查询词典 uraninite

It is first found that there is an important difference in order-disorder of crystalline structure between the artificial pitchblende and natural pitchblende. Unlike natural pitchblende in which uraninite nanocrystals arrange in order, the artificial pitchblende only contains disorderly uraninite nanocrystals.

在国内、外首次发现此类人工合成沥青铀矿和天然沥青铀矿在晶体结构的有序—无序上存在重大差异：天然沥青铀矿中的纳米级晶质铀矿为有序排列，而人工合成沥青铀矿中的纳米级晶质铀矿则为无序排列。

A massive variety of the mineral uraninite.

它坐落在巨石的壁垒上，俯瞰着湖水。

Ore minerals in the Colorado-type deposits are of uraninite and coffinite, with associated vanadium and copper minerals.

科罗拉多型矿床中的铀矿物为晶质铀矿和水硅铀矿，与之共生的还有钒，铜矿物。

A mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called ''.

一种含有氧化铀和少量镭、钍、钋、铅、氦的矿物；块状的晶质铀矿称为沥青铀矿，是主要的铀矿石。

U-Pb isotopic system of uraninite gives a mineralization age of 407 Ma ±, this is similar to the whole-rock isochron age of Rb-Sr.

通过铀铅同位素体系研究发现，矿化年龄在407Ma左右，与Rb-Sr全岩等时线年龄接近。

Uraninite is the only ore mineral .

唯一的矿石矿物为晶质铀矿。

In order to enhance the acid leaching rate of the mineral uraninite, selected four indexes including acid consumption, time and temperature as the evaluation factors with influence acid leaching of actual manufacturing experience.

为了提高铀矿酸法浸出的浸出率，根据实际工作经验选取了包括酸耗、时间、温度4个指标作为影响浸出率建模变量。

An orange - red to grayish yellow mixture of several uranium oxides, silicate s,and salts occurring naturally in the oxidation and hydration of uraninite.

脂铅铀矿一种由桔红到黄灰色的多种铀氧化物、硅酸盐和盐的混和物，在铀矿物的自然氧化作用和水合作用中形成

In this paper, the progresses acquired in the studies of natural analogy are summarized, including a comparison of structural properties, radiation damage and chemical composition between uraninite and UO2, combination and paragenesis of alteration products of uraninite, chemical composition of uraninite and its secondary phases, mobility of analogy elements in the process of uraninite alteration. In addition, the problems in next studies are pointed out, e. g., characterization of micro-structure of secondary uranium minerals, high-resolution analyses of trance elements distributed in original and secondary uranium minerals using laser microprobe analyzer, composition of underground water, simulation experiments.

系统地总结了天然类比研究的现状，包括沥青铀矿与UO2的可比性、沥青铀矿风化产物的共生组合和共生次序、沥青铀矿及其风化产物的化学成分特征、沥青铀矿风化过程中类比元素的迁移性等；并初步指出了进一步研究的方向，如铀酰矿物的微结构研究、类比元素在沥青铀矿和铀酰矿物中分布的激光探针研究、地下水成分分析、模拟实验等。

At present,the rate laws and reaction mechanisms of pyrite oxidation,pyrite and chalcopyrite formation,uraninite and magnetite dissolution in aqueous solutions are mainly studied,and it is discovered that (1)oxidation rate of pyrite controlled by surface reaction assume fractional dependence on Fe3+ and O2 molalities in acid solutions;(2)Pyrite cannot nucleate directly from solutions below 300 ℃,it can only form initially through sulfidation of a FeS precursor. The rate equation of reaction between FeS and H2S to form pyrite is of the second order;(3)Chalcopyrite is formed by reactions of pyrrhotite or pyrite with Cu2+,the former proceeds via a series of mediate metastable phases of Cu-Fe sulfide,whereas the rate equation of the latter is apparently of the first order which is controlled by surface reaction;(4)The nonlinear behavior of magnetite dissolution at acid pH can be represented by a shrinking core model coupling with surface reaction and diffusion transport.

目前主要研究了水溶液中黄铁矿氧化、黄铁矿和黄铜矿形成、晶质铀矿和磁铁矿溶解的速率定律和反应机理，发现：(1)酸性溶液中黄铁矿的氧化速率对Fe3+和O2浓度呈分数依赖并受表面反应的控制；(2)低于300 ℃时黄铁矿不能从溶液中直接成核，而需初始地通过FeS先驱物的硫化生成，FeS与H2S反应形成黄铁矿的速率方程为二级；(3)磁黄铁矿或黄铁矿与Cu2+反应均可形成黄铜矿，前者经历了一系列准稳的Cu-Fe硫化物的中间物，后者的速率方程为表观一级并受表面反应的控制；(4)酸性pH时磁铁矿的非线性溶解行为可采用表面反应扩散输运耦合的收缩核模型来描述。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了