Top-Seeded Solution Growth, Morphology, and Properties of a Polar Crystal Cs2TeMo3O12
Top-Seeded Solution Growth, Morphology, and Properties of a Polar Crystal Cs2TeMo3O12
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DOI：
10.1021/cg200050g
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发表时间：
2011-04
影响因子：
3.8
通讯作者：
Junjie Zhang;X. Tao;Youxuan Sun;Zhonghan Zhang;Chengqian Zhang;Zeliang Gao;Haibing Xia;S. Xia
中科院分区：
文献类型：
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作者：
Junjie Zhang;X. Tao;Youxuan Sun;Zhonghan Zhang;Chengqian Zhang;Zeliang Gao;Haibing Xia;S. Xia
采用顶部籽晶溶液生长法（TSSG），以TeO 2 − MoO 3混合物为自助熔剂，成功生长出尺寸达20 × 20 × 16 mm 3的极性六方氧化钨（HTO）材料Cs2 TeMo 3 O 12单晶。从低浓度溶液中生长的Cs2 TeMo 3 O 12晶体具有{0002}、{1010}和{1011}晶面，这与基于Bravais-Friedel和Donnay-Harker（BFDH）方法预测的生长形貌很好地一致。然而，从具有高浓度的溶液中生长的晶体显示出额外的{1012}晶面，这是没有预测到的。与使用[2110]取向晶种生长的晶体相比，使用[0001]取向晶种生长的晶体具有更规则的形状。Cs_2TeMo_3O_（12）晶体属极性六方空间群P63（no.173）。高分辨X射线衍射结果表明，摇摆曲线的半高宽为18.96′′。热分析和粉末X射线衍射演示
Single crystals of the polar hexagonal tungsten oxide (HTO) material Cs2TeMo3O12 with dimensions up to 20 × 20 × 16 mm3 were grown successfully through a top-seeded solution growth (TSSG) method using a TeO2−MoO3 mixture as a self-flux. The Cs2TeMo3O12 crystals grown from a solution with a low concentration exhibit {0002}, {1010}, and {1011} facets, which are in good accordance with the predicted growth morphology based upon the Bravais−Friedel and Donnay−Harker (BFDH) methods. However, the crystals grown from solution with a high concentration show additional {1012} facets, which are not predicted. Crystals grown by using the [0001]-oriented seed have more regular shapes as compared with those grown by using the [2110]-oriented seed. Cs2TeMo3O12 crystallizes in the polar hexagonal space group P63 (no. 173). The result of the high-resolution X-ray diffraction indicates that the full-width at half-maximum (fwhm) of the rocking curve is 18.96′′. Thermal analysis and powder X-ray diffraction demonstra...