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How will the addition of a second component affect the crystallization relationship of a single one component system in albite-anorthite solid solution series?
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Rahul kumar
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Addition of second component in crystallization relationship of a single one component will change the crystallization temperature. For example, a melt containing pure Anorthite will crystallize at temperature 1553°C. The crystallization of melt containing pure Anorthite only will crystallize at a single temperature. Adding Albite in the Anorthite melt will lower the first crystallization temperature (first crystal will form at temp less than 1553°C) and the melt will crystallize over a range of temperature i.e. a solid solution. Similarly, melt containing pure Albite will crystallize at a single temperature (melting point of Albite i.e. 1118°C). Adding Anorthite in a melt containing Albite only will elevate the initial crystallization temperature (greater than melting point of Albite i.e. 1118°C) and will crystallize over a range of temperature. Overall, addition of second component in a single component system will- 1. change the first crystallization temperature 2. Crystallization will complete at a wide range of temperature (not at a single temperature)
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Sajan sarthak Best Answer
When ever there is a monocomponet the freezing point and the mealting point is same.(Pure) At that point when the other component is added the higher concentration material will be like controlling one and lower concentration is like impurity. When the impurity percentage is less it will decrease the mealting point slowly if high it will affect the mealting and freezing point vitally so creating a gap in them we call them solidus and liquidus ...so gap is seen in between them means a range of temperature is needed from solid to liquid. Albite 90 anorthite 10 means anorthite is impurity here .