomorphs to K3NdSi7O17 are known.
AB - Hydrothermal investigations in the high-silica region of the K2O-Nd2O3-SiO2 system, carried out in a search for novel fast-ion conductors (FICs), yielded the new compound tripotassium neodymium heptasilicate, K3NdSi7O17. Single-crystal X-ray methods revealed that K3NdSi7O17 crystallizes in space group P3, has lattice constants a = 16.131 (2) and c = 7.7146 (19) Å, Z = 4, and 22 atoms in the asymmetric unit. Refinement was carried out to a residual. R(F), of 0.0253 and a weighted residual, wR(F2), of 0.0702 using anisotropic displacement parameters for all atoms. The silicate anion forms an interrupted framework, within which both Nd octahedra and K polyhedra are situated. The structure is unusual in that it contains a symmetry-constrained Si-O-Si bond angle of 180°. No isomorphs to K3NdSi7O17 are known.
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U2 - 10.1107/S0108768100006704
DO - 10.1107/S0108768100006704
M3 - Article
C2 - 11006552
AN - SCOPUS:0011881299
VL - 56
SP - 773
EP - 779
JO - Acta Crystallographica Section B: Structural Science
JF - Acta Crystallographica Section B: Structural Science
SN - 0108-7681
IS - 5
ER -