The Silicate Structures: Chalkboard Demonstration

Nov 06, 2014 · Silicate Structures, Structural Formula, Neso-, Cyclo-, and Soro- Silicates This document last updated on 06-Nov-2014 Silicate Structures and Structural Formula As we discussed in a previous lecture, the relative abundance of elements in the Earth's crust determines what minerals will form and what minerals will be common Because

Silicate Structures, Structural Formula, Olivines, Garnets

silicate group The basic structural unit is then SiO4-4 In this group the oxygens are shared with octahedral groups that contain other cations like Mg+2, Fe+2, or Ca+2 Olivine is a good example: (Mg,Fe) 2SiO4 2 of 12 11/11/2002 12:12 PM Silicate Structures, Olivines, Garnets, & Aluminosilicates

5 Systematics of High-Pressure Silicate Structures

While hundreds of silicate structures have been catalogued (see e g Liebau 1985), only about 50 different structure types account for almost all of the volume of the crust and mantle (Smyth and Bish 1988) A common feature of low-pressure silicate structures is the presence of silicon cations exclusively in four coordination by oxide anions (IVSi

Structure Cleavage Si:O Ratio Minerals

Geology Handout #1 - Silicate Structures 1 Independent Tetrahedra (Nesosilicates)2 Single Chains (Inosilicates)3 Double Chains (Inosilicates)4 Sheets (Phyllosilicates)

Structural Chemistry of Silicates - FHI

Silicate Chemistry •How are silicate structures connected and constructed? •What is the influence of the Si/O-ratio on the silicate structure •How do kind, number and size of counterions influence the structure

s Rules and Silicate Structures

1 Pauling ’ s Rules and Silicate Structures Lecture 4 Elemental Abundance in Crust 1 9 24 3 2 1 Mg 1 4 39 1 2 6 K 2 6 23 0 2 8 Na 1 9 40 1 3 6 Ca 1 9 55 8 5 0 Fe 6 4 27 0 8 1 Al 21 2