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TiO_2 is a very important wide bandgap semiconductor, which mainly include three crystal structures. Anatase and rutile are tetragonal. Brookite is orthorhombic.
TiO_2是一种重要的宽禁带半导体材料，主要有3种晶型，即金红石、锐钛矿和板钛矿结构，其中金红石和锐钛矿属四方晶系，板钛矿属正交晶系。
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Analysis data indicates that most of Ti belong to hexad cubic system of α-Ti changes to cubic system of β-TiD2, and the existance of new elements in electrolytic products is determined.
对电解产物的X射线衍射分析肯定了电解前属六方晶系的α-Ti大部分转变成立方晶系的份β-TiD2，并检测到了新的元素成份。
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Sc, there are two kinds of isotopes shaped body, the structure is trigonal system and the hexagonal Department, is found in the periodic table predicted decades before the first one confirmed the correctness of the periodic table of elements, which is very famous.
周期表中ⅢB族有银白色金属光泽的固体金属过渡元素，又属稀土元素，原子序数Z＝21，原子量4959，化学符F号Sc，有两种同位素异形体，结构正方晶系和六角晶系，是周期表预言十年后才发现的第一个证实周期表正确性的元素，因而很有名气。
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The Si/Al ratio of NaY molecular sieve was determined by an empirical formula of lattice constant obtained by extension function method of X-ray diffraction and framework Si/Al ratio of NaY molecular sieve determined by solid nuclear magnetic resonant spectrum method.
前言晶胞参数是决定晶体结构的重要参数之一，Na Y超稳分子筛属立方晶系，由于 Na Y超稳分子筛骨架硅铝比受许多条件的影响，如投料比、晶化温度、晶化压力和晶化时间等。通过研究发现分子筛骨架的硅铝比与其晶胞参数相关，而分子筛的硅铝比可作为合成分子筛产品质量的控制指标 [1] 。
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The formation mechanism of the screw structures on the surfaces of polytype crystals is discussed according to the theoretical model of anionic coordination polyhedron growth units.
本文用负离子配位多面体生长基元理论模型讨论了多型性晶体表面螺旋结构的形成，提出在多型性晶体中配位多面体呈层状分布，配位多面体的面为层的边界，上、下层负离子配位多面体不是呈镜象对称的，在三方晶系和六方晶系的晶体中是沿晶轴a、b错开，上、下两层负离子配位多面体体呈交叉对应，从而达到稳定平衡。
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The copper atom is in a planar coordination site of [N_2O_2] and it devites from the mean plane by only 0.80 pm. Byπ-πstacking interactions, a alabastrine structure was obtained.(2)Schiff-base complex [Cu(H_2O)]·H_2O, where H3GS is the 3-carboxyl -salicylidene glycine, was synthesized and characterized by elemental analysis, IR spectra and single-crystal analysis. The crystal belongs to monoclinic system, space group P2(1)/c, a=848.46(3)pm, b=681.54(3)pm, c=1967.16(8)pm,β=95.8210(10)°, Z=4, R_1=0.0279, wR_2=0.0724. The copper atom is in a square-pyramidal field with the base
结果表明该晶系属单斜晶系，空间群P2(1)/c，晶胞参数：a=848.46(3)pm，b=681.54(3)pm，c=1967.16(8)pm，α=90°，β=95.8210(10)°，γ=90°，Z=4，R_1=0.0279，wR_2=0.0724，Cu原子位于轻微变形的四方锥场底心，底面被氮原子、酚氧原子、甘氨酸羧基的一个氧原子和一个水分子氧原子占据，而甘氨酸羧基的另一个氧原子占据相邻分子的锥顶，因而形成一维链状结构；合成了单核双聚配合物Na_2[Cu_2_2]·2H_2O ，铜三核配合物Cu_3_2·5H_2O和铜锌异三核配合物ZnCu_2_2·5H_2O，并用元素分析，IR光谱，电子光谱和磁化率测定对配合物的组
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Gibbsite from which, also known as the aluminum water of oxygen stone components for the Al 3, monoclinic, usually Species Flake collectivity; A Diaspor (diaspore; Empholite) also known as hard water with aluminum components α- AIO, the regular - Fe, Mn, rhomboidal, sustained Species Flake collectivities hardness (6-7); a water boehmite, also known as the mixing aluminum components γ- AlO, the rhomboidal appearing Aphanitic block or colloidal.
