Direct observation of the microstructure and defects in KBe2BO3F2 crystals by TEM

被引：2

作者：

Xu, Tao ^{[1
,2
]}

Liu, Lijuan ^{[1
]}

Wang, Xiaoyang ^{[1
]}

Chen, Chuangtian ^{[1
]}

Zhou, Haitao ^{[3
]}

He, Xiaoling ^{[3
]}

Zhang, Changlong ^{[3
]}

Sun, Junliang ^{[4
]}

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Funct Crystals & Laser Technol, Beijing Ctr Crystal Res & Dev, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

[3] China Nonferrous Met Guilin Geol & Min Co Ltd, Guilin 541004, Peoples R China

[4] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China

来源：

DALTON TRANSACTIONS | 2014年 / 43卷 / 43期

基金：

中国国家自然科学基金;

关键词：

HYDROTHERMAL GROWTH; GENERATION; LASER; FLUX;

D O I：

10.1039/c4dt02124j

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We apply for the first time transmission electron microscopy to the direct observation of the deep-UV nonlinear optical crystal KBe2BO3F2 (KBBF) grown using different methods. Two kinds of electron diffraction patterns were observed in the hydrothermally synthesized KBBF along the [120] direction, which resulted from the coexistence of two structures with space groups R32 and R (3) over barc. As a comparison, the flux grown KBBF crystals show uniform R32 structures. Furthermore we observed a twin boundary in flux KBBF which corresponds to the (2 (1) over tilde3)(R32) crystallographic plane. Two structure models are proposed here for the twin boundary. These observations on the microstructure and defects were not disclosed in previous powder XRD and optical microscopy experiments and shed new light on the understanding of the structure and defects of KBBF crystals.

引用

页码：16411 / 16415

页数：5

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