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Synthesis and Growing up a New Coloured Crystal from An Isomorphous Substances by Using The Overgrothes Phenomenon and Studied Its Pysical , Mecanical and Crystallographic Properties | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 50, 2014, Pages 177-190 | ||
| Author | ||
| Jassem Mohamad Abd Al Hassien | ||
| Abstract | ||
| Abstract Three crystals of sulfate salt were prepared under lab environments , these are : KAl(SO4)2.12H2O , Cr2(SO4)3 and KAlCr(SO4)2.12H2O . The physical and mechanical properties for the KAl(SO4)2.12H2O and KAlCr(SO4)2.12H2O crystals were studied . We deal with the latter crystal which called overgrowths and prepared from the isomorphous substances ( aluminum sulfate and chromium sulfate ) .We prepared this crystal by insertion few Cr atoms in the same places of Al atoms in the KAl(SO4)2.12H2O cubic lattic crystal . The crystallographic properties of an overgrothes crystal were studied. The new crystal crystallizes in the cubic system , space grope pa-3 . The cell dimentions are : a = b = c = 12.135 AO, α = β =γ =90o , volume of Al cell = 1786.98 *106 pm3 , volume of Al – Cr cell = 1800.26 *106 pm3 and Z=4 . The volume of cell indicates that the chemical composition of the two layers of crystal are different as it shown in formula data obtained from X – Ray analysis . the retsults obtained from FT-IR and UV. Visib. Spectrum are also support this conclusion . | ||
| Keywords | ||
| Al sulphate; Cr sulphate; overgrowthes crystal; Ray analysis; isomorphose substances | ||
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