Item talk:Q162697

Mindat Short Description

Almost always in foliated masses ranging from white to beautiful bluish green. Usually found in metamorphic rocks with abundant carbonate minerals associated.

Chemically similar to Serpentine Subgroup (Mg-richer, with Mg:Si = 3:2).

Geoscience Ontology Status Notes

Mineral name has been known since antiquity and predates any formal descriptive publication. For instance, it is mentioned in: Agricola G (1546) Talk, in De Ortu & Causis Subterraneorum Lib. V, Froben (Basileae) 480-480

IMA Formula (from Mindat)

Mg₃Si₄O₁₀(OH)₂

RRUFF Formula (from Geoscience Ontology)

Mg₃Si₄O₁₀(OH)₂

Additional References

• http://www.handbookofmineralogy.com/pdfs/talc.pdf

• http://www.webmineral.com/data/Talc.shtml