Assertion: cordierite | /r/HasAspect | basic chemical composition
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text: Although, as indicated, cordierite is considered to have a basic chemical composition, 2MgO.2Al 2 O 3 .nSiO 2 , there is evidence of limited solid solutions in cordierite toward the theoretical compound "Mg-beryl" (3MgO.Al 2 O 3 .6SiO 2 ), and also between cordierite and silica to the composition 2MgO.2Al 2 O 3 .nSiO 2 , where n can be any whole number from 5 to 8.