Hapenatomilla

Hapenatomilla is a rare and enigmatic mineral discovered in the late 20th century. It was first identified in a small mining town in the Andes Mountains, where it occurs in association with other rare minerals such as hapenite and tomichite. The mineral is named after the town of Hapenatomilla, where it was found, and the Greek word "tomichite," which means "to cut."

Hapenatomilla is a complex oxide mineral with the chemical formula (Ca,Na)2(Fe,Mn)3O6. It crystallizes in the cubic system and typically forms small, dark brown to black crystals or granular masses. The mineral is opaque and has a metallic luster. It is non-magnetic and has a hardness of approximately 5.5 on the Mohs scale.

The mineral's unique composition and structure make it of interest to mineralogists and geologists. It is believed to have formed under high-temperature and high-pressure conditions, possibly in the presence of fluids rich in calcium and sodium. Hapenatomilla is not known to have any significant economic value, but its rarity and beauty make it a sought-after specimen for collectors.

Despite its rarity, hapenatomilla has been found in only a few locations around the world. In addition to its type locality in the Andes, it has been reported from a single locality in the United States. The mineral's occurrence is still not well understood, and further research is needed to fully elucidate its genesis and distribution.