 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 1]](dk5077fig1mag.jpg)
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Figure 1
Schematic overview of the pressure-induced transformation of MAPbI3 at room temperature. Top panel: influence of the PTM on the transformation. The thickness of the red and black lines represents schematically the relative content of the (pseudo) cubic and amorphous phases shown, respectively, in the bottom panel. Bottom panel: relations between the unit cells of different phases. Unit-cell parameters: apr ≃ 6.4 Å for the primitive perovskite cubic cell (green line); a = b ≃ apr ![[\sqrt 2]](teximages/dk5077fi4.gif) ≃ 8.8 Å and c ≃ 2apr ≃ 12.7 Å for the tetragonal body-centred cell (blue) under ambient condition; a ≃ b ≃ c ≃ 2apr ≃ 12.3 Å for the body-centred (pseudo)cubic cell (red) under high pressure. The data are taken from: Capitani et al. (2016 ) and Jaffe et al. (2016) for He; Ou et al. (2016) and Jiang et al. (2016) for no PTM (None); Jiang et al. (2016) for silicon oil (Si-oil); Wang et al. (2015) for non-specified PTM (Unknown); Szafrański & Katrusiak (2016) for propanol. Data corresponding to Ar and Ne (yellow background) are from the present work. |
![[Figure 1]](dk5077fig1.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
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