نتایج جستجو برای: sodalite
تعداد نتایج: 304 فیلتر نتایج به سال:
A new host-guest hybrid system with MnS clusters confined in a chalcogenide-based semiconductor zeolite was for the first time constructed and its photoluminescence (PL) properties were also investigated. The existence of MnS clusters in the nanopores of the semiconductor zeolite was revealed by UV-Vis absorption spectroscopy, steady-state fluorescence analysis, Raman as well as Fourier transfo...
Grossular is a secondary mineral commonly observed in Al-lende CAIs associated with monticellite, wollastonite, forsterite, anorthite, and wadalite [1–6]. Studies of the 26 Al– 26 Mg systemat-ics in grossular yield (26 Al/ 27 Al) 0 ranging from ~5×10 –5 to <3×10 –6 suggesting grossular formation started almost contempo-raneously with crystallization of CAIs and lasted > 3 My [1–3]. This interpr...
I n t r o d u c t i o n THE structures of the cancrinite-group minerals are character ized by parallel s ix-membered rings consisting of alternating A104 and SiO4 tetrahedra. The hexagonal symmetry is the result of the stacking of such six-membered rings in an AB... sequence. This stacking leads to large continuous channels that are formed by twelve-membered rings of alternating A1Oa and SiO4 t...
Ba20Hg103, the next Hg-rich binary barium mercuride after BaHg11 and BaHg6, was synthesized from melts of the elements, which were slowly cooled from 550 to 200 ◦C. It forms a new complex cubic structure type (F4̄3m, a = 2333.30(10) pm, Z = 4, R1 = 0.0651) with four Ba und 13 Hg positions as determined by means of single-crystal X-ray diffraction. The structure can be best described by decomposi...
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