The concept of effective (non-integer) coordination number is useful to describe distorted structures. Structures of silicates are governed by silica chains accommodating to large cations.doi:10.1007/978-94-007-4771-5_5Batsanov, Stepan S.
Crystal structure formation of silicates in accordance with the mechanism of matrix assembly 来自 Semantic Scholar 喜欢 0 阅读量: 11 作者:GD Ilyushin,LN Demianets 摘要: This is a review over the state of art in self-organization in crystal-forming systems where a long-range order appears ...
Knowledge of the crystal structures of both anhydrous and hydrated compounds is briefly reviewed, and the problem of relating crystallographic and chemical results is discussed. One approach lies in the study of oriented transformations, i.e., reactions in which the structure of a crystalline ...
Some Ordering of Iron and Magnesium at the Octahedrally Coordinated Sites in a Magnesium-rich Olivine FERROUS ions in crystal structures of silicates frequently prefer octahedrally coordinated sites with a distinct local distortion. Typical examples are fou... WR Bush,SS Hafner,D Virgo - 《Nature》...
钙钛矿型结构Perovskite-typestructure 硅酸盐结构Structureofsilicates 链状结构Chainstructure 架状结构Frameworkstructure 叶蜡石pyrophyllite 石英quartz 美橄榄石forsterite 各向异性的anisotropy 晶格参数latticeparameters 非结晶的noncrystalline 多晶形polymorphism 单晶singlecrystal 电位electronstates 电子electrons 金属键metallicbond...
Crystal Structure (redirected fromCrystal structures) Medical The arrangement of atoms, ions, or molecules in a crystal. Crystals are solids having, in all three dimensions of space, a regular repeating internal unit of structure. Crystals have been studied using x-rays, which excite signals from...
In this work, we undertook high-precision, single-crystal structure determinations of amblygonite up to ~34 GPa in situ using synchrotron-based single-crystal X-ray diffraction and theoretical calculations. High-pressure vibrational properties of amblygonite were also determined by Raman spectroscopy. ...
FROM STRUCTURE TOPOLOGY TO CHEMICAL COMPOSITION. II. TITANIUM SILICATES: REVISION OF THE CRYSTAL STRUCTURE AND CHEMICAL FORMULA OF DELINDEITE The crystal structure of delindeite, ideally Ba2 Na2 Ti3 (Si2O7)2 O2 (OH)2 (H2O)2, a 10.6452(9), b 13.713(1), c 21.600(2) ?, β 93.804(3...
The crystal structure of δ-Na2Si2O5 has been solved and refined to an R index of 0.053 for 933 independent reflections. The compound is monoclinic with space group P21/n (a=8.393(2) , b=12.083(3) , c=4.843(1) , β=90.37(3)°, V=491.1(1) 3, Mr=182.15 u, Z=4, λ(MoKα...
The goal is to provide a correct structure solution and a high level of precision for the refined data. Modern technology can allow very precise data, indeed. Much of the quality of the data hinges on the quality of the crystal. A small, ground sphere has many advantages, as correction fo...