Structural chemistry of layered lead halide perovskites containing single octahedral layers.

For the A Pb X 4 types templated by linear di­amines [H 3 NC n H 2 n NH 3 ] 2+ , early work (Lemmerer & Billing, 2012 a ▸ ) showed a trend whereby the parity of the carbon number ( i.e. n = odd or even) dictated the tilt system of the inorganic layers with compositions of n = 8, 10 and 12 adopting the a − a − c system.

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