Caption: Expanded vermiculite pellet. Vermiculite is a natural mineral that expands with the application of heat. Vermiculite (also known as Mica or Micafill) is used for insulating, soil conditioning and packing materials. It consists of expanded mica that has a highly laminated structure. Mica is a mineral composed of aluminum silicate along with sodium, magnesium and potassium silicates. Its salient characteristic is its perfect basal cleavage, which means that it can be separated into very thin laminae (layers). It is non-flammable, and because the expansion process introduces air between the layers it is lightweight, and a good insulator. Vermiculite is mined in the United States and South Africa.
Magnification*: x120
Type: SEM
Copyright 2009 Dennis Kunkel Microscopy, Inc.
Keywords: 23407E,miscellaneous,mica,vermiculite,mineral,packing material,SEM,micafall,insulation,insulation material,insulation materials,minerals,packaging,packaging material,packaging materials,aluminium silicate,magnesium,sodium,basal cleavage,non-flammable material,non-flammable materials,nonflammable material,nonflammable materials,potassium silicate,potassium silicates,insulator,basalt mineral,basalt minerals,basaltic mineral,basaltic minerals,soil conditioner,mica pellet,mica pellets,soil conditioning,packing materials,exfoliated vermiculite,exfoliation,06.01.09,zonolite,high temperature insulation,high temperature insulations,high-temperature insulation,high-temperature insulations,refractory insulation,refractory insulations,sheet silicate,sheet silicate mineral,sheet silicate minerals,sheet silicates