karkassile
Karkassile is a rare and enigmatic mineral discovered in the late 20th century. It is primarily found in the remote regions of the Kola Peninsula in Russia, where it occurs in small, scattered deposits within serpentinite rocks. The mineral was first identified in 1987 by a team of Russian geologists, who named it after the Russian word for "skeleton" (karkas), reflecting its unique, skeletal-like crystal structure.
Karkassile is a complex silicate mineral with the chemical formula (Mg,Fe)3Si2O5(OH)4. It crystallizes in the monoclinic
The exact formation conditions of karkassile are not fully understood, but it is believed to form under