vermiculite

Vermiculite is puffed clay mineral. It serves as an aggregate of substrate improvement by easing, large storing capacity for nutrients and water.

The grain size is 1-3 mm.

Vermiculite is one of the clay minerals, which contribute by their ion exchange capacity significantly to soil fertility. They are similar both structurally and from the appearance of the mica minerals and it forms flaky crystals.

Sudden heating the water of crystallization escapes explosively as steam and drives the individual layers of the structure apart.

By this method the single crystal layers are separated from each other such that expand the originally solid, flat crystals into long wormlike particles.
The volume thereby increases to 20 times.
The name 'vermiculite' is from the Latin and designate the appearance: Vermiculus ---> the worm.

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