Preparation of Multicomponent Nitrides and their Crystal Chemstry

多元氮化物的制备及其晶体化学

• 批准号: 09650726
• 负责人: YAMANE Hisanori
• 金额: $ 2.05万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650726/
• 关键词: Nitrides; Na metal; Single Crystals; Crystal Structure Analysis; Sodium Azide; Powder X-Ray Diffraction; アルカリ金属アジ化物; アルカリ土類亜鉛窒化物; 窒化亜鉛基

Preparation of multi-component nitrides was attempted by using sodium azide (NaN3) as anitrogen source and sodium metal (Na) as a flux. Metal sources were sealed with NaN3 and Na in a stainless-steel tube container in which the inner wall was covered with a niobium sheet. This tube was placed in an electric furnace with argon gas and heated at 750ﾟC.After the heating, the tube was cooled to room temperature. The Na flux was washed with liquid ammonia. An H-shape cell was designed for this process. By using the present method, single crystals of strontium gallium nitride, Sr_3Ga_2N_4 were prepared. The crystals were below 1 mm in size, thin platelet, yellow, and transparent. X-ray single crystal structure analysis revealed that this compound has an orthorhombic symmetry (lattice parameters : alpha= 5.9579(12) , b = 10.285(2) , c = 9.557(2) A, space group P nna). Sr_3Ga_2N_4 is isostructural with Sr_3Al_2N_4 and Ba_3Ga_2N_4. Ga atoms were coordinated by four nitrogen atoms and form tetrahedra. The tetrahedra share two edges and make a one-dimensional chain. Strontium atoms are surrounded by six nitrogen atoms. Red color transparent single crystals were also obtained in the system of Ba-Ti-N, but not in the Sr-Ti N.Mixture of binary nitrides were obtained and multi-component nitrides could not be synthesized in the systems including rare-earth elements.

尝试使用叠氮化钠（NAN3）作为芳基源和金属钠（Na）作为通量，尝试了多组分氮化物的制备。金属源用Nan3和Na密封在一个不锈钢管容器中，其中内壁用niobium板覆盖。该管放在带有氩气的电炉中，并在750°C中加热。加热后，将管子冷却至室温。用液体氨洗涤Na通量。为此过程设计了H形单元。通过使用当前的方法，制备了氮化腹膜的单晶，制备了SR_3GA_2N_4。晶体的大小低于1毫米，血小板，黄色和透明。 X射线单晶体结构分析表明，该化合物具有正交对称性（晶格参数：alpha = 5.9579（12），B = 10.285（2），C = 9.557（2）A，空间组P NNA）。 sr_3ga_2n_4是ISOSTRUCTURAR，具有SR_3AL_2N_4和BA_3GA_2N_4。 GA原子由四个氮原子协调并形成四面体。四面体共享两个边缘，并建立了一维链。锶原子被六个氮原子包围。还在BA-TI-N系统中获得了红色透明的单晶，但在二元氮化物的Sr-Ti N.Mixture中未获得红色透明的单晶，并且无法在包括稀土元件在内的系统中合成多组分氮化物。

项目成果

Hisanori Yamane: "The Crystal Structure of Sr_6Cu_3N_5 with isolated,bent(Cu^1_2N_3)^<7-> anions and the single Crystal Structural Determination of SrCuN" J.Alloys Comp. 255. 122-129 (1997)

Hisanori Yamane：“具有孤立弯曲(Cu^1_2N_3)^<7->阴离子的Sr_6Cu_3N_5的晶体结构和SrCuN的单晶结构测定”J.Alloys Comp。