The mineral brucite, Mg(OH) 2 , adopts a CdI 2 -type structure, and substitution of Al 3+
Question:
The mineral brucite, Mg(OH)2, adopts a CdI2-type structure, and substitution of Al3+ for Mg2+ results in a series of materials of general formula
where x ≈ 0.10–0.35.
(a) With the aid of a diagram, describe the CdI2 prototype structure. Detail the interactions that operate within and between the layers.
(b) Brucite crystals are easily cleaved in one direction. Why is this?
(c) What is the effect of going from
on the charge of the sheets in the crystal lattice?
(d) Suggest where the Xn− anions and water molecules reside in
and comment on intermolecular forces that operate within the crystal lattice.
(e)
materials may be used to remove toxic anions (e.g. arensite, [AsO2]−) from water. Suggest why they are suitable for this application and how the anion extraction works.
Step by Step Answer:
a CdI2 Prototype Structure of Brucite The CdI2 prototype structure of brucite consists of hexagonal closepacked hcp layers of hydroxide ions OH stacke...View the full answer
