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Figure 2
Stacking of α and β modules for the construction of …β(αβ)α… apatite-2H, A10(BO4)6X2 (a) and the hypothetical structure …α(α)α… apatite-1H, A5(B3O9)X (b) polysome end-members. The coincident lattice where condensation and elimination of oxygen takes place is emphasized by brackets. For clarity the AT and X ions are not included.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 66| Part 1| February 2010| Pages 1-16
https://doi.org/10.1107/S0108768109053981
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