Ekaterinite Locality: Korshunovskoye (Korzunovskoe; Korzhunovska; Korshunovskiy) Iron mine, Zheleznogorsk , Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia ( Locality at mindat.org ) Pearly aggregates of ekaterinite. Field of view 2 mm. — Photo: Leon Hupperichs · CC BY-SA 3.0
Ekaterinite
Ekaterinite is an IMA-recognized mineral species in the borate class, with the chemical formula Ca₂B₄O₇Cl₂·2H₂O.
It crystallizes in the hexagonal crystal system.
Key properties: Mohs hardness 1–1.5; specific gravity 2.44; Pearly luster; optically biaxial.
IMA symbol Eka, IMA status: approved, named in 1979.
Found in calcite and calcite–anhydrite veins in association with a mineralized skarn.
It is found associated with Halite, calcite, szaibélyite, korshunovskite, shabynite, iowaite, dashkovaite, siderite, hydromagnesite, quartz.
The mineral was named to honor Dr. Yekaterina Vladimirovna Rozhkova (1898–1979), Russian mineralogist, Research Institute of Mineral Resources, Moscow, Russia.