What is vermiculite?


Vermiculite (Latin word vermiculus - "worm") is mica like mineral having a layered structure. Product of secondary alteration (hydrolysis and subsequent weathering) of dark mica biotite and phlogopite.



Exfoliated vermiculite is a loose, porous material in the form of scaly particles (silver or yellow), produced in accelerated roasting of vermiculite concentrate (hydromica containing bound water between layers).


Vermiculite is an environmentally friendly biostable product. At elevated temperatures, it does not emit any harmful for breathing gases and dust slurries, which is an important advantage compared to other known organic materials, such as rock wool and asbestos.


Chemical formula of vermiculite:

(Na0.21,K0.39,Mg0.19,Ca0.13,6H2O) (Mg5,Fe+²0.2,Fe+³0.8) [Si5.5,Al2.5,O20] (OH)4


The unique properties of vermiculite:

  • Fire Resistance
  • High Thermal Insulation
  • High Acoustic Insulation
  • High Moisture Capacity
  • Low Hygroscopicity
  • Environmental Safety
  • Biological Resistance
  • Chemical Inertness
  • Longevity
  • Lightweight Bulk Density
  • High Porosity
  • High Flowability
  • High Ion-Exchange Properties
  • Radiation Reflector
  • Odorless
  • Richness in minerals
  • High Infusibility
  • Elasticity
  • Asbestos Free

21.09.2021   12:01

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