Item talk:Q162625

Mindat Short Description

Pyrophyllite-Talc Group. The Al analogue of ferripyrophyllite.

Two polytypes are known, a monoclinic one (2M) and a triclinic one (1A).

Geoscience Ontology Status Notes

Hermann R (1829) Zerlegung des Pyrophyllits, eines neuen Minerals, Annalen der Physik und Chemie 15, 592-592

IMA Formula (from Mindat)

Al₂Si₄O₁₀(OH)₂

RRUFF Formula (from Geoscience Ontology)

Al₂Si₄O₁₀(OH)₂

Additional References

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

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