Primarygun Posted April 6, 2005 Share Posted April 6, 2005 If there are two salts in a solution, evaporating the water slowly to boil the water away, two kinds of crystals are formed. Why the each of the crystals is not contaminated by the other salt,like staying in the "core" of the crystal? Link to comment Share on other sites More sharing options...
YT2095 Posted April 7, 2005 Share Posted April 7, 2005 they won`t fit into the structure, it`s a bit like having Duplo bricks and lego all mixed up in a bag, only lego will fit to other lego and so on. Link to comment Share on other sites More sharing options...
Primarygun Posted April 7, 2005 Author Share Posted April 7, 2005 Is it very pure? Link to comment Share on other sites More sharing options...
YT2095 Posted April 7, 2005 Share Posted April 7, 2005 I`m not quite sure I understand your questions context? many crystals are Very pure indeed, however under certain circumstances (Heat and Pressure mainly) Impurities can be "Added" to a crystal, take Aluminium Oxide crystals, they can be Emeralds or Rubies, they`re both Alu Oxide, but with different impurities , giving them their unique color Link to comment Share on other sites More sharing options...
ed84c Posted April 7, 2005 Share Posted April 7, 2005 most crystals also contain H2O, so even "pure" CuSO4 is not really. Link to comment Share on other sites More sharing options...
YT2095 Posted April 7, 2005 Share Posted April 7, 2005 most crystals also contain H2O, so even "pure" CuSO4 is not really. what do you mean by "Most"? Link to comment Share on other sites More sharing options...
jdurg Posted April 7, 2005 Share Posted April 7, 2005 That's why we write it out as CuSO4*xH2O. Link to comment Share on other sites More sharing options...
Tetrahedrite Posted April 8, 2005 Share Posted April 8, 2005 most crystals also contain H2O, so even "pure" CuSO4 is not really. I would have to disagree with that statement. Replace "most" with "some". It is also worth noting that CuSO4 does occur in nature without any waters of hydration (chalcocyanite). Other hydration states also exist: CuSO4.H20 Poitevinite CuSO4.3H2O Bonattite CuSO4.5H20 Chalcanthite CuSO4.7H2O Boothite (a very rare mineral that I have recently written a paper on) Each of these species have different crystal structures and definite stoichiometric amounts of water, which means the water can't really be called an impurity. Link to comment Share on other sites More sharing options...
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