Observation of a Polar Compound with Halide Ordering in the Compositional Series (CH3NH3)2Te(BrxCl1-x)6

Yuhan Liu; Prajna Bhatt; Roxy Lee; Avishek Dey; Anna Regoutz; Robin S. Perry; Robert G. Palgrave

doi:10.1021/acs.inorgchem.5c03380

Observation of a Polar Compound with Halide Ordering in the Compositional Series (CH₃NH₃)₂Te(Br_xCl_1-x)₆

Yuhan Liu
, Prajna Bhatt
, Roxy Lee
, Avishek Dey
, Anna Regoutz
, Robin S. Perry
, Robert G. Palgrave^*

^*Corresponding author for this work

University College London
University of Oxford

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Single-crystal samples of compounds in the series (CH₃NH₃)₂Te(Cl_1-xBrx)₆ were produced with counter-diffusion crystal growth in silica gels, and new crystal structures are determined using single-crystal X-ray diffraction. With increasing Br content, the structure transitions from P3̅m1 to P6₃mc to R3̅m and finally to Fm3̅m. The compound with x≈0.068 adopts the polar P6₃mc space group, and the structure has partially ordered Cl^- and Br^- ions. The crystals of this compound show distinct piezoelectric domains with different responses by Piezoresponse Force Microscopy (PFM), confirming their polar structure.

Original language	English
Journal	Inorganic Chemistry
Volume	64
Issue number	43
Pages (from-to)	21479-21488
Number of pages	10
ISSN	0020-1669
DOIs	https://doi.org/10.1021/acs.inorgchem.5c03380
Publication status	Published - 2025

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@article{901924b4ea6c44b09a54c776841c9614,

title = "Observation of a Polar Compound with Halide Ordering in the Compositional Series (CH3NH3)2Te(BrxCl1-x)6",

abstract = "Single-crystal samples of compounds in the series (CH3NH3)2Te(Cl1-xBrx)6 were produced with counter-diffusion crystal growth in silica gels, and new crystal structures are determined using single-crystal X-ray diffraction. With increasing Br content, the structure transitions from P3̅m1 to P63mc to R3̅m and finally to Fm3̅m. The compound with x≈0.068 adopts the polar P63mc space group, and the structure has partially ordered Cl- and Br- ions. The crystals of this compound show distinct piezoelectric domains with different responses by Piezoresponse Force Microscopy (PFM), confirming their polar structure.",

author = "Yuhan Liu and Prajna Bhatt and Roxy Lee and Avishek Dey and Anna Regoutz and Perry, \{Robin S.\} and Palgrave, \{Robert G.\}",

year = "2025",

doi = "10.1021/acs.inorgchem.5c03380",

language = "English",

volume = "64",

pages = "21479--21488",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "43",

}

TY - JOUR

T1 - Observation of a Polar Compound with Halide Ordering in the Compositional Series (CH3NH3)2Te(BrxCl1-x)6

AU - Liu, Yuhan

AU - Bhatt, Prajna

AU - Lee, Roxy

AU - Dey, Avishek

AU - Regoutz, Anna

AU - Perry, Robin S.

AU - Palgrave, Robert G.

PY - 2025

Y1 - 2025

N2 - Single-crystal samples of compounds in the series (CH3NH3)2Te(Cl1-xBrx)6 were produced with counter-diffusion crystal growth in silica gels, and new crystal structures are determined using single-crystal X-ray diffraction. With increasing Br content, the structure transitions from P3̅m1 to P63mc to R3̅m and finally to Fm3̅m. The compound with x≈0.068 adopts the polar P63mc space group, and the structure has partially ordered Cl- and Br- ions. The crystals of this compound show distinct piezoelectric domains with different responses by Piezoresponse Force Microscopy (PFM), confirming their polar structure.

AB - Single-crystal samples of compounds in the series (CH3NH3)2Te(Cl1-xBrx)6 were produced with counter-diffusion crystal growth in silica gels, and new crystal structures are determined using single-crystal X-ray diffraction. With increasing Br content, the structure transitions from P3̅m1 to P63mc to R3̅m and finally to Fm3̅m. The compound with x≈0.068 adopts the polar P63mc space group, and the structure has partially ordered Cl- and Br- ions. The crystals of this compound show distinct piezoelectric domains with different responses by Piezoresponse Force Microscopy (PFM), confirming their polar structure.

U2 - 10.1021/acs.inorgchem.5c03380

DO - 10.1021/acs.inorgchem.5c03380

M3 - Journal article

C2 - 41124142

SN - 0020-1669

VL - 64

SP - 21479

EP - 21488

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 43

ER -