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
Tobermorite
…mineral Xonotlite – Inosilicate mineral Other calcium aluminium silicate hydrate, (C-A-S-H) minerals: Hydrogarnet Hydrogrossular Hydrotalcite Katoite Tacharanite (Ca12Al2Si18O33(OH)36) Tobermorite in the American Mineralogist Crystal Structure Database…
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).