Item talk:Q162738
From geokb
Mindat Short Description
Forms as an alteration product of biotite or phlogopite, by weathering or hydrothermal action. Vermiculite is mined as a natural insulation material.
The best exfoliation properties were observed not for pure vermiculite, but for intergrowths of ver...
Geoscience Ontology Status Notes
Webb T H (1824) New localities of tourmalines and talc, The American Journal of Science and Arts 7, 55-55
IMA Formula (from Mindat)
Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
RRUFF Formula (from Geoscience Ontology)
Mg0.7(Mg,Fe3+,Al)6(Si,Al)8O20(OH)4·8H2O
