晶石的

The crystal-chemical properties and the genesis of the allanite have been disscussed, in addition, the radioative decay of Th and U and the oxidation cause rare-earth elements to be released from its lattice to d...

认为本区的褐帘石是部分变生的。变生的机理是因为其晶格中含放射性元素U，Th高，且这与褐帘石的选矿性能有重要关系。

Based on the similarity of structure between the antifluoride and alkali antimonide, the possible transitions taking place in the Brillouin zone corresponding to the structure in the optical spectra are identified for Na_2KSb,Css_3Sb and K_2CsSb cathode.

利用反荧石结构和其结构的相似性，确定了Na2KSb、Cs3Sb和K2CsSb阴极在光谱结构上对应布里渊区中发生的光学跃迁，发现多碱阴极的跃迁更接近晶态，而Cs3Sb和K2CsSb阴极和非晶态的非常类似，在Na2KSb中出现的来自Δ、Σ方向跃迁形成的极大峰并不出现在Cs3Sb和K2CsSb。

These characteristics confirmed further that some features of inclusion, especially their types, in a same subgroup of chondrite are similar.

富杆拦石集合体和富黄长石包体的稀土模式大多数为平坦型，富尖晶石包体NQ-32有Ⅱ型的稀土模式，这些特征进一步证实同类球粒陨石的难熔包体特征，尤其是它们的类别是相似的。

It is feasible to overgrow mesoporous MCM-41 on the rough surfaces of the grains. The obtained samples possess the ordered hexagonal mesoporous structure of MCM-41-type molecular sieves. Mesoporous molecular sieves (denoted as MZ-B) with ordered hexagonal structure have been successfully synthesized by the assembly of the precursors from filtrate of alkali-treated ZSM-5 zeolite with CTMABr surfactant micelles in alkaline media based on S+I– static electricity route.

而碱处理ZSM-5沸石得到的滤饼为富含超细化颗粒的晶粒，且晶粒粗糙度很高，因此易于附晶生长介孔分子筛，得到的微孔颗粒表面附晶生长的介孔分子筛，具有很好的长程有序度，为六方排列的孔道结构。

According to the electrical diffraction of the conglomeration, the particles are A-zeolite crystals. In the surface of micro-crystal of A-zeolite, the cuboidal nano-crystal A-zeolite grows, so A-zeolite crystal steps can be observed with TEM.

同时，在A型沸石的晶化初期，样品的TEM照片中可见许多团聚体，部分团聚体表现为A型沸石所具有的立方体形态，根据电子衍射测定，构成团聚体的颗粒为大量的纳米晶体。

In the condition of keeping F、 K、Na content fixed, To improve slag structure and raise slag melting point and viscosity, MgO content is raised and TiO〓 is added. the main content is as follows:(1) Keeping CaO/SiO〓 fixed, MgO content rises from 10% to 16%, the free running temperature goes up 106℃, the viscosity goe down at bigger than 1425℃, but difference is little; keeping /SiO〓 fixed, MgO content rises from 10% to 16%, the free running temperature rises 87℃, the viscosity rises too; adding TiO〓 to 5%, the free running temperature goes up 98℃, the viscosity rise a little.(2) Powder crystal x ray diffraction and microscopic analysis shows: increasing MgO content, the cuspidine will decreace or even disappear, the monticellite goes up with MgO content rising, keeping /SiO〓 fixed, Akermanite content goes up, for high melting point minerals appear or go up, the free running temperature of the slag bearing F is raised; Adding TiO〓, high melting point mineral—Perovskite forms, it can making other minerals'crystalling fast, it is the reason that TiO〓 raises the free running temperature of the slag bearing F.

2对测定粘度的冷凝渣所进行的X粉晶衍射及显微分析和鉴定表明，增加MgO含量，渣中枪晶石将减少甚至消失，而钙镁橄榄石则随MgO含量增加而增加，在／SiO〓不变时，黄长石含量也有所增加，高熔点矿物的出现和增加，提高了含氟熔渣的熔化性温度；加入TiO〓熔渣中将形成高熔点矿物-钙钛矿，钙钛矿的形成还促使黄长石的结晶，这是TiO〓提高含氟熔渣熔化性温度的根本原因。

The dust around PG 2112+059 contains large quantities of rock-forming minerals, including crystalline forms of silica, a form of aluminium oxide called corundum (better known on Earth as the principal ingredient of rubies and sapphires) and a form of magnesium oxide called periclase.

PG 2112+059类星体周围的尘埃含有大量形成岩石的矿物，包括硅晶石，被称作刚玉的铝氧化物（更为通俗易懂的说法是红宝石和蓝宝石的主要成分），以及镁氧化物——方镁石。

After fired at 1600℃, with the increase of zircon addition the bulk density of the samples increases while apparent porosity decreases. When zircon addition is 4%, the strength is the best, and the photomicrograph of the sample exhibits a densely packed microstructure, with larger and better developed grains of periclase and spinel. Meanwhile, the direct bonding of solid phases is reinforced.

在1600℃热处理下，随着w(ZrSiO4)的增加，试样的体积密度增大，显气孔率变小，试样力学强度在w(ZrSiO4)为4%时达到最大值。w(ZrSiO4)为4%的试样整体显微结构致密，固相直接结合程度提高；并且方镁石和尖晶石晶粒的晶粒尺寸粗大，晶粒发育比较完整。

Effect of decomposition conditions on the ratio of seeded decomposition and properties of precipitation products from sodium aluminate solutions with the very light boehmite seed prepared from the hydrothermal homogeneous precipitation between aluminum sulfate and urea, was studied. Mechanism of the very light boehmite precipitation process was also analyzed.

以硫酸铝和尿素水热均相沉淀合成的低密度－水软铝石为晶种，研究分解条件对溶液分解率和分解产物性质的影响，还对从铝酸钠溶液析出低密度－水软铝石的过程进行了初步分析。

Effect of decomposition conditions on the ratio of seeded decomposition and properties of precipitation products from sodium aluminate solutions with the very light boehmite seed prepared from the hydrothermal homogeneous precipitation between aluminum sulfate and urea, was studied. Mechanism of the very light boehmite precipitation process was also analyzed.

摘 要：以硫酸铝和尿素水热均相沉淀合成的低密度一水软铝石为晶种，研究分解条件对溶液分解率和分解产物性质的影响，还对从铝酸钠溶液析出低密度一水软铝石的过程进行了初步分析。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