کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1233655 | 968812 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Raman spectroscopic study of the tellurite minerals: Mackayite and quetzalcoatlite
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Raman spectroscopic study of the tellurite minerals: Mackayite and quetzalcoatlite Raman spectroscopic study of the tellurite minerals: Mackayite and quetzalcoatlite](/preview/png/1233655.png)
چکیده انگلیسی
Tellurites may be subdivided according to formula and structure. There are five groups based upon the formulae: (a) A(XO3), (b) A(XO3)·xH2O, (c) A2(XO3)3·x2O, (d) A2(X2O5) and (e) A(X3O8). Raman spectroscopy has been used to study mackayite and quetzalcoatlite are examples of tellurites containing OH units Raman bands for mackayite observed at 732, 782 and 579, 635 cmâ1 are assigned to the ν1 (Te2O5)2â symmetric stretching and ν3 (Te2O5)2â antisymmetric stretching modes. The Raman spectral profile of quetzalcoatlite is more complex with a considerable number of overlapping bands. Two bands may be resolved at 719 and 754 cmâ1 which may be attributed to ν1 (Te2O5)2â symmetric stretching mode. The two Raman bands of quetzalcoatlite at 602 and 606 cmâ1 are accounted for by the ν3 (Te2O5)2â antisymmetric stretching mode. Raman bands for mackayite, observed at 306, 349, 379 and 424, 436 cmâ1 are assigned to the (Te2O5)2â ν2 (A1) bending mode and ν4 (E) bending modes. This research shows that Raman spectroscopy may be applied to tellurite minerals successfully.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 72, Issue 2, March 2009, Pages 445-448
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 72, Issue 2, March 2009, Pages 445-448
نویسندگان
Ray L. Frost, Marilla J. Dickfos,