Question

Mica is which type of mineral?

• A. Energy mineral
• B. Non-metallic
• C. Ferrous metallic
• D. Non-ferrous metallic

Answer 1

Answer:

B. Non-metallic

Mica: A Non-Metallic Mineral

Mica is classified as a non-metallic mineral. Unlike metallic minerals, mica does not contain metals as a significant component. It is a group of silicate minerals that are valued for their unique physical properties.

Key Characteristics of Mica:

• Sheet Structure: Mica minerals are characterized by their layered or sheet-like structure. This allows them to be easily split into very thin, flexible, and elastic sheets.

• Electrical and Thermal Insulation: Mica is an excellent electrical insulator and a good thermal insulator. This property makes it highly valuable in electrical and electronic applications.

• Luster: It typically exhibits a pearly or vitreous luster.

• Hardness: On the Mohs scale of hardness, mica generally ranges from 2 to 4, making it relatively soft.

Major Types of Mica:

The two most commercially important types of mica are:

1. Muscovite: Often called "white mica" or "isinglass," it is typically colorless, light brown, or silver. It is a good electrical insulator and has high heat resistance.

2. Biotite: Often called "black mica," it is usually black, dark brown, or dark green. It is less common in electrical applications compared to muscovite due to its lower resistance to heat and electrical conductivity.

Uses of Mica:

• Electrical Industry: Used as an insulator in electrical appliances, generators, motors, and capacitors.

• Construction: Incorporated into cement, paints, and plaster for its insulating and fire-retardant properties.

• Cosmetics: Ground mica adds shimmer and sparkle to makeup products like eyeshadow and blush.

• Manufacturing: Used in the production of plastics, rubber, and ceramics.

Geographical Distribution in India:

India is one of the world's largest producers and exporters of mica. Significant mica deposits are found in the states of:

• Jharkhand: Particularly in the Koderma and Giridih districts, known as the "Mica Belt of India."

• Bihar: Also part of the Mica Belt.

• Rajasthan: Major producing areas include Bhilwara, Tonk, and Ajmer.

• Andhra Pradesh: Deposits are found in Nellore and other districts.