Giovanna Vezzalini, Simona Quartieri, Ermanno Galli, Alberto Alberti, Giuseppe Cruciani, Ake Kvick
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引用次数: 55
摘要
我们描述了最近在Adamson山(南极洲北维多利亚地)发现的高硅沸石mutinaite的晶体结构。Mutinaite是合成沸石ZSM-5的天然对应物。新矿物(Na2.76K0.11Mg0.21Ca3.78) (Al11.20Si84.91)·60 H2O H2O为正交晶系，空间群为Pnma, a = 20.201(2)， b = 19.991(2)， c = 13.469(2) Å。在同步辐射源ESRF(格勒诺布尔)上进行了单晶x射线衍射实验。在框架中没有检测到Si-Al的顺序。通道中的离子与框架氧之间的距离较大，表明框架和框架外物种之间的相互作用较弱。
Crystal structure of the zeolite mutinaite, the natural analog of ZSM-5
We describe the crystal structure of the high-silica zeolite mutinaite, recently found at Mt. Adamson (Northern Victoria Land, Antarctica). Mutinaite is the natural counterpart of the synthetic zeolite ZSM-5. The new mineral, (Na2.76K0.11Mg0.21Ca3.78) (Al11.20Si84.91) · 6O H2O H2O, is orthorhombic, space group Pnma, with a = 20.201(2), b = 19.991(2), and c = 13.469(2) Å. A single-crystal X-ray diffraction experiment was performed at the synchrotron radiation source ESRF (Grenoble). No Si-Al order in the framework has been detected. Large distances between ions in the channels and framework oxygens suggest weak interactions between the framework and extraframework species.
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