Question

Which one of the following minerals is NOT a framework silicate?

• A. Feldspar
• B. Zeolite
• C. Chlorite
• D. Quartz

Answer 1

The Correct Option is C

Silicate minerals are the most common type of minerals found in the Earth's crust. They are categorized based on the arrangement of silicate tetrahedra. Framework silicates, also known as tectosilicates, have a three-dimensional framework of silicate tetrahedra. Let's analyze each option:

1. Feldspar: Feldspars are a group of rock-forming minerals that are tectosilicates, meaning they have a three-dimensional framework of silicate tetrahedra. They are a common component of granite and other igneous rocks.
2. Zeolite: Zeolites are also framework silicates. They have a porous, open structure composed of interconnected tetrahedra, which makes them useful for adsorption and ion-exchange applications.
3. Chlorite: Chlorite minerals belong to the phyllosilicate group rather than the tecto-silicate group. Unlike framework silicates, phyllosilicates have a sheet-like structure.
4. Quartz: Like feldspar, quartz is a common tectosilicate mineral. It forms a three-dimensional network of silicate tetrahedra, which gives it its notable hardness and resistance to weathering.

Based on the above analysis, Chlorite is the mineral that is NOT a framework silicate, as it belongs to the phyllosilicate group. Therefore, the correct answer is Chlorite.