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Zone melting (or zone refining, or floating-zone method, or floating-zone technique) is a group of similar methods of purifying crystals, in which a narrow region of a crystal is melted, and this molten zone is moved through the crystal. The molten region melts impure solid at its forward edge and leaves a wake of purer material solidified ...
For pure elements or compounds, e.g. pure copper, pure water, etc. the liquidus and solidus are at the same temperature, and the term melting point may be used. There are also some mixtures which melt at a particular temperature, known as congruent melting. One example is eutectic mixture. In a eutectic system, there is particular mixing ratio ...
The meniscus height is affected by pulling speed and crystallization rate. The crystallization rate depends on the temperature gradient above the shaper, which is determined by the configuration of the hot-zone of the crystal growth furnace, and the power applied to the heating elements during growth.
Zone melting; Schematic diagrams showing the principles behind fractional crystallisation in a magma. While cooling, the magma evolves in composition because ...
Subduction zone chemistry: The subducted sediments and crust dehydrate and release water-rich fluids into the overlying mantle, causing mantle melting and fractionation of elements between the surface and deep mantle reservoirs, producing island arcs and continental crust. Hot fluids in subduction zones also alter the mineral compositions of ...
The accumulation zone is found at the highest altitude of the glacier, where accumulation of material is greater than ablation. On a glacier, the accumulation zone is the area above the firn line, where snowfall accumulates and exceeds the losses from ablation, (melting, evaporation, and sublimation).
LONDON (Reuters) -The dollar fell broadly on Monday, while European stocks jumped, after an official for the incoming U.S. administration said President-elect Donald Trump would stop short of ...
Zone melting; In chemistry, fractional crystallization is a stage-wise separation technique that relies on the liquid–solid phase change.