Materials

Mica

Mineral Group

Citation Formats

General Reference

Earth and Environment Atlas. "Mica." Accessed August 30, 2026. https://earth.interactiveatlas.org/materials/mica.

APA Style

Earth and Environment Atlas. (n.d.). Mica. Retrieved August 30, 2026, from https://earth.interactiveatlas.org/materials/mica

BibTeX

@misc{earthandenvironmentatlas-mica,
  author = {Earth and Environment Atlas},
  title = {Mica},
  year = {2026},
  url = {https://earth.interactiveatlas.org/materials/mica},
  note = {Accessed August 30, 2026}
}

A group of sheet silicate minerals that split into thin, flexible, glittering layers. It is the flecked shine in granite and gneiss, and the third of the three common minerals, with quartz and feldspar, that give granite its speckled texture.

Facts

Kind

Mineral 1

Formation Class

Sheet silicate (phyllosilicate) 1

Chemical Formula

X2Y4-6Z8O20(OH,F)4 (general mica-group formula) 2

Hardness (Mohs)

2.5 1

Cross-Tradition Connections

In Discipline

Mineralogy

Source Mineral (Wikipedia)

Sources

1. Mineral (Wikipedia)

Wikimedia FoundationView the Source

2. Mica (Wikipedia)

Wikimedia FoundationClassification section

Quote, Classification section

X2Y4-6Z8[O]20([OH],[F])4

View the Source

Comments (0)

No comments yet. Be the first to share a thought.

Reader Challenges (0 open reader challenges)

No disputes yet. Spotted an error or a better source? Open the first one.

View At A Past Year

The atlas records no dated fact of its own for this entry, so there is no other year to choose.

Switch Atlas

The Inner World

The Civil World

The Natural World