部分变生褐帘石的谱学、成因与工艺性质

来源期刊：中南大学学报(自然科学版)1987年第4期

论文作者：彭明生 李迪恩

文章页码：362 - 368

关键词：褐帘石； 稀土矿床； 成矿条件； 变生作用； 矿床成因论； 晶体化学； 谱分析(数学)； 电子微探针分析； X射线衍射分析； 红外分光光谱法； 穆斯堡尔谱法； 选矿方法； 部分变生； 占位

Key words：allanite; rare earth mineral; condition of ore formation; metagenesis; metallogeny; crystal chemistry; spectral analysis(mathematics); electroa micro-probe analysis; X-ray diffraction analysis; infrared spectrophotometry; Mossbauer spectrometry; beneficiation methods

摘    要：本文用电子探针分析、X射线衍射、红外光谱及穆斯堡尔谱研究了其稀土矿床中部分变生的褐帘石,褐帘石的穆斯堡尔谱表明Fe²⁺/Fe³⁺>1;Fe²⁺和Fe³⁺在M（1）和M（3）位置中的无序度分别为0.49和0.61,大于未变生的褐帘石;说明该褐帘石在温度较高,较还原的条件下形成。褐帘石晶格中的U,Th等放射性元素使其部分变生。用浮选剂C_16-18硫化羧酸不能有效地浮选部分变生的褐帘石,但其中Th,U的放射性衰变与氧化作用使稀土元素从晶格中释放出来,形成风化壳型的离子吸附稀土矿床,用盐水等电解质溶液即可提取80%以上的稀土元素。

Abstract: Electronic microprobe analysis, X-ray diffraction, infrared spectrum, Mossbauer spectrum havebeen used to study partly-metamict allanite in some rare-earth deposit in this work. Mossbauer spec-trum of allanite shows that the ratio of Fe²⁺ to Fe³⁺ is more than 1, and the disordering degreesof Fe²⁺, Fe³⁺ in the M（1） and M（3） sites are 0.49 and 0.61 respectively, which are larger thanthose of non-metamiet allanite, so the allanite is crystalized and stable at high temperature and inmore reductive condition. Radioactive elements’ such as Th ard U, in its lattice make the allanitepartly-metamict. Although in the case of the partly-metamict allanite, the flotation agent C_16-18sulfurized carboxylic acid is less effective, the radioactive decay of Th and U, and the oxidationcause rare-earth elements to be released from its lattice, forming the ion-absorbing weathered crustdeposit of rare-earth elements. More than 80% of the rare-earth elements can be extracted by usingthe electrolytes such as salt water.