See all entries for this property (5 total)
Crystal system: cubic
| a: | 6.362 (±0.0008) Å |
| b: | 6.362 (±0.0008) Å |
| c: | 6.362 (±0.0008) Å |
| α: | 90° |
| β: | 90° |
| γ: | 90° |
Starting materials: Lead acetate trihydrate, HI, H3PO2, formamidinium acetate
Product: FAPbI3 Crystals (alpha phase)
Description: 6.000g of lead acetate trihydrate added to flask with reflux condenser containing 12.4mL HI and 3.1 mL H3PO2. Then, 1.647g of formamidinium acetate was heated with solution to 100°C and left to cool, forming crystals. Crystals were then filtered and washed with dry diethyl ether and heated to 130°C for two hours.
Method: Powder X-ray diffraction (PXRD)
Description: Patterns collected on Siemens / Bruker D5000 diffractometer using Cu Ka radiation (λ = 0.15418 nm).
Comment: This compound was assigned the trigonal space group P3m1 in the original publication (doi: 10.1021/ic401215x) and this assignment is therefore retained here. However, the literature consensus for the alpha phase of formamidinium, including a later report by some of the same authors (https://doi.org/10.1002/anie.201609538), is that the compound crystallizes in the cubic space group Pm-3m. Those later reports are considered more accurate.