کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1796728 1023752 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Asymmetry of growth and dissolution on basal, minor rhombohedral and prism faces of quartz
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Asymmetry of growth and dissolution on basal, minor rhombohedral and prism faces of quartz
چکیده انگلیسی

Hydrothermal method of temperature difference was employed to determine relationship between growth and dissolution rates on the basal, minor rhombohedral and prism faces of quartz at the same absolute values of the temperature gradient, |ΔT|, and correspondingly the same absolute values of super- and undersaturations, |ΔC|. The experiments were carried out in 1 m NaOH solution pre-saturated with silica at 1 kbar and (a) 300, 320, 340, 350, 360 °C and |ΔT|=10 °C; (b) 350 °C and |ΔT|=10, 15, 20 °C. It was found, that the ratio between absolute values of dissolution and growth rates increased from ∼0.9 to 9.0 on the following quartz faces: basal kinked face of maximum growth rate; minor rhombohedral flat face, having small area and intermediate growth rate; and prism flat face of maximum area and minimum growth rate, thus reflecting enhancement of growth and dissolving asymmetry (the weakest on the kinked face and the highest on the flat one, of maximal area).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 294, Issue 2, 4 September 2006, Pages 330–338
نویسندگان
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