ENVB 210 Lecture Notes - Lecture 13: Montmorillonite, Chemical Formula, Vermiculite

37 views2 pages

Document Summary

Isomorphous substitution: creates negative charge in the clay. For this to occur the size, not the charge of the ions matters. The higher the negative charge, the higher the cations exchange capacity (ece) which is the ability to hold cations. Note: those cations are the accessory cations, not those in the crystal structure (unavailable). Highly weathered clay that has lost mg, ca. (found in highly weathered regions) Relatively high negative charge because high rate of si4+ replaced by al3+ very attractive to k+, prevents crystal expansion (layers held tightly with k+) A lot of soils in quebec will have a lot of potassium because of illite clays. Vermiculite: 2:1 the clay with the highest charge (development in the tetrahedral sheet) Used for holding water in potting soils or used for insulation. Exposed to a high heat, layers will separate hold water. However, swelling is limited because the layers are close to cations.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents