Another secret of meteorites
What meteorite secrets do you know?
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The lamellar structure of the meteorite is called a Widmanstätten structure. It forms when meteorites cool extremely slowly in space. The metals that make up the meteorite gradually dissolve in hydrochloric acid, yielding iron(II) chloride, which rapidly reacts with oxygen dissolved in the acid to form iron(III) chloride. Iron(III) chloride reacts with potassium hexacyanoferrate(II) to form a pigment known as Prussian blue. The added sodium fluoride reacts with iron(III) chloride, after which the iron cations practically stop interacting with other reagents. Therefore, nickel cations can be detected by adding dimethylglyoxime – the solution turns pinkish-red as a new nickel compound forms. When potassium thiocyanate is added, cobalt cations react with it, and the resulting compound turns butan-1-ol blue. Iron, nickel, and cobalt are metals with significant magnetic properties, so a piece of meteorite is strongly attracted to a magnet.
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