Is Beryl (Al2Be3Si6O18) a covalent molecular, metallic, ionic or covalent network?

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Beryl, (`Be_3Al_2(SiO_3)_6`) is classified as a mineral that is composed of Beryllium and Aluminum and Silicate forming a hexagonal crystal lattice structure. There are different kinds of beryl and can be physically distinguished by the differences of color due to the existence of other material in the crystal system. The...

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Beryl, (`Be_3Al_2(SiO_3)_6`) is classified as a mineral that is composed of Beryllium and Aluminum and Silicate forming a hexagonal crystal lattice structure. There are different kinds of beryl and can be physically distinguished by the differences of color due to the existence of other material in the crystal system. The atoms form a network of covalent bonding among them thus creating the crystal lattice system. This type of bonding is present in minerals such as diamond (continuous network of carbon) or quartz (continuous three dimensional network of SiO2).
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