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.

在國內(nèi)看黄免费看、外首次發(fā)現(xiàn)此類人工合成瀝青鈾礦和天然瀝青鈾礦在晶體結(jié)構(gòu)的有序—無序上存在重大差異：天然瀝青鈾礦中的納米級晶質(zhì)鈾礦為有序排列，而人工合成瀝青鈾礦中的納米級晶質(zhì)鈾礦則為無序排列。

A massive variety of the mineral uraninite.

它坐落在巨石的壁壘上，俯瞰著湖水色色色婷。

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

科羅拉多型礦床中的鈾礦物為晶質(zhì)鈾礦和水硅鈾礦，與之共生的還有釩又黄又粗又大又长又色又爽，銅礦物国产老人性交黄片。

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 ''.

一種含有氧化鈾和少量鐳、釷精品久久久久久电影综合、釙农村丰满饥渴老女人性视频、鉛、氦的礦物精品国产手机在线观看；塊狀的晶質(zhì)鈾礦稱為瀝青鈾礦亚洲系列在线，是主要的鈾礦石。

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.

通過鈾鉛同位素體系研究發(fā)現(xiàn)http://800av.com/，礦化年齡在407Ma左右久久国产精品久久久久，與Rb-Sr全巖等時(shí)線年齡接近中文字幕Aⅴ无码一区二区三区。

Uraninite is the only ore mineral .

唯一的礦石礦物為晶質(zhì)鈾礦色哟哟网站www。

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.

為了提高鈾礦酸法浸出的浸出率，根據(jù)實(shí)際工作經(jīng)驗(yàn)選取了包括酸耗免费观看全成年网站大全、時(shí)間个人上传网上性交毛片、溫度4個(gè)指標(biāo)作為影響浸出率建模變量。

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

脂鉛鈾礦一種由桔紅到黃灰色的多種鈾氧化物黄色工厂免费、硅酸鹽和鹽的混和物欧美黑人双飞视频3区，在鈾礦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.

系統(tǒng)地總結(jié)了天然類比研究的現(xiàn)狀，包括瀝青鈾礦與UO2的可比性xxxxxcom、瀝青鈾礦風(fēng)化產(chǎn)物的共生組合和共生次序717理论电影、瀝青鈾礦及其風(fēng)化產(chǎn)物的化學(xué)成分特征、瀝青鈾礦風(fēng)化過程中類比元素的遷移性等亚洲精品国产精品乱码不卡√；并初步指出了進(jìn)一步研究的方向免费无遮挡禁18网站，如鈾酰礦物的微結(jié)構(gòu)研究、類比元素在瀝青鈾礦和鈾酰礦物中分布的激光探針研究久久兔费黄色视频、地下水成分分析国产精品一区二区哟哟视频、模擬實(shí)驗(yàn)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黃鐵礦氧化亚洲乱码一区二区在线欧美、黃鐵礦和黃銅礦形成com国产、晶質(zhì)鈾礦和磁鐵礦溶解的速率定律和反應(yīng)機(jī)理，發(fā)現(xiàn)：(1)酸性溶液中黃鐵礦的氧化速率對Fe3+和O2濃度呈分?jǐn)?shù)依賴并受表面反應(yīng)的控制；(2)低于300 ℃時(shí)黃鐵礦不能從溶液中直接成核99视频这有这里有精品，而需初始地通過FeS先驅(qū)物的硫化生成AV无码国产精品一区，F(xiàn)eS與H2S反應(yīng)形成黃鐵礦的速率方程為二級；(3)磁黃鐵礦或黃鐵礦與Cu2+反應(yīng)均可形成黃銅礦人人看人人摸人人操人人色，前者經(jīng)歷了一系列準(zhǔn)穩(wěn)的Cu-Fe硫化物的中間物有色有爽，后者的速率方程為表觀一級并受表面反應(yīng)的控制；(4)酸性pH時(shí)磁鐵礦的非線性溶解行為可采用表面反應(yīng)擴(kuò)散輸運(yùn)耦合的收縮核模型來描述很黄AAAAAAAAA片。