302-pp25 - UNIVERSITY OF SOUTH ALABAMA Last Time Class VIII...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
GY 302: Crystallography & Mineralogy GY 302: Crystallography & Mineralogy UNIVERSITY OF SOUTH ALABAMA Lecture 25: Class VIII-Silicates Tektosilicates part 1: Quartz Lecture 25: Class VIII-Silicates Tektosilicates part 1: Quartz Last Time Class VIII Minerals (Phyllosilicates) A) Serpentine Group B) Other Phyllosilicates C) Clay Minerals (chemistry, modes of analysis) More Phyllosilicate Minerals Mineral Formula System “Clay” Minerals Kaolinite Al 2 Si 2 O 5 (OH) 4 Triclinic *”Smectite” (Na,Ca) 0-3 (Al,Mg) 2 Si 4 O 10 (OH) 2 ·n(H 2 O) Monoclinic *Bentonite (Na,Ca) 0-3 (Al,Mg) 2 Si 4 O 10 (OH) 2 ·n(H 2 O) Monoclinic *Illite (K,H 2 O)(Al,Mg,Fe) 2 (Si,Al) 4 O 10 [(OH) 2 ·(H 2 O) Monoclinic Serpentine Group (17 minerals) ”Serpentine” (Mg, Fe, Ni) 3 Si 2 O 5 (OH) 4 Monoclinic *Antigorite Mg 3 Si 2 O 5 (OH) 4 Monoclinic Chrysotile Mg 3 Si 2 O 5 (OH) 4 Monoclinic Other Phyllosilicates Stilpnomelane (series) ~K(Fe, Al) 10 Si 12 O 30 (OH) 2 Triclinic Prehnite (series) Ca 2 Al(AlSi 3 O 10 )(OH) 2 Orthorhombic Sepiolite Mg 4 Si 6 O 15 (OH) 2 ·6(H 2 O) Orthorhombic Garnierite (Ni,Mg) 4 Si 6 O 15 (OH) 2 ·6(H 2 O) Orthorhombic Apophylite KCa 4 (Si 4 O 10 ) 2 F·8(H 2 O) Tetragonal Astrophyllite** K 2 Na(Fe ++ ,Mn) 7 Ti 2 Si 8 O 26 (OH) 4 Triclinic Clay Geochemistry (1:1 structure) kaolinite (Non-expandable) K + Halloysite (Expandable) H 2 O 70nm 100 nm Illite/Muscovite (Non-expandable) K + Smectite (Expandable) H 2 O Clay Geochemistry (2:1 structure) Illite/Muscovite (Non-expandable) K + Smectite (Expandable) Clay Geochemistry (2:1 structure) 100 nm 170 nm “glycol”
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Clay Mineral Analysis Is primarily done using XRD ( X-ray diffraction ). In order to understand how this works, you need to consider physics (yuck). Clay Mineral Analysis Is primarily done using XRD ( X-ray diffraction ). In order to understand how this works, you need to consider physics (yuck). Clay Mineral Analysis
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/05/2012 for the course GLY 302 taught by Professor Staff during the Spring '11 term at S. Alabama.

Page1 / 5

302-pp25 - UNIVERSITY OF SOUTH ALABAMA Last Time Class VIII...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online