Rb2Ca2Si2O7: a new alkali alkaline-earth silicate based on [Si2O7]6− anions

Kahlenberg, V.

doi:10.1107/S2053229625001196

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 6
Structural differences within a 6.5 Å wide slab containing a sequence of four rods between (a) the aristotype, view along [120] (P6₃/mmc, a = 5.6065 and c = 13.6420 Å), (b) K₂Ca₂Si₂O₇, view along [110] (P6₃/m, a = 9.8020 and c = 13.8781 Å), (c) Rb₂Ca₂Si₂O₇, view along [001] (Pmmn, a = 5.7363, b = 13.8532 and c = 9.9330 Å), and (d) Na₃ScSi₂O₇, view along [1 $[\overline 1]$ 0] (Pbnm, a = 5.3540, b = 9.3470 and c = 13.0890 Å). Different colours simply highlight the various coordination polyhedra, but do not provide any information about their occupation with different cation species.

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 81| Part 3| March 2025|

https://doi.org/10.1107/S2053229625001196

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