China Expanded Vermiculite for Gardening Growing Seedlings Grow Vegetable

The Name
vermiculite,expanded vermiculite,Exfoliated vermiculite
The name vermiculite comes from the Latin "vermiculus," meaning larva or small and worm-like, or "vermiculare," meaning to breed worms, for its characteristic look when undergoing exfoliation.
What is vermiculite?
Vermiculite is the name of a group of hydrated laminar minerals (aluminum-iron magnesium silicates) which look like mica.
Vermiculite deposits are associated with volcanic ultramafic rocks rich in magnesium silicate minerals, and flakes of the mineral range in color from black to shades of brown and yellow. The crystal structure of vermiculite contains water molecules, a property that is critical to its processing for common uses.
Using a process called exfoliation - in which vermiculite flakes are heated to 900 degrees Celsius or higher, causing water within the flakes to flash to steam and expand - crude vermiculite ore is processed into particles that are eight to 20 times larger. The resulting lightweight material is chemically inert and fire resistant, with low density and low thermal conductivity. It is also odorless, has high liquid absorption capacity and catalytic properties.
Features:

Expanded Vermiculite

Characters: Inorganic, inert and aterile, non-abrasive, ultra lightweight, Fireproof etc.

Size: 20-40mesh, 40-60mesh, 1-3mm, 2-4mm, 3-6mm, 4-8mm etc.

Packing: 100L/bag, 300bags/20'fcl or 730bags/40HQ.

ItemContent %SiO237.56AL2O311.8K2O6.4Fe2O35.15MgO23CaO1.51TiO20.6H207