Color Snow-white | Formula(repeating unit) K4(Si20Al4O48)·13H2O | |
Crystal system MonoclinicUnknown space group Unit cell a = 18.67, b = 7.51c = 10.23 [Å], β = 107.79° (approximated) Crystal habit Needle-like crystals in spherical aggregates | ||
Dachiardite-K is a rare zeolite-group mineral with the formula K4(Si20Al4O48)•13H2O. It is the potassium-analogue of dachiardite-Ca and dachiardite-Na, as suggested by the suffix "-K".
Occurrence and association
Dachiardite-K was discovered in opal-chalcedony veins in Eastern Rhodopes, Bulgaria. It is associated with barite, calcite, clinoptilolite-Ca, clinoptilolite-K, celadonite, dachiardite-Ca, dachiardite-Na, ferrierite-K, ferrierite-Mg, ferrierite-Na, mordenite, and smectite.
References
Dachiardite-K Wikipedia(Text) CC BY-SA