What is "scolecite"

Scolecite \Scol"e*cite\ (? or ?; 277), n. [Gr. skw`lhx, -hkos, a worm, earthworm.] (Min.) A zeolitic mineral occuring in delicate radiating groups of white crystals. It is a hydrous silicate of alumina and lime. Called also lime mesotype.

n. (context mineralogy English) A monoclinic-domatic mineral containing aluminum, calcium, hydrogen, oxygen, and silicon.

Scolecite is a tectosilicate mineral belonging to the zeolite group; it is a hydrated calcium silicate, Ca Al Si O· 3HO. Only minor amounts of sodium and traces of potassium substitute for calcium. There is an absence of barium, strontium, iron and magnesium. Scolecite is isostructural (having the same structure) with the sodium-calcium zeolite mesolite and the sodium zeolite natrolite, but it does not form a continuous chemical series with either of them. It was described in 1813, and named from the Greek word, σκώληξ (sko-lecks) = "worm" because of its reaction to the blowpipe flame.