THERMAL BEHAVIOR OF A NATURAL SEPIOLITE FROM NORTHEASTERN IRAN

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HOJATI S.; KHADEMI H.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Journal of Sciences, Islamic Republic of Iran Year:2013 | Volume:24 | Issue:2 Page(s): 129-134

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Title

THERMAL BEHAVIOR OF A NATURAL SEPIOLITE FROM NORTHEASTERN IRAN

Author(s)

HOJATI S. | KHADEMI H. | Issue Writer Certificate

Keywords

SEPIOLITE

ENSTATITE

ZEOLITIC WATER

INFRARED SPECTROSCOPY

Abstract

SEPIOLITE deposits have been recently discovered in northeastern Iran. However, there is still little information about its physicochemical and mineralogical characteristics. Therefore, the collapse of the SEPIOLITE (with sizes of<63 mm) structure induced by temperature elevation in an electric furnace at 350, 550, and 850oC for 4 hours was studied using X-ray diffraction (XRD) in combination with Thermogravimetric analysis (TGA) and infrared spectroscopic analysis. Results showed that the main mineral constituent of the samples is a well crystallized SEPIOLITE. However, dolomite and quartz were also present in minor amounts. Results also revealed that with temperature different phases including ‘SEPIOLITE dihydrite’, ‘SEPIOLITE anhydrite’ and ‘enstatite’ were formed, as magnesium coordinated water and octahedrically coordinated hydroxyl groups, were eliminated and the dehydroxylated phase was recrystallized to ENSTATITE, a stable form of magnesium silicate (MgSiO3).

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APA: Copy

HOJATI, S., & KHADEMI, H.. (2013). THERMAL BEHAVIOR OF A NATURAL SEPIOLITE FROM NORTHEASTERN IRAN. JOURNAL OF SCIENCES ISLAMIC REPUBLIC OF IRAN, 24(2), 129-134. SID. https://sid.ir/paper/591844/en

Vancouver: Copy

HOJATI S., KHADEMI H.. THERMAL BEHAVIOR OF A NATURAL SEPIOLITE FROM NORTHEASTERN IRAN. JOURNAL OF SCIENCES ISLAMIC REPUBLIC OF IRAN[Internet]. 2013;24(2):129-134. Available from: https://sid.ir/paper/591844/en

IEEE: Copy

S. HOJATI, and H. KHADEMI, “THERMAL BEHAVIOR OF A NATURAL SEPIOLITE FROM NORTHEASTERN IRAN,” JOURNAL OF SCIENCES ISLAMIC REPUBLIC OF IRAN, vol. 24, no. 2, pp. 129–134, 2013, [Online]. Available: https://sid.ir/paper/591844/en

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