Dachiardite-K is a rare zeolite-group mineral with the formula K4(Si20Al4O48)•13H2O.
[5] [2] Dachiardite honors Italian geologist and mineralogist Antonio D'Achiardi.
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.
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