Question Solved1 Answer 5. Explain or sketch how silicon-oxygen tetrahedra can join in five different geometries to produce five silicate mineral groups. 6. Describe the main light- and dark-colored silicate minerals, in terms of their chemical composition and density. 7. Select from the list you made in question 3, identify the most common class of minerals in the crust, mantle, and inner core. 8. List the three most abundant elements in the crust and in Earth as a whole and explain why silicate minerals are so abundant in the crust and mantle.

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Transcribed Image Text: 5. Explain or sketch how silicon-oxygen tetrahedra can join in five different geometries to produce five silicate mineral groups. 6. Describe the main light- and dark-colored silicate minerals, in terms of their chemical composition and density. 7. Select from the list you made in question 3, identify the most common class of minerals in the crust, mantle, and inner core. 8. List the three most abundant elements in the crust and in Earth as a whole and explain why silicate minerals are so abundant in the crust and mantle.
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Transcribed Image Text: 5. Explain or sketch how silicon-oxygen tetrahedra can join in five different geometries to produce five silicate mineral groups. 6. Describe the main light- and dark-colored silicate minerals, in terms of their chemical composition and density. 7. Select from the list you made in question 3, identify the most common class of minerals in the crust, mantle, and inner core. 8. List the three most abundant elements in the crust and in Earth as a whole and explain why silicate minerals are so abundant in the crust and mantle.
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Silicate structurehard fling Nesosilicate (Orthosilicate) Spgr:4 timh si:0 =1:4RI (Gament Z2incon, (Sphene CaTision (OH.T)3 Cyclosilicate (Melasilidlog) *** Double chain :- si:0 =4:11.rg: AmphiboleTremoliteHornblendeActinoliteGrlawophanerg(" Mica ")/(" Muscosice ") (Kadlinite) Chlonite)BiotiteChlovite6 Tectoselicate quad8:0=1:2 rgj Quantz, Feldepor, zeolite 1Q^(2)Massive & hard minerals 6. The dark silicates are also called ferromagnesian because of the presence of iron and magnesium in them. They include olivine, pyroxene, amphibole and biotite. The light-colored silicates include quartz, muscovite and feldspar. 7.  Feldspar is the most common mineral on earth, and quartz is the second most common mineral. It's c ... See the full answer