| Initial crystal system | unknown |
| Final crystal system | cubic |
| Initial space group | unknown |
| Final space group | cubic |
| Direction | both |
| Phase transition temperature | 178.0 (±5.0) K |
Hysteresis: NIL
Starting materials: HCl, CD3NH2, PbCl2
Product: CD3NH3PbCl3 crystals
Description: Primarily referenced the methods of [1] and [2]. The synthesis of MAPbBr3 in ref [2] was modified to prepare CD3NH3PbCl3.
Comment: Synthesis references: [1] Canadian Journal of Chemistry, 1987, 65(5): 1042-1046 https://doi.org/10.1139/v87-176 [2] D. WEBER. Z. Naturforsch. 33b, 1443 (1978).
Method: 2H and 14N NMR
Description: Measurements were carried out at 8.48 T with a Nicolet 360NB spectrometer using a broad band (16-58 MHz) variable-temperature 10 mm probe supplied by Nicolet. The 2-H and 14-N frequencies were 55.427 and 26.083 MHz, respectively. Refer to Page 414 Results section Existence of transitions subsection.
| Initial crystal system | unknown |
| Final crystal system | unknown |
| Initial space group | unknown |
| Final space group | unknown |
| Direction | both |
| Phase transition temperature | 171.49 (±0.02) K |
Hysteresis: NIL
| Initial crystal system | unknown |
| Final crystal system | cubic |
| Initial space group | unknown |
| Final space group | Pm3m |
| Direction | both |
| Phase transition temperature | 177.36 (±0.03) K |
Hysteresis: NIL
Starting materials: HCl, CH3NH2, PbCl2
Product: MAPbCl3 Single-crystal
Description: Primarily referenced the methods of [1] and [2]. The synthesis of MAPbBr3 in ref [2] was modified to prepare MAPbCl3.
Comment: Synthesis references: [1] Canadian Journal of Chemistry, 1987, 65(5): 1042-1046 https://doi.org/10.1139/v87-176 [2] D. WEBER. Z. Naturforsch. 33b, 1443 (1978).
Method: Adiabatic calorimetry
Description: The heat capacities were measured in an adiabatic calorimeter from 30 to 345 K, using sample masses of 14.6883 g MAPbCl3. Refer to Page 414 Table 1.
| Initial crystal system | unknown |
| Final crystal system | unknown |
| Initial space group | unknown |
| Final space group | unknown |
| Direction | both |
| Phase transition temperature | 175.0 K |
Hysteresis: NIL
Starting materials: Not specified
Product: MAPbCl3 single crystals
Description: The procedure mentioned in ref [1] for MAPbBr3 was modified. A D2O-H2O mixture was used to prepare the N-deuterated samples.
Comment: Synthesis references: [1] D. Weber, Z. Naturforsch. 33b, 1443 (1978).
Method: 2H and 14N NMR
Description: 2H and 14N NMR spectra were recorded at 55.4257 and 26.083 MHz, respectively, on a Nicolet 360 NB spectrometer (B0 = 8.48 T). Refer to Page 581.
| Initial crystal system | orthorhombic |
| Final crystal system | tetragonal |
| Initial space group | P222_1 |
| Final space group | P4mm |
| Direction | Unknown |
| Phase transition temperature | 171.5 K |
Hysteresis: NIL
| Initial crystal system | tetragonal |
| Final crystal system | cubic |
| Initial space group | P4mm |
| Final space group | Pm3m |
| Direction | Unknown |
| Phase transition temperature | 177.2 K |
Hysteresis: NIL
Starting materials: Pb(CH3CO2)2, MACl
Product: Colorless MAPbCl3 cube-shaped crystals of 1-2 mm from the edge
Description: Add aqueous solution of Pb(CH3CO2)2 drop by drop to an excess quantity of hot aqueous MACl solution and cool slowly to 5 °C.
Method: Adiabatic calorimetry
Description: The heat capacities were measured with a computerized adiabatic calorimeter [1, 2]. The temperature ranges of the measurement were between 13 and 300 K. The mass of the calorimetric sample was 6.0483 g.
Comment: References: [1] Tatsumi M., Matsuo T., Suga H. and Seki S., Bull. chem. Soc. Jap. 48, 3060 (1975). [2] Matsuo T. and Suga H., Thermochim. Acta 88, 149 (1985).
| Initial crystal system | orthorhombic |
| Final crystal system | tetragonal |
| Initial space group | P222_1 |
| Final space group | P4/mmm |
| Direction | Unknown |
| Phase transition temperature | 172.9 K |
Hysteresis: NIL
| Initial crystal system | tetragonal |
| Final crystal system | cubic |
| Initial space group | P4/mmm |
| Final space group | Pm3m |
| Direction | Unknown |
| Phase transition temperature | 178.8 K |
Hysteresis: NIL
Starting materials: lead (II) acetate, CH3NH3+ (by adding a 40% solution of CH3NH2 in water), concentrated HCl
Product: Colorless MAPbCl3 crystals
Description: CH3NH3PbCI3 was synthesized from lead (II) acetate and CH3NH3+ dissolved in concentrated HCl solution. The aqueous solution was cooled from l00°C to room temperature to obtain the colorless crystals.
Method: Temperature-dependent Guinier-Simon photograph
Description: No method specified. Refer to Page 6374 Table I.