Based on the study of <sup>29</sup>Si,<sup>27</sup>Al NMR spectra for some orthoclases determined byX-ray powder diffraction method,Zhou et al.found that there are three maxima for the<sup&g...Based on the study of <sup>29</sup>Si,<sup>27</sup>Al NMR spectra for some orthoclases determined byX-ray powder diffraction method,Zhou et al.found that there are three maxima for the<sup>29</sup>Si NMR spectra of these orthoclases.In order to explain the three maxima the authorsexamined the <sup>29</sup>Si NMR spectrum and microstructure of Taiping orthoclase occurring ingranitic dyke.展开更多
Orthoclase is a kind of heterogeneous crystal in structure, which is constituted of domains with triclinic symmetry in the forms of submicroscopic twins or sub-X-ray twins. Although the average structure of orthodase ...Orthoclase is a kind of heterogeneous crystal in structure, which is constituted of domains with triclinic symmetry in the forms of submicroscopic twins or sub-X-ray twins. Although the average structure of orthodase given by X-my diffraction possesses C2/m symmetry, the true symmetry of domain itself is. Orthoclase is a metastable phase between sanidine and microcline, considering the ordering sequence of Al in the tetrahedral sites.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘Based on the study of <sup>29</sup>Si,<sup>27</sup>Al NMR spectra for some orthoclases determined byX-ray powder diffraction method,Zhou et al.found that there are three maxima for the<sup>29</sup>Si NMR spectra of these orthoclases.In order to explain the three maxima the authorsexamined the <sup>29</sup>Si NMR spectrum and microstructure of Taiping orthoclase occurring ingranitic dyke.
基金Project supported by the National Natural Science Foundation of China and the Laboratory of Solid State Microstructures of Nanjing University
文摘Orthoclase is a kind of heterogeneous crystal in structure, which is constituted of domains with triclinic symmetry in the forms of submicroscopic twins or sub-X-ray twins. Although the average structure of orthodase given by X-my diffraction possesses C2/m symmetry, the true symmetry of domain itself is. Orthoclase is a metastable phase between sanidine and microcline, considering the ordering sequence of Al in the tetrahedral sites.
