List of Mica Group Minerals

Table of Contents

1. Introduction to Mica Group Minerals

2. Classification of Mica Minerals

3. Major Mica Group Minerals

   • Muscovite

   • Biotite

   • Phlogopite

   • Lepidolite

   • Paragonite

   • Clintonite

   • Margarite

   • Fuchsite

4. AUKI MICA: High-End Mica Sheets Insulating Materials Supplier

5. Summary Table

Introduction to Mica Group Minerals

The mica group comprises a set of silicate minerals known for their sheet-like structure and perfect basal cleavage, allowing them to split into thin, flexible sheets. These minerals are prevalent in various rock types, including igneous, metamorphic, and sedimentary rocks.​Mindat+3The Open University+3galleries.com+3

Classification of Mica Minerals

Mica minerals are primarily classified based on their chemical composition and crystallographic properties:​dakotamatrix.com+15www2.tulane.edu+15huatemagnets.com+15

• Dioctahedral Micas: Contain two trivalent cations per formula unit. Examples include:

  • Muscovite

  • Paragonite

  • Margarite​www2.tulane.eduWikipedia+7Encyclopedia Britannica+7www2.tulane.edu+7Wikipedia+2www2.tulane.edu+2Mindat+2

• Trioctahedral Micas: Contain three divalent cations per formula unit. Examples include:

  • Biotite

  • Phlogopite

  • Clintonite​mineralseducationcoalition.orgWikipedia+2www2.tulane.edu+2Mindat+2

This classification aids in understanding their physical and chemical behaviors in various geological settings.​

Major Mica Group Minerals

Muscovite

• Chemical Formula: KAl₂(AlSi₃O₁₀)(OH)₂

• Color: Colorless to pale green

• Hardness: 2–2.5 on Mohs scale

• Uses: Electrical insulators, paints, cosmetics​Geosciences LibreTexts+1www2.tulane.edu+1galleries.comGeology Science

Muscovite is the most common mica mineral, known for its excellent insulating properties and resistance to heat.​

Biotite

• Chemical Formula: K(Mg,Fe)₃(AlSi₃O₁₀)(OH)₂

• Color: Dark brown to black

• Hardness: 2.5–3 on Mohs scale

• Uses: Geological studies, heat insulators​www2.tulane.edugalleries.com+5dakotamatrix.com+5Encyclopedia Britannica+5dakotamatrix.com+2Geology Science+2Wikipedia+2arXiv

Biotite is a common rock-forming mineral found in igneous and metamorphic rocks.​Geosciences LibreTexts+2科学直通车+2Encyclopedia Britannica+2

Phlogopite

• Chemical Formula: KMg₃(AlSi₃O₁₀)(OH)₂

• Color: Brown to reddish-brown

• Hardness: 2.5–3 on Mohs scale

• Uses: Electrical insulators, industrial applications​

Phlogopite is notable for its high thermal stability and is often used in electrical and thermal insulation.​

Lepidolite

• Chemical Formula: K(Li,Al)₃(Si,Al)₄O₁₀(F,OH)₂

• Color: Lilac to pink

• Hardness: 2.5–4 on Mohs scale

• Uses: Source of lithium, ornamental stone​www2.tulane.edu

Lepidolite is a lithium-rich mica, serving as a significant source of lithium for batteries and other applications.​www2.tulane.edu

Paragonite

• Chemical Formula: NaAl₂(AlSi₃O₁₀)(OH)₂

• Color: Colorless to pale green

• Hardness: 2.5–3 on Mohs scale

• Uses: Research, geological studies​

Paragonite is similar to muscovite but contains sodium instead of potassium.​Encyclopedia Britannica

Clintonite

• Chemical Formula: Ca(Mg,Al)₃(Si,Al)₄O₁₀(OH)₂

• Color: Green to reddish-brown

• Hardness: 3.5–4 on Mohs scale

• Uses: Collector’s mineral, research​Wikipedia+1www2.tulane.edu+1Geology SciencearXiv+4Wikipedia+4The Open University+4

Clintonite is a calcium-rich mica, less common than other micas but valued by collectors.​www2.tulane.edu

Margarite

• Chemical Formula: CaAl₂(Al₂Si₂)O₁₀(OH)₂

• Color: White to pink

• Hardness: 3.5–4.5 on Mohs scale

• Uses: Research, geological studies​Geosciences LibreTextsdakotamatrix.com+11www2.tulane.edu+11Wikipedia+11

Margarite is a calcium-rich, brittle mica often found in metamorphic rocks.​

Fuchsite

• Chemical Formula: K(Al,Cr)₂(AlSi₃O₁₀)(OH)₂

• Color: Green

• Hardness: 2.5–3 on Mohs scale

• Uses: Ornamental stone, metaphysical uses​www2.tulane.edu

Fuchsite is a chromium-rich variety of muscovite, known for its vibrant green