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| 題 名 | Refinement of Nontronite, Celadonite and Sepiolite Mossbauer Spectra at 77k Temperature=綠脫石、綠鱗石及海泡石之低溫梅思堡光譜分析 |
|---|---|
| 作 者 | 張家銘; 王明光; 潘永中; 鄭伯昆; 陳培源; | 書刊名 | 中國地質學會會刊 |
| 卷 期 | 36:2 1993.04[民82.04] |
| 頁 次 | 頁189-202 |
| 分類號 | 358.13 |
| 關鍵詞 | 光譜分析; 低溫; 海泡石; 梅思堡; 綠脫石; 綠鱗石; |
| 語 文 | 英文(English) |
| 中文摘要 | 採自花蓮大港口之綠脫石,及臺東叭嗡嗡地區之綠鱗石與海泡石樣本,經磨碎分 散,抽離純化後,供試樣品以X-光繞射法鑑定其物種,並利用電子顯微鏡觀察其型態,得 知其並無任何氧化鐵不純物之存在; 然而,從低溫( 77K )梅思堡分析結果則顯示,在綠 脫石及綠鱗石樣品中,含有微量晶性不良之赤鐵礦,其梅思堡參數中之有效磁場強度分別為 511 與 518 kOe。 梅思堡譜圖經勞倫茲曲線迴歸分析後可得知,綠脫石之譜圖乃由三組二重分裂峰與一組六重 分裂峰所共同組合而成,其分別由位於順式氫氧基及反式氫氧基配位之鐵離子,與位於八面 體座落之亞鐵離子,以及晶性不良或受鋁取代之赤鐵礦所貢獻;綠鱗石樣品之譜圖是由位於 八面體座落之鐵離子與亞鐵離子所貢獻之兩組二重分裂峰,與晶性不良或受鋁取代之赤鐵礦 所貢獻之一組六重分裂峰共同組合而成。 海泡石之低溫梅思堡譜圖則可解析成由三組二重分裂峰所組成,第一組是屬於位居八面體座 落之亞鐵離子所貢獻,第二組是由順式氫氧基配位座落之鐵離子所貢獻,第三組二重分裂峰 則由反式氫氧基配位座落以及晶體邊緣之鐵離子所貢獻。 |
| 英文摘要 | Nontronite sample was collected from Ta-Kan-Ko, Hua-Lien county, celadonite and sepiolite from Pa-Weng-Weng, Taitung county in Taiwan. Samples were crushed, dispersed and fractionated by conventional procedures. The tested samples were examined by Toshiba X-ray diffractometer (XRD) with FeK α radiation and electron microscope. These samples did not contain any iron oxides impurities by X-ray analysis. However, the Mossbauer analyses at 77K temperature show that nontronite and celadonite are present small amounts of hematite. Effective magnetic field strength (Heff) are 511 and 518 kOe, with respect to nontronite and celadonite samples. The sepiolite Mossbauer spectrum at 77 K did not resolve a sextet of hematite impurity. Regression analysis of fitting Lorentzian curve indicates that nontronite spectrum could be regressive as three sets of doublet and a sextet, which could be assigned as cis-OH (M2) and trans-OH (M1) of Fe �� in structure, Fe �� in octahedron, and contributed by poor crystalline hematite particles or Al-substituted hematite. The Mossbauer spectrum of celadonite compose two sets of doublet as Fe �� and Fe �� in octahedron, and a set of sextet due to poor crystallinity of Al-substituted hematite particles. Sepiolite Mossbauer spectrum could be resolved as three sets of doublet. The first component of doublet was assigned as Fe �� in octahedron. The second component was assigned as cis-OH (M2) located in Fe �� octahedron, and third set of doublet contributed by trans-OH (M1) in octahedron and Fe �� in crystal edge. |
本系統中英文摘要資訊取自各篇刊載內容。