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Figure 2 . Drawings of the structure featuring alternate stacking of the dreier and sechser ring layers. The Si1—Si10 tetra­hedra in the dreier ring layer are colored in dark blue, while the edge-sharing Si(Al)11-14 and Si(Al)l15-18 tetra­hedra in the sechser ring layer are colored in pale blue and green, respectively. Sr (red) are located in the larger channels formed in the Si—Al—O—N skeleton.

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ISSN: 2056-9890
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