K0.72Na1.71Ca5.79Si6O19 – the first oligosilicate based on [Si6O19]-hexamers and its stability compared to cyclo­silicates

Kahlenberg, V.; Krüger, H.; Garber, S.; Krüger, B.; Libowitzky, E.; Kröll, S.; Hofer, T.S.; Gallmetzer, J.M.; Purtscher, F.R.S.

doi:10.1107/S2052520624007352

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 4
The non-tetrahedral cation positions M2–M7 occupy the corners (M3), the edge centres (M2, M4, M6) as well as the face centres (M5, M7) of pseudocubic modules (tetragonal prisms). The cations are potassium (violet), sodium (yellow) and calcium (light blue). The sizes of the bi-coloured segments indicate the percentages determined from the site-occupancy refinements. Note that M7 is only partially occupied.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 80| Part 5| October 2024| Pages 474-487

https://doi.org/10.1107/S2052520624007352

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