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Formula: Ca2B4O7Cl2.2H2O
Hydrated unclassified borate
Crystal system: Hexagonal
Specific gravity: 2.440 measured, 2.17 calculated
Hardness: 1 to 1½
Colour: White, white with a slight rose tint
Luminescence: Bluish luminescence and phosphorescence under UV
Solubility: Hygroscopic with swelling, soluble in water
Environments
Localities
At the type locality, the Korshunovskoye iron deposit, Zheleznogorsk-Ilimsky, Nizhneilimsky District, Irkutsk Oblast,
Russia, ekaterinite was found in 3 drill cores at depths of 820 to 1260 metres in carbonate- and
carbonate-anhydrite rocks of the
skarn ore deposit. It forms finely foliated aggregates of hexagonal
crystals, 1 mm or less in size
(AM 66.436-439).
Associated minerals include halite,
calcite, szaibélyite,
korshunovskite, shabynite,
iowaite, dashkovaite,
siderite, hydromagnesite
and quartz
(HOM).
Ekaterinite from the Korshunovskoye iron
deposit - Image
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