| Initial crystal system | orthorhombic |
| Final crystal system | tetragonal |
| Initial space group | Pna2_1 |
| Final space group | P4mm |
| Direction | Unknown |
| Phase transition temperature | 148.8 K |
Hysteresis: NIL
| Initial crystal system | tetragonal |
| Final crystal system | tetragonal |
| Initial space group | P4mm |
| Final space group | I4/mcm |
| Direction | Unknown |
| Phase transition temperature | 154.0 K |
Hysteresis: NIL
| Initial crystal system | tetragonal |
| Final crystal system | cubic |
| Initial space group | I4/mcm |
| Final space group | Pm3m |
| Direction | Unknown |
| Phase transition temperature | 236.3 K |
Hysteresis: NIL
Starting materials: Pb(CH3CO2)2, MABr
Product: Orange MAPbBr3 cube-shaped crystals of 1-2 mm
Description: Add aqueous solution of Pb(CH3CO2)2 drop by drop to an excess quantity of hot aqueous MABr 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 8.8810 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).