Tacharanite
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Tacharanite is a calcium aluminium silicate hydrate mineral of general chemical formula Ca12Al2Si18O3336 with some resemblance to the calcium silicate hydrate mineral tobermorite. It is often found in
Globular, white tacharanite (diameter 2.5 mm) from Palagonia, Italy
Spherical, cream-coloured tacharanite on white Na-phillipsite (a mineral series of the zeolite group) from Palagonia, northern Iblean plateau, Sicily, Italy (field of view 1 cm).
Laumontite
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Laumontite is a mineral, one of the zeolite group. Its molecular formula is CaAl2Si4O12·4H2O, a hydrated calcium-aluminium silicate. Potassium or sodium may substitute for the calcium but only in very
Tacharanite
…Scotland, UK. Tacharanite is associated there with other hydrated calcium silicates (tobermorite, gyrolite and xonotlite) and zeolites (aluminosilicates: laumontite, mesolite, thomsonite, and analcime) also found in neighbouring localities. It was first presumed by Sweet et al. (1961) to be a new member of the…
Laumontita
Laumontite crystals