四方晶系

（Gd，Ba，Fe）多元四方晶系草酸盐的生成过程和热分解

Process of formation and thermal decomposion of tetragonal structure oxalate

利用X-ray衍射仪进行物相分析，证明产品为四方晶系锐钛矿结构，用TEM观察样品形貌为无序介孔材料，可以很清楚地看到蠕虫状的无序孔道。

The structure of the synthesized product was discussed by XRD analysis ; proved that the products belong to the Department of tetragonal anatase structure . TEM observation of samples used for the disordered morphology of mesoporous materials , can clearly see that the vermiculate ostium .

X射线粉末衍射实验确定所获BaWO4晶体的结构属于四方晶系，空间群I41/a。通过浮力法测得其密度为6.393g/cm3。

The cell parameters of BaWO_4 crystal were measured by X-ray powder diffraction .

四方晶系Patterson法多解的一般形式

The general types of multiple solution in Patterson method for tetragonal system

XRD相分析表明，电沉积Sn-Bi钎料主要由四方晶系的Sn相和菱形晶系Bi相组成。

The XRD phase analysis shows that the electrodeposited Sn-Bi solder mainly consists of the tetragonal tin and the rhombohedral bismuth phases .

四方晶系SBN晶体中位错光双折射像的理论计算和实验观察

Theoretical calculation and experimental observation of birefringence images of dislocation in SBN crystals

主催化剂TiO2呈四方晶系锐钛矿型，粒度小于10nm；

The main catalyst is α - TiO_ ( 2 ) , and the size is less than 10nm ;

通过XRD分析，验证了晶体属于四方晶系、I41/a空间群，并计算了晶胞参数。

The crystals belong to tetragonal system with I4I / a space group by XRD analysis , which has a structure of scheelite . The cell parameters of crystal were calculated .

CaF2的存在使C4A3S矿物晶体主要以四方晶系的结构形式存在；

Addition of CaF 2 will result in the crystal of C 4A 3S existing in tetragonal structure mainly .

在模扳的背面喷金作为催化剂，660C的温度下生长的Ge纳米线是一种多晶结构，同时包含四方晶系和立方晶系，但以四方晶系为主。

The gold film deposited on the backside of the alumina template was used as catalyst . And the Ge nanowires growing at 660 ℃ were polycrystal composed of tetragonal structure and cubic structure with the dominance of tetragonal structure .

晶体属四方晶系，空间群为I41cd。

It was found that the crystal belongs to the monoclinic system with space group ⅰ _4_1cd .

运用XRD分析氟掺杂二氧化锡导电玻璃导电面SnO2的晶型，发现其属于四方晶系，晶粒尺寸为32.35nm。

The phase of SnO__2 on F-doped SnO_2 conducting glass was characterized by X-Ray diffraction technique ( XRD ), and the results show that the phases of SnO_2 belong to the tetragonal system and its average diameter is 32.35 nm .

标定六角晶系及四方晶系粉末照相指数的解析计算方法及计算程序

The algorism and computer program for indexing hexagonal and tetragonal Debye-Scherrer photographs

采用LCRMETER4225型仪器测量其电性能，测得的介电性能在测试温度范围内具有弥散性相变的特性，这与四方晶系的晶体结构是相符的。

Their dielectric properties are in accordance with those of the crystal in tetragonal structure . ( 5 refs . )

本程序能对立方晶系、四方晶系、正交晶系晶体的电子衍射进行自动检索。

This paper deals with the autoindexing programming for the electron-diffraction of cubic system , tetragonal system and orthorhombic system .

结果表明：在240~300℃的水热条件下，反应2~8h，可制得结晶良好、分散性好、粒度在3~15nm、具有四方晶系金红石结构的锑掺杂氧化锡球形颗粒；

As indicated by results , antimony doped tin dioxide spherical particles with tetragonal phases rutile , which are well-crystallized , well-degree of dispersion and the particle size is 3 ~ 15 nm , are prepared at 240 ~ 300 ℃, 2 ~ 8 h.