Given the following formula (full-cell formula) for two clay minerals:
Clay Mineral (A) -M(Ca, Mg).66 H2O Si8Al3.34 Fe2+ .33Mg2+.33 O20(OH)4
Layer negative charge = 0.66 equivalents/unit cell
Clay Mineral (B) – M(K)1.0Si7Al1 Al4.0 O20 (OH)4
Layer negative charge = 1.00 equivalent/unit cell
a. List the elements in the tetrahedral layer of Clay Mineral (A).
b. List the elements in the tetrahedral layer of Clay Mineral (B).
c. Is Clay Mineral (B) DI- or tetrahedral? Why? Show why in terms of Al atoms associated with a polyhedron of anions.
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Added on 01.03.2016 16:28
Given the following formula (full-cell formula) for two clay minerals:
Clay Mineral (A) -M(Ca, Mg).66 H2O Si8Al3.34 Fe2+ .33Mg2+.33 O20(OH)4
Layer negative charge = 0.66 equivalents/unit cell
Clay Mineral (B) – M(K)1.0Si7Al1 Al4.0 O20 (OH)4
Layer negative charge = 1.00 equivalent/unit cell
a. List the elements in the tetrahedral layer of Clay Mineral (A).
b. List the elements in the tetrahedral layer of Clay Mineral (B).
c. Is Clay Mineral (B) DI- or tetrahedral? Why? Show why in terms of Al atoms associated with a polyhedron of anions.
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