密度2-3。其中三水铝石又称水铝氧石，成分为Al3，单斜晶系，通常呈细鳞片状集合体；一水硬铝（diaspore；empholite）又称硬水铝矿，成分α-AIO，常含Fe、Mn，斜方晶系，多呈细鳞片状集合体，硬度大（6-7）；一水软铝石又称勃姆铝矿，成分γ-AlO，斜方晶系，常呈隐晶质块体或胶态。
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There occure 10 stoichiometrical compounds with RE∶Ag=1∶5,2∶9,1∶4,14∶51,2∶7,1∶3,1∶2,1∶1,3∶2和5∶2 and 19 crystal structures,4 eutectic systems with 10 eutectic reactions,and 8 peritectic reactions in Ag-RE systems.
在Ag-RE系中出现1∶5、2∶9、1∶4、14∶51、2∶7、1∶3、1∶2、1∶1、3∶2和5∶2十种化学计量化合物和19种晶体结构，4个共晶系10种共晶反应和8种包晶反应。
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Spinel is a compound of magnesia and alumina(Al2O3) and is thus a magnesium aluminate(MgAl2O4), found as accessories in igneous rocks, in metamorphosed aluminous schists, in contact metamorphosed limestones and sometimes in high temperature iore veins.
尖晶石主要成分是氧化镁和氧化铝，结晶习性是等轴晶系漂亮的正八面体。镁被铁置换就是铁尖晶石，被锌置换就是锌尖晶石，铁完全置换镁形成磁铁矿，铬置换铁尖晶石形成铬铁矿，这些类质同相的等轴晶系都是八面体结晶的尖晶石族矿物。
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The larger the atomic volume construction,the higher the stability of intermediate phase.There exist 4 eutectic systems with 9 eutectic reactions in Au-RE systems.A criterion exists between the reduced eutectic temperatureand the atomic radiiof RE metals:the Teu/TA values dedine linearly with the increase of rR Value and keep essentially a constant when rRE values are larger than 0.175nm (namely the atomic size differences between RE and Au are larger than 21%).
Au-RE系中存在4个共晶系9种共晶反应，简约共晶温度与RE原子尺寸之间存在一个判据：简约共晶温度随RE原子半径增大呈线性下降，但当RE原子半径达到约0.175nm(即与Au相对尺寸差21％)时，更大原子尺寸差不再影响液相线和共晶温度下降，简约共晶温度保持常数。
- 更多网络解释与晶系相关的网络解释 [注：此内容来源于网络，仅供参考]
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crystal system：晶系
需要附带指出的是,布拉维系与七大晶系(crystal system)并不一一对应,其交错之处为:七晶系中无菱方而有三方;三方晶系有的属菱方布拉维系(取菱方晶胞),有的却属立方布拉维系(取六方晶胞).
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Orthorhombic crystal system：斜方晶系;正交晶系
"斜方双楔","orthorhombic bisphenoid" | "斜方晶系;正交晶系","orthorhombic crystal system" | "斜方双锥","orthorhombic dipyramid"
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cubic system：立方晶系
立方晶系 等轴晶系(isometric system):也叫立方晶系(cubic system)它有4个3次对称轴以及3个互相垂直的4次对称轴或者3个相互垂直的2次对称轴. 其中的3个互相垂直的4次对称轴或者3个相互垂直的2次对称轴是晶体结晶轴. 轴角α=β=γ=90o,
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Hexagonal：六方晶系
蓝宝石是一种透明的基板.蓝宝石原本是三方晶系(trigonal)的结构,但三角形的布拉维晶格只要选取适当的基底向量,就可以使它变成六方晶系(hexagonal)的结构.在本文中,我们将使用CASTEP模拟软体取得不受应力的wurtzite结构InxGa1-xN,
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orthorhombic system：斜方晶系
摘要: 毒重石(Witherite) 天然碳酸钡 类别:碳酸盐(Carbonates),遇酸发泡 化学成分:BaCO3 晶系:斜方晶系(Orthorhombic system)2/m2/m2/m,晶体通常以(110)为双晶面,以三个单晶互生之形式,形成假六方双锥面,锥面上常有深的平行条纹,
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tetragonal system：四方[晶]系= 四角晶系
ternary fission 三分核分裂 =三分裂變 | tetragonal system 四方[晶]系= 四角晶系 | tetrahedral group 四面體群
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trigonal system：三方晶系(菱面体晶系)
三方单锥 trigonal pyramid | 三方晶系(菱面体晶系) trigonal system | 三方偏方面体 trigonal trapezohedron
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monoclinic system：單斜[晶]系 =單斜晶系
monochromator 單光儀,單光器= 單色儀 | monoclinic system 單斜[晶]系 =單斜晶系 | monopole transition 單極躍遷
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rhombohedral system：菱形晶系;三角晶系
rhombic system 斜方晶系 | rhombohedral system 菱形晶系;三角晶系 | rhombohedron 菱体
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trimetric system：斜方晶系;正交晶系
"三维投影","trimetric projection" | "斜方晶系;正交晶系","trimetric system" | "同质三像(体)","trimorph"