Methylammonium lead bromide: phase transition temperature

Phase transition temperature Verified
Origin: experimental
Phase transition #1 - III to II
Initial crystal system unknown
Final crystal system unknown
Initial space group unknown
Final space group unknown
Direction both
Phase transition temperature 150.0 K

Hysteresis: NIL

R. Wasylishen, O. Knop, and J. Macdonald, CATION ROTATION IN METHYLAMMONIUM LEAD HALIDES, Solid State Communications 56, 581‑582 (1985). doi: 10.1016/0038-1098(85)90959-7.
Phase transition #2 - II to I
Initial crystal system unknown
Final crystal system unknown
Initial space group unknown
Final space group unknown
Direction both
Phase transition temperature 233.0 K

Hysteresis: NIL

R. Wasylishen, O. Knop, and J. Macdonald, CATION ROTATION IN METHYLAMMONIUM LEAD HALIDES, Solid State Communications 56, 581‑582 (1985). doi: 10.1016/0038-1098(85)90959-7.
System description
Dimensionality: 3D
Sample type: single crystal
Related data
This data set is directly linked to other data sets: See all related data

Starting materials: HBr, CH3NH2, Pb(NO3)2

Product: N-deuterated MAPbBr3 single crystals

Description: Add concentrated HBr to neutralize 20 g of 40% CH3NH2 aqueous solution (D2O-H2O mixture). Add 7.1 g (0.021 mol) of Pb(NO3)2 solution drop-wise under vigorous stirring at 100°C to the concentrated CH3NH3Br solution. Red organic crystals form while dripping in the solution. Cool the solution to room temperature and filter out the crystals. Wash crystals firstly with n-butanol and then with benzene; subsequently dry crystals in vacuum.

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.

R. Wasylishen, O. Knop, and J. Macdonald, CATION ROTATION IN METHYLAMMONIUM LEAD HALIDES, Solid State Communications 56, 581‑582 (1985). doi: 10.1016/0038-1098(85)90959-7.

Extraction method: Manual entry
Entry added on: June 9, 2019, 5:43 p.m.
Entry added by: Xiaochen Du Duke University
Last updated on: March 29, 2022, 6:08 p.m.
Last updated by: Rayan C Duke University
Data correctness verified by:
  • Rayan C Duke University

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