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xray powder diffraction
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  xray powder diffraction
Wilson at Queen Mary for high resolution X-ray powder diffraction data collection and M.
      
Use of morphological ratio data for applying preferred orientation corrections to x-ray powder diffraction data.
      
The structures of the complexes in which M = Sb and Bi are unknown but the complexes were shown by X-ray powder diffraction to be isostructural.
      
The structure of the obtained crystals were determined by using X-ray powder diffraction.
      
The re-synthesized sample was annealed and analyzed using the X-ray powder diffraction method and photoacoustic infra red spectroscopy.
      
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The (Na_(0.5)Bi_(0.5)) TiO_3-BaTiO_3 system, at certain composition range, is a new kind of ultrasonic transducer ceramics material which has good and unique properties. By means of Xray powder diffraction method, we precisely determined the cell parameters of ( Na_(0.5)Bi_(0.5)) TiO_3, and propose a new type of lattice structure for it different from that in previous reports. For this system, the lattice parameters at different compositions were determined. And the preliminary discussions on the relations...

The (Na_(0.5)Bi_(0.5)) TiO_3-BaTiO_3 system, at certain composition range, is a new kind of ultrasonic transducer ceramics material which has good and unique properties. By means of Xray powder diffraction method, we precisely determined the cell parameters of ( Na_(0.5)Bi_(0.5)) TiO_3, and propose a new type of lattice structure for it different from that in previous reports. For this system, the lattice parameters at different compositions were determined. And the preliminary discussions on the relations between the properties, cell dimensions and compositions as well as the phase relation were also given.

(Na_(0.5)Bi_(0.5))TiO_3-BaTiO_3系统在一定组成范围内是性能优良而独特的超声换能器陶瓷新材料。本文工作用X射线粉末衍射方法精确测定了单组分(Na_(0.5)Bi_(0.5))TiO_3的晶胞参数,提出与前所报道不同的新的晶胞类型;在此基础上给出该系统不同组成点的晶格参数,并对性能、晶格参数和组成之间关系和相关系作初步讨论。

The montebrasite is an important typomorphic mineral in the Nanping rare-metal granitic pegmatites, which can be grouped into original type and secondary type. Most of them are the montebrasites of the orginal type,which occurs as a massive structure. The main associated minerals include albite, potash-feldspar, spodumene, Nb-Ta minerals. The paper presents the analysis results of the naping montebrasite, such as the chemical composition, Xray powder diffraction data, IR spectrum and differential thermal...

The montebrasite is an important typomorphic mineral in the Nanping rare-metal granitic pegmatites, which can be grouped into original type and secondary type. Most of them are the montebrasites of the orginal type,which occurs as a massive structure. The main associated minerals include albite, potash-feldspar, spodumene, Nb-Ta minerals. The paper presents the analysis results of the naping montebrasite, such as the chemical composition, Xray powder diffraction data, IR spectrum and differential thermal curves. The metasomatic alteration of the Naping original montebrasite is very strong. From early to late stage, the major metasomatic-alteration mineral assemblages include the quartz-cleavelandite, the secondary montebrasite, the fine-crystalline albite-quartz-secondary apatite, the secondary corn-plex phosphate minerals and sericite.

羟磷铝锂石是南平稀有金属花岗伟晶岩中的重要标型矿物,可分为原生和次生两大类,最主要的是前者,一般呈块体状,共生矿物主要有销长石,钾长石,锂辉石,铌钽矿物。本文详细讨论了南平羟磷铝锂石的化学成分、X射线粉晶衍射资料、红外光谱和差热分析结果。南平原生羟磷铝锂石的交代蚀变作用十分发育,按其先后顺序,交代蚀变矿物组合有:石英—叶钠长石、次生羟磷铝锂石、细晶销长石—石英—次生磷灰石、次生复杂磷酸盐矿物和绢云母。

Study and preparation of pyroxene crystalline glaze with natural minerals and rocks are reported in the paper.Crystal phases of pyroxene crystalline glaze were determined to be diopside by optical microscope,electron microprobe analysis and Xray powder diffraction,and also by the nomination method proposed by Internation Minerals Pyroxene Group.The lattice parameters are :a 0=9.735,b 0=8.920,c 0=5.262 and β=106°20′.

利用天然矿物岩石为原料试制大晶体辉石类结晶釉陶瓷,并根据结晶釉中析出晶体的形成条件、生长习性、化学组成和晶体结构,应用光学显微镜、X射线结构分析和电子探针成分分析等手段,参照国际矿物学辉石小组确定的辉石命名法,最后确定该釉中析晶晶体为透辉石。

 
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